/**********************************************************************
// @@@ START COPYRIGHT @@@
//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
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**********************************************************************/
/* -*-C++-*-
 *****************************************************************************
 *
 * File:         exp_conv.cpp
 * Description:
 *
 *
 * Created:      7/10/95
 * Language:     C++
 *
 *
 *
 *
 *****************************************************************************
 */


#include "Platform.h"
#include "exp_ieee.h"
#include <stdlib.h>
#include <errno.h>

#include <math.h>
# define MathPow(op1, op2, err) pow(op1, op2)
//extern double MathPow(double Base, double Power, short &err);
#define MathLog10(op, err) log10(op)
#include <stdlib.h>

#include "exp_stdh.h"
#include "exp_clause_derived.h"

#include "float.h"
#include "str.h"
#include "wstr.h"
#include "BigNumHelper.h"
#include "NAAssert.h"
#include "NLSConversion.h"
#include "nawstring.h"
#include "exp_datetime.h"
#include "SQLTypeDefs.h"
#include "exp_bignum.h"
#include "fenv.h"

// forward declarations

static 
rec_datetime_field getIntervalStartField(Lng32 datatype);

Int64 getMaxDecValue(Lng32 targetLen);

Lng32 getDigitCount(UInt64 value);

void setVCLength(char * VCLen, Lng32 VCLenSize, ULng32 value);

ex_expr::exp_return_type checkPrecision(Int64 source,
					Lng32 sourceLen,
                                        short sourceType,
                                        Lng32 sourcePrecision,
                                        Lng32 sourceScale,
                                        short targetType,
                                        Lng32 targetPrecision,
                                        Lng32 targetScale,
                                        CollHeap *heap,
                                        ComDiagsArea** diagsArea,
                                        ULng32 flags);

//////////////////////////////////////////////////////////////////
//
// Function to double the value of the varchar length field for
// Unicode related conversion. All unicode related conversions 
// involving non-chartype operands reuse the corresponding
// Ascii version. This function is used to adjust the varchar
// length calculated by the Ascii function. 6/3/98
// 
//////////////////////////////////////////////////////////////////
void double_varchar_length(
         char * varCharLen,      // NULL if not a varChar
         Lng32 varCharLenSize     // 0 if not a varChar
			  )
{
   if (varCharLenSize == sizeof(Lng32)) {
       Lng32 x;
       str_cpy_all((char*)&x, varCharLen, sizeof(Lng32));
       x *= BYTES_PER_NAWCHAR;
       str_cpy_all(varCharLen, (char *)&x, sizeof(Lng32));
   } else {
       short x;
       str_cpy_all((char*)&x, varCharLen, sizeof(short));
       x *= BYTES_PER_NAWCHAR;
       str_cpy_all(varCharLen, (char *)&x, sizeof(short));
   }
}

//////////////////////////////////////////////////////////////////
//
//A helper function to return charset name
//
/////////////////////////////////////////////////////////////////
static const char* scaleToString(short scale)
{
  switch(scale)   
  {
    case SQLCHARSETCODE_ISO88591:
        return "ISO88591";
    case SQLCHARSETCODE_KANJI:
        return "KANJI";
    case SQLCHARSETCODE_KSC5601:
        return "KSC5601";
    case SQLCHARSETCODE_SJIS:
        return "SJIS";
    case SQLCHARSETCODE_UCS2 :
        return "UCS2";
    case SQLCHARSETCODE_EUCJP :
        return "EUCJP";
    case SQLCHARSETCODE_BIG5: 
        return "BIG5";
    case SQLCHARSETCODE_GB18030:
        return "GB18030";
    case SQLCHARSETCODE_UTF8:
        return "UTF8";
    case SQLCHARSETCODE_MB_KSC5601:
        return "MB_KSC5601";
    case SQLCHARSETCODE_GB2312:
        return "GB2312";
    case SQLCHARSETCODE_GBK:
        return "GBK";
    default:
        return "UNKNOWN";
  }
  return "UNKNOWN";
} 
//////////////////////////////////////////////////////////////////
//
// A helper function that multiplies the dvalue by 10 and
// adds the digit. It checks overflow during the computation.
//
// This function returns 0 if not overflow or 1 otherwise.
//
// This function is used by convAsciiToFloat64 to coverting
// a string of digits to double. jdu 6/10/02
// 
//////////////////////////////////////////////////////////////////
static Int32 safe_add_digit_to_double(
         double dvalue,        // Original value
         Int32 digit,            // Single digit to be added
         double * result
			  )
{
    short ov;

    *result = MathReal64Mul(dvalue, (double)10, &ov);

    if (ov != 0) // result overflowed
      return ov;

    *result = MathReal64Add(*result, (double)digit, &ov);
    return ov;
}


//////////////////////////////////////////////////////////////////
// function to convert a signed BIN (of 2, 4 or 8 bytes) to
// a signed BIN (of 2, 4 or 8 bytes), with multiplication by a
// scaling factor
//
// This is useful when overflows and truncations from scaling
// need to be captured; but it also works with the diagsArea
// error model.
//
// Returns ex_expr::EXPR_OK if (conversion was successful) or (a
// conversion error occurred and the data conversion error flag
// is present).
//
// Returns ex_expr::EXPR_ERROR if (a conversion error occurred) and
// (no data conversion error flag is present).
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convBinToBinScaleMult(
  char *target,
  short targetType,
  Lng32 targetLen,
  Lng32 targetPrecision, 
  Lng32 targetScale, 
  char *source,
  short sourceType,
  Lng32 sourceLen,
  Lng32 sourcePrecision, 
  Int64 scaleFactor,
  CollHeap *heap,
  ComDiagsArea** diagsArea,
  Lng32 *dataConversionErrorFlag,
  ULng32 flags) 
{
Lng32 tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_OK; // assume success
ex_expr::exp_return_type rc = ex_expr::EXPR_OK;

// widen source to Int 64
Int64 intermediate;

switch (sourceLen) 
  {
  case SQL_SMALL_SIZE:
    intermediate = *(short *)source;
    break;
  case SQL_INT_SIZE:
    intermediate = *(Lng32 *)source;
    break;
  case SQL_LARGE_SIZE:
    intermediate = *(Int64 *)source;
    break;
  default:
    // shouldn't happen
    intermediate = 0;
    break;
  }

assert (sourceType >= REC_MIN_INTERVAL && sourceType <= REC_MAX_INTERVAL &&
         targetType >= REC_MIN_INTERVAL && targetType <= REC_MAX_INTERVAL);

// make sure value is small enough to be successfully converted,
// then convert it else raise an error

if ((intermediate < LLONG_MAX/scaleFactor) && 
    (intermediate > LLONG_MIN/scaleFactor))
  {
  intermediate = intermediate * scaleFactor;
  }
else if (dataConversionErrorFlag)
  {
  if (intermediate > 0)
    {
    // result too large -- just set it to max
    intermediate = LLONG_MAX;
    tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
    }
  else
    {
    // result too small -- just set it to min
    intermediate = LLONG_MIN;
    tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
    }
  }
else
  {
  ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                        sourceLen, sourceType, 0, targetType, flags);
  return ex_expr::EXPR_ERROR; 
  }

// now move converted intermediate to target

if (targetLen == SQL_LARGE_SIZE)
  {
  *(Int64 *)target = intermediate;  // yeah, it's an extra move
  if (dataConversionErrorFlag)
    *dataConversionErrorFlag = tempDataConversionErrorFlag;
  if (((sourceType >= REC_MIN_INTERVAL) &&
      (sourceType <= REC_MAX_INTERVAL) &&
      (targetType >= REC_MIN_INTERVAL) &&
      (targetType <= REC_MAX_INTERVAL)) &&
      (getIntervalStartField (sourceType) < 
       getIntervalStartField (targetType) ||
       sourcePrecision > targetPrecision  )) // truncation is possible
       {
        rc =  checkPrecision(intermediate,
			     sourceLen,
                             sourceType,
                             sourcePrecision,
                             targetScale,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             flags);
       }
  }
else 
  {
  short physicalTargetType = (short) REC_BIN16_SIGNED;
  ConvInstruction index = CONV_BIN64S_BIN16S;

  if (targetLen == SQL_INT_SIZE)
    {
    physicalTargetType = (short) REC_BIN32_SIGNED;
    index = CONV_BIN64S_BIN32S;
    }
      
  // In this convDoIt, we're purposely passing in 0 for target precision
  // because we don't want this convDoIt to check for precision validity 
  // since this call to convDoIt is converting 2 binary operands, and not 
  // intervals.  checkPrecision is called after this convDoIt with the correct 
  // interval types
  rc = convDoIt((char *) &intermediate, 
		SQL_LARGE_SIZE,
		(short) REC_BIN64_SIGNED,
		sourcePrecision,
		0, // sourceScale
		target,
		targetLen,
		physicalTargetType,
		0,   //target precision
		0, // targetScale,
		NULL, // varCharLen
		0,    // varCharLenSize
		heap,
		diagsArea,
                index,
                dataConversionErrorFlag,
                flags | CONV_INTERMEDIATE_CONVERSION);

  // if there was no error on the second conversion,
  // then report back any error from the first conversion
  // (see the discussion in convDoIt() case CONV_LARGEDEC_BIN16S
  // for a proof of why this is the correct thing to do)
  if (dataConversionErrorFlag) {
    if (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_OK)
      *dataConversionErrorFlag = tempDataConversionErrorFlag;
  }
  if (rc != ex_expr::EXPR_OK) {
    return rc;
  }

  rc =  checkPrecision(intermediate,
		       sourceLen,
                       sourceType,
		       sourcePrecision,
                       targetScale,
		       targetType,
		       targetPrecision,
                       targetScale,
		       heap,
		       diagsArea,
                       flags);
  }
    
  return rc;
}


//////////////////////////////////////////////////////////////////
// function to convert a signed BIN (of 2, 4 or 8 bytes) to
// a signed BIN (of 2, 4 or 8 bytes), with division by a
// scaling factor
//
// This is useful when overflows and truncations from scaling
// need to be captured; but it also works with the diagsArea
// error model.
//
// Returns ex_expr::EXPR_OK if (conversion was successful) or (a
// conversion error occurred and the data conversion error flag
// is present).
//
// Returns ex_expr::EXPR_ERROR if (a conversion error occurred) and
// (no data conversion error flag is present).
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convBinToBinScaleDiv(
  char *target,
  short targetType,
  Lng32 targetLen,
  Lng32 targetPrecision, 
  Lng32 targetScale, 
  char *source,
  short sourceType,
  Lng32 sourceLen,
  Lng32 sourcePrecision,
  Int64 scaleFactor,
  CollHeap *heap,
  ComDiagsArea** diagsArea,
  Lng32 *dataConversionErrorFlag,
  ULng32 flags) 
{

Lng32 tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_OK; // assume success
ex_expr::exp_return_type rc = ex_expr::EXPR_OK;

// widen source to Int 64
Int64 intermediate;

switch (sourceLen) 
  {
  case SQL_SMALL_SIZE:
    intermediate = *(short *)source;
    break;
  case SQL_INT_SIZE:
    intermediate = *(Lng32 *)source;
    break;
  case SQL_LARGE_SIZE:
    intermediate = *(Int64 *)source;
    break;
  default:
    // shouldn't happen
    intermediate = 0;
    break;
  }
assert (sourceType >= REC_MIN_INTERVAL && sourceType <= REC_MAX_INTERVAL &&
         targetType >= REC_MIN_INTERVAL && targetType <= REC_MAX_INTERVAL);

// divide by the scaleFactor, checking to see if significant
// truncation occurred

Int64 intermediate2 = intermediate / scaleFactor;
Int64 intermediate3 = intermediate2 * scaleFactor;

if (dataConversionErrorFlag)
  {
  
  if (intermediate3 < intermediate)
    {
    // truncation occurred; result was rounded down
    // (can happen only if intermediate is positive)
    tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
    }
  else if (intermediate3 > intermediate)
    {
    // truncation occurred; result was rounded up
    // (can happen only if intermediate is negative)
    tempDataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
    }
  }

else
  {
  // scale truncation occurred - raise error
    if (intermediate3 != intermediate) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                            source, sourceLen, sourceType, 0, 
                            targetType, flags);
      return ex_expr::EXPR_ERROR;
    }
  }

  intermediate = intermediate2;  

// now move converted intermediate to target

  if (targetLen == SQL_LARGE_SIZE)
  {
    *(Int64 *)target = intermediate;  // yeah, it's an extra move
    if (dataConversionErrorFlag)
      *dataConversionErrorFlag = tempDataConversionErrorFlag;
    if (((sourceType >= REC_MIN_INTERVAL) &&
        (sourceType <= REC_MAX_INTERVAL) &&
        (targetType >= REC_MIN_INTERVAL) &&
        (targetType <= REC_MAX_INTERVAL)) &&
        (getIntervalStartField (sourceType) < 
         getIntervalStartField (targetType) ||
	 sourcePrecision > targetPrecision  )) // truncation is possible
        {
          rc = checkPrecision(intermediate,
			      sourceLen,
			      sourceType,
			      sourcePrecision,
			      targetScale,
			      targetType,
			      targetPrecision,
			      targetScale,
			      heap,
			      diagsArea,
                              flags);
        }
  }
  else 
  {
    short physicalTargetType = (short) REC_BIN16_SIGNED;
    ConvInstruction index = CONV_BIN64S_BIN16S;

    if (targetLen == SQL_INT_SIZE)
    {
      physicalTargetType = (short) REC_BIN32_SIGNED;
      index = CONV_BIN64S_BIN32S;
    }

    if (targetLen == SQL_INT_SIZE)
      physicalTargetType = (short) REC_BIN32_SIGNED;
      

    // In this convDoIt, we're purposely passing in 0 for target precision
    // because we don't want this convDoIt to check for precision validity
    // since this call to convDoIt is converting 2 binary operands, and not
    // intervals.  checkPrecision is called after this convDoIt with the correct
    // interval types
    rc = convDoIt((char *) &intermediate, 
		SQL_LARGE_SIZE,
		(short) REC_BIN64_SIGNED,
		sourcePrecision, 
		0, // sourceScale
		target,
		targetLen,
                physicalTargetType, 
		0,  // target precision
		0, // targetScale,
		NULL, // varCharLen
		0,    // varCharLenSize
		heap,
		diagsArea,
                index,
                dataConversionErrorFlag,
                flags | CONV_INTERMEDIATE_CONVERSION);

    // if there was no error on the second conversion,
    // then report back any error from the first conversion
    // (see the discussion in convDoIt() case CONV_LARGEDEC_BIN16S
    // for a proof of why this is the correct thing to do)
    if (dataConversionErrorFlag)
    {
      if (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_OK)
        *dataConversionErrorFlag = tempDataConversionErrorFlag;
    }
    if (rc != ex_expr::EXPR_OK)
      return rc;
    
    rc = checkPrecision(intermediate,
			sourceLen,
                        sourceType,
                        sourcePrecision,
                        targetScale, 
                        targetType,
                        targetPrecision,
                        targetScale,
                        heap,
                        diagsArea,
                        flags);

    
  }
  return rc;
}


//////////////////////////////////////////////////////////////////
// function to convert an Int64  to an ASCII string
// Trailing '\0' is not set!
//
// For fixed char targets, left pad fillers if leftPad is 
// TRUE, or right pad fillers (default mode) otherwise.
//
// convDoIt sets leftPad to TRUE if callers pass in a 
// CONV_UNKNOWN_LEFTPAD to convDoIt.
//
// In only a few cases of fixed char, leftPad will be set to TRUE.  
// e.g., caller wants to convert 7 -> 07        as in month -> ascii
//                           or  8 -> '    8'   as in sqlci display
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convInt64ToAscii(char *target,
					  Lng32 targetLen,
                                          Lng32 targetPrecision, // max. characters
                                          Lng32 targetScale,
					  Int64 source,
					  Lng32 scale,
					  char * varCharLen,
					  Lng32 varCharLenSize,
					  char filler,
					  NABoolean leadingSign,
                                          NABoolean leftPad,
                                          NABoolean srcIsUInt64,
					  CollHeap *heap,
					  ComDiagsArea** diagsArea) {

  Lng32 digitCnt = 0;
  ULng32 flags = 0;
  NABoolean negative = (srcIsUInt64 ? FALSE : (source < 0));
  NABoolean fixRightMost  = FALSE;  // True if need to fix the rightmost digit.
  
  Int16 trgType;
  if (varCharLenSize)
    trgType = REC_BYTE_V_ASCII;
  else
    trgType = REC_BYTE_F_ASCII;

  Lng32 padLen = targetLen;
  Lng32 targetChars = targetLen;
  Lng32 requiredDigits = 0;
  Lng32 leftMost;   // leftmost digit.
  Lng32 rightMost;  // rightmost digit.
  Lng32 sign = 0;

  //  Int64 newSource = (negative ? -source : source);
  UInt64 newSource = 0;

  if (targetPrecision)
    {
      // target has a max. number of characters which may be smaller than
      // the target length
      targetChars = targetPrecision;
      padLen      = targetPrecision;
      assert(targetLen >= targetPrecision);
    }

  if ((negative) && (source == 0x8000000000000000LL)) // = -2 ** 63
    {
      newSource = 0x7fffffffffffffffLL;
      //             123456789012345
      digitCnt = 19;
      fixRightMost = TRUE;
    }
  else
    {
      newSource = (UInt64) (negative ? -source : source);
      digitCnt = getDigitCount(newSource);
    }

  if (leadingSign || negative) {
    sign = 1;
    padLen--;
  }
  // No truncation allowed.
  requiredDigits = digitCnt;
  // Add extra zero's.
  if (scale > requiredDigits)
    requiredDigits += (scale - requiredDigits);
  padLen -= requiredDigits;
  if (scale)
    padLen--; // decimal point
  if (padLen < 0) {
    // target string is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
                          (char*)&source,
                          sizeof(Int64), REC_BIN64_SIGNED, scale, trgType,
                          flags,
                          targetLen, targetScale,
                          targetPrecision);
    return ex_expr::EXPR_ERROR;   
  } 
  
  if (varCharLenSize) {
    // we do not pad. Instead, we adjust the targetLen
    leftPad = FALSE;
    targetChars -= padLen;
    targetLen = targetChars;
    padLen = 0;
  }
  else if (targetChars < targetLen) {
    // Fill out the unused bytes after targetChars with blanks.
    str_pad(&target[targetChars], targetLen-targetChars, ' ');
  }

  if (leftPad) { 
    leftMost = padLen + sign;  
  }
  else {
    leftMost = sign;
  }

  Lng32 currPos;
  // Add filler.
  rightMost = currPos = targetChars - 1; 
  if (padLen) {
    Lng32 start; 
    if (leftPad) { // Pad to the left. 
      start = sign;
    }
    else { // Pad to the right
      start = targetChars - padLen;
      rightMost = currPos = start - 1;
    }
    str_pad(&target[start], padLen, filler);
  }

  // Convert the fraction part and add decimal point.
  if (scale) {
    Lng32 low = (currPos - scale);
    for (; currPos > low; currPos--) {
      target[currPos] = (char)((newSource % 10) + '0');
      newSource /= 10;
    }
    target[currPos--] = '.';
  }

  // Convert the integer part.
  for (; currPos >= leftMost; currPos--) {
    target[currPos] = (char)((newSource % 10) + '0');
    newSource /= 10;
  }

  // Add sign.
  if (leadingSign) {
    if (negative)
      target[0] = '-';
    else 
      target[0] = '+';
  }
  else if (negative) 
      target[currPos] = '-';

  // Fix the rightmost digit for -2 ** 63.
  if (fixRightMost && target[rightMost] == '7')
    target[rightMost] = '8';

  if (newSource != 0 || currPos < -1)
    { // Sanity check fails.
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
                            (char*)&source,
                            sizeof(Int64), REC_BIN64_SIGNED, scale, trgType,
                            flags, targetLen, targetScale);
      return ex_expr::EXPR_ERROR;   
    }

  // Set varchar length field for varchar.
  if (varCharLenSize)
    if (varCharLenSize == sizeof(Lng32))
      str_cpy_all(varCharLen, (char *) &targetLen, sizeof(Lng32));
    else {
      short VCLen = (short) targetLen;
      str_cpy_all(varCharLen, (char *) &VCLen, sizeof(short));
    };

  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert an FLOAT64  to an ASCII string
// Trailing '\0' is not set!
// This routine assumes that targetLen is at least
// SQL_REAL_MIN_DISPLAY_SIZE:
// 1 byte sign
// 1 byte for digit in front of decimal point
// 1 byte decimal point
// 1 byte for at least one digit after decimal point
// 5 bytes for exponent (E+DDD)
///////////////////////////////////////////////////////////////////
short convFloat64ToAscii(char *target,
			Lng32 targetLen,
                        Lng32 targetPrecision, // max. characters
                         Lng32 targetScale,
			double source,
			// maximum # of fraction digits
			Lng32 digits,
			char * varCharLen,
			Lng32 varCharLenSize,
			NABoolean leftPad) {

  short err = 0;

  Lng32 displaySize = digits + 8; // Mantissa = digits + 3, E = 1, Exponent = 4
  Lng32 targetChars = targetLen;
  assert(displaySize <= SQL_DOUBLE_PRECISION_DISPLAY_SIZE);
  char tempTarget[SQL_DOUBLE_PRECISION_DISPLAY_SIZE + 1];
  //char format[8];

  if (targetPrecision)
    {
      // target allows fewer characters than targetLen
      assert(targetLen >= targetPrecision);
      targetChars = targetPrecision;
    }

  // the fraction has always between 1 and "digits" digits
  if ((targetChars - 8) < digits)
    {
      digits = targetChars - 8;
      if (digits < 1)
        return -1;
    }

  Lng32 usedTargetLen = MINOF(displaySize, targetChars);

    if (isinf(source)) {
      source = 0;
    }

  double absSource = source;
  NABoolean neg = FALSE;
  if (source < 0)
    {
      absSource = -source;
      neg = TRUE;
    }

  Int64 expon = 0;
  Int64 intMantissa = 0;
  NABoolean expPos = TRUE;
  if (absSource > 0)
    {
      double logTen = MathLog10(absSource, err);
      if (err)
	return -1;

      if (logTen >= 0)
	{
	  expPos = TRUE;
	}
      else
	{
	  logTen = -logTen;
	  expPos = FALSE;
	};
      
      // replace with a faster way below (4 lines)
//      while (logTen > 0)
//	{
//	  expon++;
//	  logTen -= 1;
//	}
      expon = (Int32) logTen;
      logTen -= expon;
      if (logTen > 0.0)
        expon++;
      
      if ((expPos) && (logTen != 0))
	expon--;

      NABoolean reduceExpon = FALSE;
      short reduceExponBy = 0;
      if (expon >= DBL_MAX_10_EXP)
	{
	  // if expon is greater than MAX exponent allowed, then reduce it 
	  // the diff between expon and DBL_MAX_10_EXP.
	  // This is needed so the next MathPow call doesn't return
	  // an error when it tries to do   10 ** DBL_MAX_10_EXP
	  // (which will make it greater than the max double value).
	  reduceExponBy = (short)(expon - DBL_MAX_10_EXP + 1);
	  expon -= reduceExponBy;
	  reduceExpon = TRUE;
	}
      double TenPowerExpon = 
	((expPos == FALSE) ? MathPow(10.0, (double)expon, err) : MathPow(10.0, (double)-expon, err));
      if (err)
	return -1;

      if (isinf(TenPowerExpon))
         return -1;
      double mantissa = absSource * TenPowerExpon;
      
      if (reduceExpon)
	{
	  // now fix mantissa by multiplying or dividing by 10.
          double tempMathPow = MathPow(10.0, reduceExponBy, err);
          if (isinf(tempMathPow))
             return -1;
	  if (expPos == FALSE)
	    mantissa = mantissa * tempMathPow;
	  else
	    mantissa = mantissa / tempMathPow;

	  if (err)
	    return -1;

	  // and increase expon to its original value
	  expon += reduceExponBy;
	}


      // The multiplication and casting to an Int64 below has caused several
      // problems on Linux.  Performing the multiplication and casting to Int64
      // on seperate lines seems to fix this problem.
      double doubleIntMantissa = MathPow(10.0,(double)digits,err);
      if (isinf(doubleIntMantissa))
         return -1;
      doubleIntMantissa = mantissa * doubleIntMantissa;


      if (err)
	return -1;

      intMantissa = (Int64)doubleIntMantissa;
    }

  short error;
  error =
    convInt64ToAscii(tempTarget, digits+3, 0, targetScale,
                     (neg ? -intMantissa : intMantissa),
		     digits, NULL, 0, ' ',
		     neg, TRUE, FALSE, NULL, NULL);
  if (error)
    return -1;

  // If the mantissa is 0, *or* if the digit before the decimal point is still
  // a space char (i.e. mantissa is < 0), then be sure to initialize the digit
  // to 0 - callers are dependent on the fact that this space is initialized.

  if ((intMantissa == 0) || (tempTarget[1] == ' '))
    {
      // add a 0 before the decimal point of mantissa
      tempTarget[1] = '0';
    }

  tempTarget[digits+3] = 'E';
  error =
    convInt64ToAscii(&tempTarget[digits+4], 4, 0, targetScale,
                     (expPos ? expon : -expon), 
		     0, NULL, 0, '0',
		     TRUE, TRUE, FALSE, NULL, NULL);
  if (error)
    return -1;

  char *pch = tempTarget;
  while (*pch == ' ') {
    usedTargetLen--;
    pch++;
  }

  if (varCharLenSize) {
    // the target is a varChar. Just move the data left adjusted and
    // set the length field.
    str_cpy_all(target, pch, usedTargetLen);

    if (varCharLenSize == sizeof(Lng32))
      str_cpy_all(varCharLen, (char *) &usedTargetLen, sizeof(Lng32));
    else {
      short VCLen = (short) usedTargetLen;
      str_cpy_all(varCharLen, (char *) &VCLen, sizeof(short));
    };
  }
  else {
    // if target is larger than usedTargetLen, fill in blanks.
    Lng32 padLen = targetLen - usedTargetLen;
    if (leftPad) {
      str_pad(target, padLen, ' ');
      str_cpy_all(&target[padLen], pch, usedTargetLen);
    }
    else {
      str_cpy_all(target, pch, usedTargetLen);
      str_pad(&target[usedTargetLen], padLen, ' ');
    } 
  };
  return 0;
}

//////////////////////////////////////////////////////////////////
// function to convert an Int64  to a Big Num
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convInt64ToBigNum(char *target,
                                           Lng32 targetLen,
                                           Int64 source,
					   NAMemory *heap,
					   ComDiagsArea** diagsArea,
                                           ULng32 flags) {

  short retCode = BigNumHelper::ConvInt64ToBigNumWithSignHelper(targetLen,
                                                                source,
                                                                target,
                                                                FALSE);
  if (retCode == -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,(char*)&source,
                          sizeof(Int64), REC_BIN64_SIGNED, 0, REC_NUM_BIG_SIGNED,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert a UInt64 to a Big Num
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convUInt64ToBigNum(char *target,
                                            Lng32 targetLen,
                                            UInt64 source,
                                            NAMemory *heap,
                                            ComDiagsArea** diagsArea,
                                            ULng32 flags) {

  short retCode = BigNumHelper::ConvInt64ToBigNumWithSignHelper(targetLen,
                                                                source,
                                                                target,
                                                                TRUE);
  if (retCode == -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,(char*)&source,
                          sizeof(Int64), REC_BIN64_UNSIGNED, 0, REC_NUM_BIG_SIGNED,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert BIGNUM to LARGEDEC
///////////////////////////////////////////////////////////////////

ex_expr::exp_return_type convBigNumToLargeDec(char *target,
		                              Lng32 targetLen,
                                              char *source,
                                              Lng32 sourceLen,
                                              NAMemory *heap,
                                              ComDiagsArea** diagsArea,
                                              ULng32 flags) {

  // Convert the Big Num (with sign) into a BCD representation by calling 
  // a BigNumHelper method
  short retCode = BigNumHelper::ConvBigNumWithSignToBcdHelper(sourceLen,
			                                      targetLen,
			                                      source,
			                                      target,
                                                              heap);
  if (retCode == -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                          sourceLen, REC_NUM_BIG_SIGNED, 0,
                          REC_DECIMAL_LSE, flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;

}


//////////////////////////////////////////////////////////////////
// function to convert a LARGEDEC  to an ASCII string
// Trailing '\0' is not set!
//
// For fixed char target, left pad blanks if leftPad is TRUE, or
// right pad blanks otherwise.
//
// For varchar target, left-justify string without blank pads 
// to the right.
//
// convDoIt sets leftPad to TRUE if callers pass in a 
// CONV_UNKNOWN_LEFTPAD to convDoIt.
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convLargeDecToAscii(char *target,
					     Lng32 targetLen,
                                             Lng32 targetPrecision, // max chars
					     char *source,
					     Lng32 sourceLen,
					     Lng32 sourceScale,
					     char * varCharLen,
					     Lng32 varCharLenSize,
					     NABoolean leftPad,
					     CollHeap *heap,
					     ComDiagsArea** diagsArea) {

  ULng32 flags = 0;
  Lng32 targetLenInChars = ( targetPrecision ? targetPrecision : targetLen );
  Int16 trgType;
  if (varCharLenSize)
    trgType = REC_BYTE_V_ASCII;
  else
    trgType = REC_BYTE_F_ASCII;

  if(source[0] < 2)
    {
      unsigned short realSource[256];
      str_cpy_all((char *)realSource, source, sourceLen);

      if(realSource[0]) source[0] = '-';
      else source[0] = '+';

      Int32 realLength = 1+(sourceLen-2)/5;
      for(Int32 srcPos=sourceLen-1; srcPos; srcPos--)
	{
	  ULng32 r = 0;
	  for(Int32 i=1; i<=realLength; i++)
	    {
	      ULng32 q = (realSource[i] + r) / 10;
	      r = (r + realSource[i]) - 10 * q;
	      realSource[i] = (short)q;
	      r <<= 16;
	    }
	  source[srcPos] = (char)(r >>= 16);
	}
    }

  if (varCharLenSize)
    leftPad = FALSE;

  // skip leading zeros; start with index == 1; index == 0 is sign
  // stop looking one position before the decimal point. This
  // position is sourceLen - sourceScale - 1
  Lng32 currPos = 1;
  while ((currPos < (sourceLen - sourceScale - 1)) && source[currPos] == 0)
    currPos++;

  Lng32 padLen = targetLenInChars;
  if (source[0] == '-')
    padLen--;  
  Lng32 requiredDigits = sourceLen - currPos; // - sourceScale;
  
  padLen -= requiredDigits;

  if (sourceScale)
    padLen--; //decimal point

  if (padLen < 0)
    {
      // target string is not long enough - overflow
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
                            source, sourceLen, REC_DECIMAL_LSE,
                            sourceScale, trgType, flags);
      return ex_expr::EXPR_ERROR;
    }

  Lng32 targetPos = 0;

  // if target is fixed length and leftPad, left pad blanks
  if (leftPad) {
    for (; targetPos < padLen; targetPos++)
      target[targetPos] = ' ';
  }

  // fill in sign
  if (source[0] == '-')
    target[targetPos++] = '-';

  // fill in digits
  Lng32 i = 0;
  for (i = 0; i < (requiredDigits-sourceScale); i++, targetPos++, currPos++)
    target[targetPos] = source[currPos] + '0';

  // if we have a scale, add decimal point and some digits
  if (sourceScale) {
    target[targetPos++] = '.';
    for (i = 0; i < sourceScale; i++, targetPos++, currPos++)
      target[targetPos] = source[currPos] + '0';
  };

  // Right pad blanks for fixed char.
  if (!varCharLenSize)
    while (targetPos < targetLen)
      target[targetPos++] = ' ';

  // set length field for variable length targets
  if (varCharLenSize) {
    if (varCharLenSize == sizeof(Lng32))
      str_cpy_all(varCharLen, (char *) &targetPos, sizeof(Lng32));
    else {
      short VCLen = (short) targetPos;
      str_cpy_all(varCharLen, (char *) &VCLen, sizeof(short));
    };
  };

  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert a BIGNUM  to an ASCII string
// Trailing '\0' is not set!
// 
// This function first converts the BIGNUM to an intermediate
// LARGEDEC, then calls the previous function convLargeDecToAscii() 
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convBigNumToAscii(char *target,
					   Lng32 targetLen,
                                           Lng32 targetPrecision, // max chars
					   char *source,
					   Lng32 sourceLen,
                                           Lng32 sourcePrecision,
					   Lng32 sourceScale,
					   char * varCharLen,
					   Lng32 varCharLenSize,
					   NABoolean leftPad,
					   NAMemory *heap,
					   ComDiagsArea** diagsArea,
                                           ULng32 flags) 
{
  const Int32 tempSpaceLen = 257;   // one extra byte for the sign.
  char  tempIntermediateLargeDec[tempSpaceLen]; 
  char* intermediateLargeDec = tempIntermediateLargeDec;

  // If heap exists, allocate temp through it.  Otherwise use static temp space.
  if (heap)
    intermediateLargeDec = new (heap) char[sourcePrecision + 1]; // + 1 for sign
  else {
    if ( targetLen > tempSpaceLen ) 
       return ex_expr::EXPR_ERROR;
  }

  if (convBigNumToLargeDec(intermediateLargeDec,
		           sourcePrecision + 1, 
		           source,
		           sourceLen,
                           heap,
                           diagsArea,
                           flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK) {
    return ex_expr::EXPR_ERROR;
    }

  ex_expr::exp_return_type retValue = convLargeDecToAscii(target,
			                                  targetLen,
                                                          targetPrecision,
			                                  intermediateLargeDec,
			                                  sourcePrecision + 1,
			                                  sourceScale,
			                                  varCharLen,
			                                  varCharLenSize,
			                                  leftPad,
			                                  heap,
                                                          diagsArea);

  if (heap)
    NADELETEBASIC(intermediateLargeDec, (heap));

  return retValue;
};
    
// convDatetimeToAscii() ============================================
// This function converts datetime values to ASCII string values in
// the DEFAULT format (yyyy-mm-dd hh:mm:ss.msssss).  Only those fields
// present in the datetime value are formated. If the datetime value
// has a fraction portion of the SECOND field, it will be formatted
// according to how much space is available in the destination string
// value.  If the target is a fixed size, available trailing space is
// padded with ' ' (space) characters.
//
// This method has been modified as part of the MP Datetime
// Compatibility project.  It has been modified to handle non-standard
// datetime types and all combinations of conversions.
// ===================================================================
//
ex_expr::exp_return_type convDatetimeToAscii(char *target,
                                             Lng32 targetLen,
                                             Lng32 targetPrecision, // tgt length in char or 0
                                             char *source,
                                             Lng32 sourceLen,
                                             REC_DATETIME_CODE code,
                                             short fractionPrecision,
                                             char * varCharLen,
                                             Lng32 varCharLenSize,
					     NABoolean leftPad,
                                             CollHeap *heap,
                                             ComDiagsArea** diagsArea)
{

  // Declare attributes to make use of ExpDatetime convDatetimeToASCII
  //
  ExpDatetime srcDatetimeOpType;
  Lng32 targetLenInChars = ( targetPrecision ? targetPrecision : targetLen );

  // Setup attribute for the source.
  //
  srcDatetimeOpType.setPrecision(code);
  srcDatetimeOpType.setScale(fractionPrecision);

  // Convert the datetime value to ASCII in the DEFAULT format.
  //
  Lng32 realTargetLen = 
    srcDatetimeOpType.convDatetimeToASCII(source,
                                          target,
                                          targetLenInChars,
                                          ExpDatetime::DATETIME_FORMAT_DEFAULT,
					  NULL,
                                          heap,
                                          diagsArea);

  if (realTargetLen < 0) {
    return ex_expr::EXPR_ERROR;
  }

  // if target is fixed length, leftpad or right pad.
  //
  if ((!varCharLenSize) &&
      (realTargetLen < targetLen))
  {
    if (leftPad && realTargetLen < targetLenInChars)
      {
	// right shift result
	Int32 i;
	for (i = 0; i < realTargetLen; i++)
	  {
	    target[targetLenInChars - (i+1)] = target[realTargetLen - (i+1)]; 
	    //	    target[targetLen - realTargetLen + i] = target[i]; 
	  }

	// and blankpad on the left
	for (i = 0; i < (targetLenInChars - realTargetLen); i++)
	  {
	    target[i] = ' '; 
	  }
        realTargetLen = targetLenInChars;
      }
    // blankpad on the right
    if (realTargetLen < targetLen)
      {
	for (Int32 i = realTargetLen; i < targetLen; i++)
	  target[i] = ' '; 
      }
  }

  // set length field for variable length targets
  //
  if (varCharLenSize) {
    if (varCharLenSize == sizeof(Lng32)) {
      str_cpy_all(varCharLen, (char *) &realTargetLen, sizeof(Lng32));
    } else {
      short VCLen = (short) realTargetLen;
      str_cpy_all(varCharLen, (char *) &VCLen, sizeof(short));
    }
  }

  return ex_expr::EXPR_OK;
}

// convAsciiToDatetime() ============================================
// This function converts an ASCII string in any of the three
// (DEFAULT, EUROPEAN, or USA) formats, to the given datetime type.
// The string must have the same fields as the given datetime type.
// If the string has a fractional portion of the SECOND field and the
// datetime type has no fractional precision, the fraction portion of
// the string is ignored.  If the datetime type has a fractional
// precision and the string has no fraction protion, then the fraction
// is set to zero.  If the string has a fraction portion and the
// datetime type has a fractional precision, then the fraction portion
// of the string is scaled (up or down) to match the datetime type.
//
// This method has been modified as part of the MP Datetime
// Compatibility project.  It has been modified to handle non-standard
// datetime types and all combinations of conversions.
//
// This method has been modified again as an interface to call
// methods in expDatetime class as part of the effort to improve
// IMPORT conversion performance.
// ===================================================================
//
ex_expr::exp_return_type convAsciiToDatetime(char *target,
                                             Lng32 targetLen,
                                             REC_DATETIME_CODE code,
                                             short fractionPrecision,
                                             char *source,
                                             Lng32 sourceLen,
                                             CollHeap *heap,
                                             ComDiagsArea** diagsArea,
					     ULng32 flags)
{

  // Declare attributes to make use of ExpDatetime convAsciiToDatetime
  //
  ExpDatetime dstOpType;
  short ret;

  // Setup attribute for the destination.
  //
  dstOpType.setPrecision(code);
  dstOpType.setScale(fractionPrecision);

  ret = dstOpType.convAsciiToDatetime(source,
                                      sourceLen,
                                      target,
                                      targetLen,
                                      ExpDatetime::DATETIME_FORMAT_NONE,
                                      heap,
                                      diagsArea,
                                      flags);
  
  if (ret < 0)
    return ex_expr::EXPR_ERROR;
  
  return ex_expr::EXPR_OK;
  
}

ex_expr::exp_return_type convUnicodeToDatetime(char *target,
					 Lng32 targetLen,
					 REC_DATETIME_CODE code,
					 short fractionPrecision,
					 char *source,    // actually is NAWchar *
					 Lng32 sourceLen, // source length in bytes
					 CollHeap *heap,
					 ComDiagsArea** diagsArea
					     )
{
   const NAWcharBuf wBuf((NAWchar*)source, sourceLen/BYTES_PER_NAWCHAR, heap);
   charBuf *cBuf = NULL;

   cBuf = unicodeToISO88591(wBuf, heap, cBuf);

   if (cBuf) {
      Int32 convertedLen = cBuf -> getStrLen();

      if ( convertedLen == sourceLen/BYTES_PER_NAWCHAR ) {

         ex_expr::exp_return_type ok = 
			convAsciiToDatetime(target,
					    targetLen,
					    code,
					    fractionPrecision,
					    (char*)cBuf->data(),
					    cBuf->getStrLen(),
					    heap,
					    diagsArea,
					    0);

         NADELETE(cBuf, charBuf, heap);
 
         return ok;

      }
   }

   char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
   ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR, NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr) , source, sourceLen ));

   return ex_expr::EXPR_ERROR;

}

// convDatetimeDatetime() ============================================
// This function supports any datetime to datetime conversions with
// missing leading fields coming from the current timestamp and
// missing trailing fields being padded with their minimum value (1
// for date fields and 0 for time fields).  Note that the compiler
// (type synthesis) only allows conversions in which the source and
// destination share some fields.  If the dataConversionErrorFlag is
// non-NULL and data is lost when scaling the fractional portion of
// the source value to match the destination fractional precision,
// then the dataConversionErrorFlag is set to
// CONV_RESULT_ROUNDED_DOWN.
//
// This method has been modified as part of the MP Datetime
// Compatibility project.  It has been modified to handle non-standard
// datetime types and all combinations of conversions.
// ===================================================================
//
ex_expr::exp_return_type convDatetimeDatetime(char * target,
                                              Lng32 targetLen,
                                              REC_DATETIME_CODE targetCode,
                                              Lng32 targetScale,
                                              char * source,
                                              Lng32 sourceLen,
                                              REC_DATETIME_CODE sourceCode,
                                              Lng32 sourceScale,
                                              CollHeap *heap,
                                              ComDiagsArea** diagsArea,
					      short validateFlag,
                                              Lng32 *dataConversionErrorFlag) {

  if (dataConversionErrorFlag)
    // assume success
    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_OK;

  // Declare attributes to make use of ExpDatetime convDatetimeDatetime
  //
  ExpDatetime srcDatetimeOpType;

  // Setup attribute for the source.
  //
  srcDatetimeOpType.setPrecision(sourceCode);
  srcDatetimeOpType.setScale((short)sourceScale);


  rec_datetime_field dstStartField;
  rec_datetime_field dstEndField;

  // Get the start and end fields of the given Datetime type.
  //
  if (ExpDatetime::getDatetimeFields(targetCode,
                                     dstStartField,
                                     dstEndField) != 0) {
    ExRaiseSqlError(heap, diagsArea, EXE_INTERNAL_ERROR);
    return ex_expr::EXPR_ERROR;
  }
  
 // init variable roundedDown to FALSE.
 // case 10-020917-7718 RG: Build MX020910, Select incorrect rows with
 // param '00:00:10' in predicate.
 //
 // With optimization turned on (c89, level 2), this variable is not initialized.
 // Consequently, it can take a value which is not 0 (TRUE). Since this flag may not
 // get set inside srcDatetimeOpType.convDatetimeDatetime(), this var
 // maintains this random value after the call. This incorrectly sets the
 // dataConversionErroFlag to ex_conv_clause::CONV_RESULT_ROUNDED_DOWN, and can turn 
 // off the range-serach exclusion flag. As a result, more rows are turned.
 //
  NABoolean roundedDown = FALSE;

  // Convert the source datetime value to the destination datetime
  // type.
  //
  if (srcDatetimeOpType.convDatetimeDatetime(source,
                                             dstStartField,
                                             dstEndField,
                                             (short)targetScale,
                                             target,
                                             targetLen,
                                             validateFlag,
                                             &roundedDown) != 0) {

    char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
    return ex_expr::EXPR_ERROR;
  }

  // roundedDown is TRUE when data is lost when scaling the source
  // fractional portion of the SECOND field to match the destination
  // fractional precision.
  //
  if (roundedDown == TRUE && dataConversionErrorFlag)
    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;

  return  ex_expr::EXPR_OK;
};

///////////////////////////////////////////////////////////////////
// function to convert an ASCII string to double
// The function assumes that source is at least
// sourceLen long. Trailing '\0' is not recongnized
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiToFloat64(char * target,
					    char *source,
					    Lng32 sourceLen,
					    CollHeap *heap,
					    ComDiagsArea** diagsArea,
                                            ULng32 flags) {
  short err = 0;

  double ptarget;

  // skip leading and trailing blanks and adjust source and sourceLen
  // accordingly
  Lng32 i = 0;
  for (; i < sourceLen && *source == ' '; i++)
    source++;

  if (i == sourceLen) {

    if ((target) && (flags & CONV_TREAT_ALL_SPACES_AS_ZERO))
      {
	ptarget = 0;
	str_cpy_all(target, (char*)&ptarget, sizeof(double));
	return ex_expr::EXPR_OK;
      }

    // string contains only blanks.
    char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
    return ex_expr::EXPR_ERROR;
  };

  sourceLen -= i;

  // we know that we found at least one non-blank character.
  // so we just decrement sourceLen till we scanned all
  // trailing blanks
  while (source[sourceLen - 1] == ' ') {
    sourceLen--;
  };

  enum State {START, SKIP_BLANKS, MANT_BEFORE_SIGN, MANT_AFTER_SIGN,
  EXP_START, EXPONENT, ERROR};
  
  Int32 cp = 0;
  double mantissa = 0;
  double exponent = 0;
  NABoolean negMantissa = FALSE;
  NABoolean negExponent = FALSE;
  Int32 numScale = 0;
  NABoolean validNum = FALSE;

  State state = START;
  NABoolean skipChar;
  while (cp < sourceLen)
    {
      skipChar = FALSE;
      //      cout << "state = " << state << endl;

      switch (state)
	{
	case START:
	  if ((source[cp] == '+') || (source[cp] == '-'))
	    {
	      if (source[cp] == '-')
		negMantissa = TRUE;
	      state = SKIP_BLANKS;
	      skipChar = TRUE;
	    }
	  else
	    state = MANT_BEFORE_SIGN;
	  break;

	case SKIP_BLANKS:
	  if (source[cp] != ' ')
	    state = MANT_BEFORE_SIGN;
	  else
	    skipChar = TRUE;
	  break;

	case MANT_BEFORE_SIGN:
	  if (source[cp] == '.')
	    {
	      state = MANT_AFTER_SIGN;
	    }
	  else if ((source[cp] == 'E') || (source[cp] == 'e'))
	    {
	      validNum = FALSE;
	      state = EXP_START;
	    }
	  else if ((source[cp] < '0') || (source[cp] > '9'))
	    state = ERROR;
	  else
	    {
	      if (safe_add_digit_to_double(mantissa,
					   source[cp] - '0',
					   &mantissa) != 0)
		{
		  ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                        source, sourceLen, REC_BYTE_F_ASCII,
                                        SQLCHARSETCODE_ISO88591,
                                        REC_FLOAT64, flags);
		  return ex_expr::EXPR_ERROR;
		}
	      validNum = TRUE;
	    }
	  skipChar = TRUE;
	  break;

	case MANT_AFTER_SIGN:
	  if ((source[cp] == 'E') || (source[cp] == 'e'))
	    {
	      if (NOT validNum)
		state = ERROR;
	      else
		{
		  validNum = FALSE;
		  state = EXP_START;
		}
	    }
	  else if ((source[cp] < '0') || (source[cp] > '9'))
	    state = ERROR;
	  else
	    {
	      numScale++;
	      if (safe_add_digit_to_double(mantissa,
					   source[cp] - '0',
					   &mantissa) != 0)
		{
		  ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                        source, sourceLen, REC_BYTE_F_ASCII,
                                        SQLCHARSETCODE_ISO88591,
                                        REC_FLOAT64, flags);
		  return ex_expr::EXPR_ERROR;
		}
	      validNum = TRUE;
	    }
	  skipChar = TRUE;
	  break;

	case EXP_START:
	  {
	    if ((source[cp] == '+') || (source[cp] == '-'))
	      {
		if (source[cp] == '-')
		  negExponent = TRUE;
		skipChar = TRUE;
	      }
	    state = EXPONENT;
	  }
	  break;

	case EXPONENT:
	  {
	    if ((source[cp] < '0') || (source[cp] > '9'))
	      state = ERROR;
	    else
	      {
	        if (safe_add_digit_to_double(exponent,
					     source[cp] - '0',
					     &exponent) != 0)
		  {
		    ExRaiseDetailSqlError(heap, diagsArea,
                                          EXE_NUMERIC_OVERFLOW, source,
                                          sourceLen,
                                          REC_BYTE_F_ASCII,
                                          SQLCHARSETCODE_ISO88591,
                                          REC_FLOAT64, flags);
		    return ex_expr::EXPR_ERROR;
		  }
		validNum = TRUE;
	      }
	    skipChar = TRUE;
	  }
	  break;

	case ERROR:
	  {
	    // string contains only blanks.
            char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
	    return ex_expr::EXPR_ERROR;
	  };
	  break;

	default:
	  state = ERROR;
	  break;

	} // switch state

      if ((state != ERROR) && (skipChar))
	cp++;
    } // while

  if (NOT validNum)
    {
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
      return ex_expr::EXPR_ERROR;
    };
    
  double scale = MathPow(10.0, (double)numScale, err);
  if (isinf(scale))
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591, REC_FLOAT64, flags);
      return ex_expr::EXPR_ERROR;
    }
  if (err)
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, REC_BYTE_F_ASCII, 
                            SQLCHARSETCODE_ISO88591,REC_FLOAT64, flags);
      return ex_expr::EXPR_ERROR;
    }

  if (negMantissa)
    mantissa = - mantissa;

  mantissa = mantissa / scale;

  if (negExponent)
    exponent = - exponent;
  exponent = MathPow(10.0, exponent, err);
  if (isinf(exponent))
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, REC_BYTE_F_ASCII, 
                            SQLCHARSETCODE_ISO88591,REC_FLOAT64, flags);
      return ex_expr::EXPR_ERROR;
    }
  if (err)
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, REC_BYTE_F_ASCII, 
                            SQLCHARSETCODE_ISO88591,REC_FLOAT64, flags);
      return ex_expr::EXPR_ERROR;
    }

  short ov;
  ptarget = MathReal64Mul(mantissa, exponent, &ov);
  if (ov)
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591,REC_FLOAT64, flags);
      return ex_expr::EXPR_ERROR;
    }

  if (target)
    {
      str_cpy_all(target, (char*)&ptarget, sizeof(double));
    }
  
  // conversion was OK
  return ex_expr::EXPR_OK;
};

NABoolean isNegative(char *source, Lng32 sourceLen, Lng32 &currPos)
{
  // skip leading blanks and look for leading sign
  NABoolean done = FALSE;
  NABoolean negative = FALSE;
  while ((NOT done) && (currPos < sourceLen))
    {
      if ((source[currPos] == '+') || (source[currPos] == '-'))
        {
          negative = (source[currPos] == '-');
          done = TRUE;
          currPos++; // skip pass sign
        }
      else if (source[currPos] == ' ')
        currPos++;
      else
        done = TRUE;
    }

  return negative;
}

ex_expr::exp_return_type convAsciiToUInt64base(UInt64 &target,
                                           Lng32 targetScale,
                                           char *source,
                                           Lng32 sourceLen,
                                           CollHeap *heap,
                                           ComDiagsArea** diagsArea,
                                           ULng32 flags)
{
  NABoolean SignFound = FALSE;   // did we find a sign (+/-)
  NABoolean DigitsAllowed = TRUE;
  NABoolean negative = FALSE;    // default is a positive value
  NABoolean pointFound = FALSE;  // did we find a decimal point
  Lng32 currPos = 0;              // current position in the string
  short digitCnt = 0;            // digits found so far
  Lng32 sourceScale = 0;          // default is a scale of 0

  target = 0;
  while (currPos < sourceLen)
    {
    if ((source[currPos] >= '0') && (source[currPos] <= '9'))
      { // process digits
      if (!DigitsAllowed)
        {
	// syntax error in the input
        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
        ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

	return ex_expr::EXPR_ERROR;
        }
      digitCnt++;

      // if we've read enough source characters to achieve the needed 
      // targetScale, then stop appending digits to the target value.
      //   They would only be thrown away later.
      if ( !pointFound || sourceScale < targetScale )
	{           // this digit needs to be processed.

        // if we found a decimal point before, another digit increases
        // the source scale
        if (pointFound)
	  sourceScale++;

        Int32 thisDigit = source[currPos] - '0';
        if (digitCnt > 18)
          {
          // check overflow/underflow
          if (target > (ULLONG_MAX / 10))
            { // next power of 10 causes an overflow
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, REC_BYTE_F_ASCII,
                                    SQLCHARSETCODE_ISO88591,
                                    REC_BIN64_SIGNED, flags);
              return ex_expr::EXPR_ERROR;
            }
          target *= 10;
          Int64 tempMax = ULLONG_MAX;
          tempMax -= thisDigit; 
          // if (target > (LLONG_MAX - thisDigit));
          if (target > tempMax)
            { // adding this digit causes an overflow
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, REC_BYTE_F_ASCII,
                                    SQLCHARSETCODE_ISO88591,
                                    REC_BIN64_SIGNED, flags);
              return ex_expr::EXPR_ERROR;
            }
          target = target + (Int64)thisDigit;
          }   // if digitCnt > 18, check overflow or underflow
        else
          {
          // at this point we never consider overflow
          // and target is alway potitive or absolute value
          target = target * 10 + thisDigit;
          }
        }   // fi ( sourceScale < targetScale )
      }
    else if (source[currPos] == ' ')
      { // process blanks
      if (digitCnt || pointFound)	
	// we found already some digits or a decimal point. A blank now 
        // means, that from now on we should not see any digits anymore.
	DigitsAllowed = FALSE;
      }
    else if ((source[currPos] == '+') || (source[currPos] == '-'))
      { // process sign
	// we found already a sign or we found already digits
        // or we found a point already.
        // A sign is an error now!
        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

	return ex_expr::EXPR_ERROR;
      }
    else if (source[currPos] == '.')
      { // process decimal point
      if (pointFound || !DigitsAllowed)    
        {
	// we found a second decimal point. This is an error
        // we are already not allowing anymore digits because of illegal
        // blank space(s)
        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

	return ex_expr::EXPR_ERROR;
        }
      pointFound = TRUE;
      }
    else
      { // process illegal characters
      // if the illegal character is a 'E' or 'e', the input
      // might be a float value. Try to convert the input
      // to double and then to Int64
      if ((source[currPos] == 'E') || (source[currPos] == 'e'))
        {
	  if (currPos == 0)
	    {
	      // 'E' alone is not a valid numeric.
              char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

	      return ex_expr::EXPR_ERROR;
	    }

	  double intermediate;
	  if (convAsciiToFloat64((char*)&intermediate,
				 source,
				 sourceLen,
				 heap,
				 diagsArea,
                                 flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
	    return ex_expr::EXPR_ERROR;

	  // scale the intermediate
	  for (Lng32 i = 0; i < targetScale; i++)
	    intermediate *= 10.0;

	  target = (UInt64) intermediate;

	  return ex_expr::EXPR_OK;
	}
      else
        {
	  // illegal character in this input string
          char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	  ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

	  return ex_expr::EXPR_ERROR;
        }
      }
    currPos++;
    }

  // if we didn't find any digits, it is an error
  if (!digitCnt)
    {
      if ((flags & CONV_TREAT_ALL_SPACES_AS_ZERO) &&
	  (NOT (pointFound || SignFound)))
	{
	  target = 0;
	  return ex_expr::EXPR_OK;
	}
      
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      return ex_expr::EXPR_ERROR;
    }

  // up- or downscale
  if (sourceScale < targetScale)
    {
    for (Int32 i = 0; i < (targetScale - sourceScale); i++)
      {
        if (target > (ULLONG_MAX / 10))
          { // next power of 10 causes an overflow
            ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                  sourceLen, REC_BYTE_F_ASCII,
                                  SQLCHARSETCODE_ISO88591,REC_BIN64_SIGNED,
                                  flags);
            return ex_expr::EXPR_ERROR;
          }
        target *= 10;
      }
    }
  else
    {
    for (Int32 i = 0; i < sourceScale - targetScale; i++)
      target /= 10;
    }
  
  return ex_expr::EXPR_OK;
  }

///////////////////////////////////////////////////////////////////
// function to convert an ASCII string to UInt64
// The function assumes that source is at least
// sourceLen long. Trailing '\0' is not recognized
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiToUInt64(UInt64 &target,
                                           Lng32 targetScale,
                                           char *source,
                                           Lng32 sourceLen,
                                           CollHeap *heap,
                                           ComDiagsArea** diagsArea,
                                           ULng32 flags)
{
  NABoolean negative = FALSE;    // default is a positive value
  Lng32 currPos = 0;              // current position in the string

  negative = isNegative(source, sourceLen, currPos);
  if (negative)
    {
      ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
      return ex_expr::EXPR_ERROR;
    }

  ex_expr::exp_return_type ert = 
    convAsciiToUInt64base(target, targetScale, &source[currPos], 
                          sourceLen - currPos,
                          heap, diagsArea, flags);
  if (ert == ex_expr::EXPR_ERROR)
    return ert;

  return ex_expr::EXPR_OK;
}

ex_expr::exp_return_type convAsciiToInt64(Int64 &target,
					  Lng32 targetScale,
					  char *source,
					  Lng32 sourceLen,
					  CollHeap *heap,
					  ComDiagsArea** diagsArea,
                                          ULng32 flags)
{
  Lng32 currPos = 0;              // current position in the string

  NABoolean negative = FALSE;    // default is a positive value
  negative = isNegative(source, sourceLen, currPos);

  UInt64 tempTgt = 0;
  ex_expr::exp_return_type ert = 
    convAsciiToUInt64base(tempTgt, targetScale, &source[currPos], 
                          sourceLen - currPos,
                          heap, diagsArea, flags);
  if (ert == ex_expr::EXPR_ERROR)
    return ert;
  UInt64 maxLongPlus1 = LLONG_MAX ;
  maxLongPlus1 ++; // min 64bit long integer is -9223372036854775808
                   // max 64bit long integer is 9223372036854775807
                   // so if negative value convert to non-negative value, should check with LLONG_MAX + 1
  if ((tempTgt > LLONG_MAX && NOT negative) || (tempTgt > maxLongPlus1) )
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                            source, sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591,
                            REC_BIN64_SIGNED, flags);
      return ex_expr::EXPR_ERROR;
    }

  if (NOT negative)
    {
      target = (Int64)tempTgt;
      return ex_expr::EXPR_OK;
    }
  /* remove below code according to discussion in github
   * https://github.com/apache/trafodion/pull/706
   * with above validation, below checking is no longer needed
   * comment out
  
  if (-(Int64)tempTgt < LLONG_MIN)
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                            source, sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591,
                            REC_BIN64_SIGNED, flags);
      return ex_expr::EXPR_ERROR;
    }
  */
  target = - (Int64)tempTgt;

  return ex_expr::EXPR_OK;
}

//////////////////////////////////////////////////////////////////
// function to convert an Int64  to Decimal
///////////////////////////////////////////////////////////////////

ex_expr::exp_return_type convInt64ToDec(char *target,
					Lng32 targetLen,
					Int64 source,
					CollHeap *heap,
					ComDiagsArea** diagsArea) {
  ULng32 flags = 0;
  NABoolean negative = (source < 0);
  Lng32 currPos = targetLen - 1;

  if (negative && (currPos >= 0)) {
    if (source == LLONG_MIN) {
      // before we can convert this to a positive number, we have to
      // work on the first digit. Otherwise, we would cause an overflow.
      Int32 temp = (Int32)(source % 10);
      target[currPos--] =  (char)('0' + (temp < 0 ? -temp: temp));
      source /= 10;
    };
    // now make source positive
    source = -source;
  };

  while (source != 0) {
    if (currPos < 0) {
      // target is not long enough - overflow
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
        (char*)&source,
        sizeof(Int64), REC_BIN64_SIGNED, 0, REC_DECIMAL_LSE, flags);
      return ex_expr::EXPR_ERROR;
    };

    target[currPos--] = '0' + (char)(source % 10);
    source /= 10;
  };
  
  // zero pad the leading spaces
  while (currPos >= 0)
    target[currPos--] = '0';
  
  if (negative)
    target[0] |= 0200;

  return ex_expr::EXPR_OK;
}

///////////////////////////////////////////////////////////////////
// function to convert an ASCII string to DEC.
// Conversion is ASCII -> DEC, and caller has to pass
// &target[0], targetLen
// Also, this function always sets the sign bit for DEC if the
// source is negative. 
// The function assumes that source is at least
// sourceLen long. Trailing '\0' is not recongnized
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiToDec(char *target,
					Lng32 targetType,
					Lng32 targetLen,
					Lng32 targetScale,
					char *source,
					Lng32 sourceLen,
					char offset,
					CollHeap *heap,
					ComDiagsArea** diagsArea,
                                        ULng32 flags) {

  NABoolean negative = FALSE;      // default is a positive value
  Lng32 sourceStart = 0;            // start of source after skipping 0 and ' '
  Lng32 sourceScale = 0;            // by default the scale is 0
  Lng32 targetPos = targetLen - 1;  // current positon in the target

  // skip leading blanks
  while ((sourceStart < sourceLen) && (source[sourceStart] == ' '))
    sourceStart++;

  // only blanks found, error
  if (sourceStart == sourceLen) {
    if (flags & CONV_TREAT_ALL_SPACES_AS_ZERO)
      {
	// pad the target with zeros
	while (targetPos >= 0)
	  target[targetPos--] = '0' - offset;
	
	return ex_expr::EXPR_OK;
      }
 
    char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

    return ex_expr::EXPR_ERROR;
  };

  // skip trailing blanks. We know that we found already some
  // non-blank character, thus sourceLen is always > sourceStart
  while (source[sourceLen - 1] == ' ')
    sourceLen--;

  // if the string contains 'e' or 'E' it actually represents
  // a float value. Do a ASCII -> DOUBLE -> DEC
  // use a for-loop to find the 'e'. If we find one, we do the
  // described conversion and return. If we do not find one,
  // we go on with this function.
  // Also, start at the end of the string, if we have an 'e' it
  // is probably closer to the end.
  for (Lng32 i = sourceLen - 1; i >= sourceStart; i--) {
    if (source[i] == 'E' || source[i] == 'e') {
      // found a float representation.

      double intermediate;
      if (convAsciiToFloat64((char*)&intermediate,
			     &source[sourceStart],
			     sourceLen - sourceStart,
			     heap,
			     diagsArea,
                             flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
	return ex_expr::EXPR_ERROR;

      // scale the intermediate
      for (Lng32 j = 0; j < targetScale; j++) {
	intermediate *= 10.0;
 
	if ((intermediate < LLONG_MIN) || (intermediate > LLONG_MAX)) {
	  ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, REC_BYTE_F_ASCII,
                                SQLCHARSETCODE_ISO88591,
                                REC_DECIMAL_UNSIGNED, flags);
	  return ex_expr::EXPR_ERROR;
	};
      }

      if (convInt64ToDec(target,
			 targetLen,
			 (Int64) intermediate,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
	return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
  }
  
  // the string does not represent a float value. Go on with
  // the processing
  Lng32 sourcePos = sourceLen - 1;  // current position in the string

  // check for sign
  if (source[sourceStart] == '+')
    sourceStart++;
  else if (source[sourceStart] == '-') {
    negative = TRUE;
    sourceStart++;
  };
   
  // skip leading zeros
  while((sourceStart < sourceLen) && (source[sourceStart] == '0'))
    sourceStart++;

  // only zeros found, target is 0
  if (sourceStart == sourceLen) {
    str_pad(target, targetLen, '0' - offset);
    return ex_expr::EXPR_OK;
  };

  // determine the scale of the source
  Lng32 index = sourceStart;
  Lng32 pointPos = -1;
  while ((index < sourceLen) && pointPos < 0) {
    if (source[index] == '.')
      pointPos = index;
    else
      index++;
  };
  if (pointPos >= 0)
    // determine sourceScale
    sourceScale = sourceLen - pointPos - 1;
  
  NABoolean raiseOverflowWarning = FALSE;
    
  // procress digits, start from end
  while ((sourcePos >= sourceStart) && (targetPos >= 0)) {
    // add zeros to adjust scale
    if (targetScale > sourceScale) {
      target[targetPos--] = '0' - offset;
      targetScale--;
    }
    else if (targetScale < sourceScale) {
      // skip source digits
      // but at least one of the digits skipped is not a '0', then 
      // a EXE_NUMERIC_OVERFLOW warning needs to be raised
      if (source[sourcePos] != '0')
        raiseOverflowWarning = TRUE;
      sourcePos--;
      sourceScale--;
    }
    else if (sourcePos == pointPos) {
      // simply skip the decimal point
      sourcePos--;
    }
    else {
      // if source is not a digit, we have an error
      if (source[sourcePos] < '0' || source[sourcePos] > '9') {
        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

        return ex_expr::EXPR_ERROR;
      };
      // copy source to target
      target[targetPos--] = source[sourcePos--] - offset;
    };
  };

  if (raiseOverflowWarning)      
    ExRaiseSqlWarning(heap, diagsArea, EXE_NUMERIC_OVERFLOW);

  // we might be right on the decimal point. Skip it before test for
  // overflow
  if (sourcePos == pointPos)
    sourcePos--;

  // if we couldn't copy all digits, we had an overflow
  if (sourcePos >= sourceStart) {
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                          sourceLen, REC_BYTE_F_ASCII,
                          SQLCHARSETCODE_ISO88591, (short)targetType,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  // left pad the target with zeros
  while (targetPos >= 0)
    target[targetPos--] = '0' - offset;

  // add sign
  if (negative)
    target[0] |= 0200;

  return ex_expr::EXPR_OK;
};

///////////////////////////////////////////////////////////////////
// function to convert a DOUBLE to BIGNUM. 
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convDoubleToBigNum(char *target,
                                            Lng32 targetLen,
                                            Lng32 targetType,
                                            Lng32 targetPrecision,
                                            Lng32 targetScale,
                                            double source,
                                            CollHeap *heap,
                                            ComDiagsArea** diagsArea)
{
  SimpleType sourceAttr(REC_FLOAT64, sizeof(double), 0, 0,
                        ExpTupleDesc::SQLMX_FORMAT,
                        8, 0, 0, 0, Attributes::NO_DEFAULT, 0);
  char * opData[2];
  opData[0] = target;
  opData[1] = (char*)&source;
  NABoolean isSigned = (targetType == REC_NUM_BIG_SIGNED);
  BigNum bn(targetLen, targetPrecision, (short)targetScale, isSigned);
  bn.setTempSpaceInfo(ITM_CAST, 0, targetLen);
  if (bn.castFrom(&sourceAttr, opData, heap, diagsArea) != 0)
    {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, 
                            (char*)&source,
                            8, REC_FLOAT64, 0, targetType, 0 /* flags */);
			      
      return ex_expr::EXPR_ERROR; 
    }

  return ex_expr::EXPR_OK;
}

///////////////////////////////////////////////////////////////////
// function to convert an ASCII string to BIGNUM. 
// 
// First convert from ASCII to LARGEDEC, then convert from LARGEDEC
// to BIGNUM
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiToBigNum(char *target,
					   Lng32 targetLen,
					   Lng32 targetType,
                                           Lng32 targetPrecision,
					   Lng32 targetScale,
					   char *source,
					   Lng32 sourceLen,
					   NAMemory *heap,
					   ComDiagsArea** diagsArea,
                                           ULng32 flags) 
  
{
  // if the string contains 'e' or 'E' it actually represents
  // a float value. Do a ASCII -> DOUBLE -> BIGNUM.
  // use a for-loop to find the 'e'. If we find one, we do the
  // described conversion and return. If we do not find one,
  // we go on with this function.
  // Also, start at the end of the string, if we have an 'e' it
  // is probably closer to the end.
  for (Lng32 i = sourceLen - 1; i >= 0; i--) {
    if (source[i] == 'E' || source[i] == 'e') {
      // found a float representation.
      
      // convert ascii to DOUBLE.
      double intermediateDouble;
      if (convDoIt(source, sourceLen, REC_BYTE_F_ASCII, 0, 0,
		   (char*)&intermediateDouble, 8, REC_FLOAT64, 0, 0,
		   NULL, 0, heap, diagsArea) != ex_expr::EXPR_OK)
	return ex_expr::EXPR_ERROR;

      if ((targetType == REC_NUM_BIG_UNSIGNED) &&
	  (intermediateDouble < 0))
	{
	  ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
 	  return ex_expr::EXPR_ERROR;
	}

      // convert DOUBLE to bignum
      SimpleType sourceAttr(REC_FLOAT64, sizeof(double), 0, 0,
			    ExpTupleDesc::SQLMX_FORMAT,
			    8, 0, 0, 0, Attributes::NO_DEFAULT, 0);
      char * opData[2];
      opData[0] = target;
      opData[1] = (char*)&intermediateDouble;
      BigNum bn(targetLen, targetPrecision, (short)targetScale, 
		(targetType == REC_NUM_BIG_UNSIGNED ? 1 : 0));
      bn.setTempSpaceInfo(ITM_CAST, 0, targetLen);
      if (bn.castFrom(&sourceAttr, opData, heap, diagsArea) != 0) {
	ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, 
			      (char*)&intermediateDouble,
			      8, REC_FLOAT64, 0, (short)targetType, flags);
			      
	return ex_expr::EXPR_ERROR; 
      }

      return ex_expr::EXPR_OK;
    }
  } // for

  // Convert from ASCII to an intermediate LARGEDEC, using the function convAsciiToDec(). 
  // To understand this function call, it will be helpful to review the
  // comments in its definition earlier. 
  char * intermediateLargeDec = new (heap) char[targetPrecision + 1]; 
  if (convAsciiToDec(intermediateLargeDec + 1,
		     targetType,
                     targetPrecision,
                     targetScale,
                     source,
                     sourceLen,
		     '0',
                     heap,
                     diagsArea,
                     flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK) {
    NADELETEBASIC(intermediateLargeDec, (heap));
    return ex_expr::EXPR_ERROR;
  }

  if ((targetType == REC_NUM_BIG_UNSIGNED) &&
      (intermediateLargeDec[1] &0200))
    {
      NADELETEBASIC(intermediateLargeDec, (heap));

      ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
      return ex_expr::EXPR_ERROR;
    }

  // Set the sign byte in the intermediate LARGEDEC. 
  if (intermediateLargeDec[1] &0200) {
    // reset the bit
    intermediateLargeDec[1] &= 0177;
    intermediateLargeDec[0] = '-';
  }
  else
    intermediateLargeDec[0] = '+';

  // Convert from the intermediate LARGEDEC to BIGNUM using a BigNumHelper method.
  short retCode = BigNumHelper::ConvBcdToBigNumWithSignHelper(targetPrecision + 1,
			                                      targetLen,
			                                      intermediateLargeDec,
			                                      target);
  NADELETEBASIC(intermediateLargeDec, (heap));

  if (retCode == -1) {
     // target is not long enough - overflow
     ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                           sourceLen, REC_BYTE_F_ASCII, 
                           SQLCHARSETCODE_ISO88591,(short)targetType,
                           flags);
     return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;
}


static rec_datetime_field getIntervalStartField(Lng32 datatype)
{
  switch (datatype) {
  case REC_INT_YEAR:          return REC_DATE_YEAR;
  case REC_INT_MONTH:         return REC_DATE_MONTH;
  case REC_INT_YEAR_MONTH:    return REC_DATE_YEAR;
  case REC_INT_DAY:           return REC_DATE_DAY;
  case REC_INT_HOUR:          return REC_DATE_HOUR;
  case REC_INT_DAY_HOUR:      return REC_DATE_DAY;
  case REC_INT_MINUTE:        return REC_DATE_MINUTE;
  case REC_INT_HOUR_MINUTE:   return REC_DATE_HOUR;
  case REC_INT_DAY_MINUTE:    return REC_DATE_DAY;
  case REC_INT_SECOND:        return REC_DATE_SECOND;
  case REC_INT_MINUTE_SECOND: return REC_DATE_MINUTE;
  case REC_INT_HOUR_SECOND:   return REC_DATE_HOUR;
  case REC_INT_DAY_SECOND:    return REC_DATE_DAY;
  default:
    break;
  }
  return REC_DATE_YEAR;
}

static rec_datetime_field getIntervalEndField(Lng32 datatype)
{
  switch (datatype) {
  case REC_INT_YEAR:          return REC_DATE_YEAR;
  case REC_INT_MONTH:         return REC_DATE_MONTH;
  case REC_INT_YEAR_MONTH:    return REC_DATE_MONTH;
  case REC_INT_DAY:           return REC_DATE_DAY;
  case REC_INT_HOUR:          return REC_DATE_HOUR;
  case REC_INT_DAY_HOUR:      return REC_DATE_HOUR;
  case REC_INT_MINUTE:        return REC_DATE_MINUTE;
  case REC_INT_HOUR_MINUTE:   return REC_DATE_MINUTE;
  case REC_INT_DAY_MINUTE:    return REC_DATE_MINUTE;
  case REC_INT_SECOND:        return REC_DATE_SECOND;
  case REC_INT_MINUTE_SECOND: return REC_DATE_SECOND;
  case REC_INT_HOUR_SECOND:   return REC_DATE_SECOND;
  case REC_INT_DAY_SECOND:    return REC_DATE_SECOND;
  default:
    break;
  }
  return REC_DATE_YEAR;
}

///////////////////////////////////////////////////////////////////
// function to convert interval field ASCII string to Int64
// The function reads at most sourceLen number of characters. 
// Or until it encounters a non-digit character and sets the 
// sourceLen to the actual length of the string read if it is 
// smaller than sourceLen. 
// This function is used for ASCII to INTERVAL conversions only. 
// Blanks and sign are already removed.  
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiFieldToInt64(Int64 &target,
                                               Lng32 targetScale,
                                               char *source,
                                               Lng32 &sourceLen,
                                               CollHeap *heap,
                                               ComDiagsArea** diagsArea,
                                               ULng32 flags)
{
  Lng32 currPos = 0;               // current position in the string
  target = 0;                     // result
  while ((currPos < sourceLen) && ((source[currPos] >= '0') && 
                                   (source[currPos] <= '9')))
  { 
    short thisDigit = source[currPos] - '0';
    if (target > (LLONG_MAX / 10))
    { // next power of 10 causes an overflow
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                           sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591, REC_BIN64_SIGNED,
                           flags);
      return ex_expr::EXPR_ERROR;
    }
    target *= 10;
    if (target > LLONG_MAX - thisDigit)
    { // adding this digit causes an overflow
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                           sourceLen, REC_BYTE_F_ASCII,
                            SQLCHARSETCODE_ISO88591, REC_BIN64_SIGNED,
                           flags);
      return ex_expr::EXPR_ERROR;
    }
    target += thisDigit;
    currPos++;
  }
  if (!currPos)
  {
    // No digits were found
    char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

    return ex_expr::EXPR_ERROR;
  }
  // return the number of digits read
  sourceLen = currPos;
  return ex_expr::EXPR_OK;
};

   
///////////////////////////////////////////////////////////////////
// function to convert an ASCII string to an interval datatype.
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convAsciiToInterval(char *target,
					     Lng32 targetLen,
					     Lng32 targetDatatype,
					     Lng32 leadingPrecision,
					     Lng32 fractionPrecision,
					     char *source,
					     Lng32 sourceLen,
					     NABoolean allowSignInInterval,
					     CollHeap *heap,
					     ComDiagsArea** diagsArea,
                                             ULng32 flags)
{
  // skip leading and trailing blanks and adjust source and sourceLen
  // accordingly
    while ((sourceLen > 0) && (*source == ' '))
  {
    source++;
    sourceLen--;
  }
  
  if (!sourceLen) 
  {
    // string contains no digits 
    ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
    return ex_expr::EXPR_ERROR;
  };

  NABoolean negInterval = FALSE;
  if ((source[0] == '-') || (source[0] == '+')) {
    if (NOT allowSignInInterval)
      {
	// string starts with a sign - not allowed
	ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
	return ex_expr::EXPR_ERROR;
      }
    else
      {
	if (source[0] == '-')
	  negInterval = TRUE;
	source += 1;
	sourceLen -= 1;
      }
  }
  // we know that we found at least one non-blank character.
  // so we just decrement sourceLen till we scanned all
  // trailing blanks
  while (source[sourceLen - 1] == ' ')
    sourceLen--;

  char delimiter[] = "^-^:::";
  unsigned short maxFieldValue[] = { 0, 11, 0, 23, 59, 59 };

  rec_datetime_field start = getIntervalStartField(targetDatatype);
  rec_datetime_field end = getIntervalEndField(targetDatatype);

  // convert the first field
  Int64 intermediate;
  Lng32 fieldLen = leadingPrecision;
  if (fieldLen > sourceLen)
    fieldLen = sourceLen; // so we don't read garbage past end of string

  if (convAsciiFieldToInt64(intermediate,
		            0, // targetScale
                            source,
                            fieldLen,
                            heap,
                            diagsArea,
                            flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
    return ex_expr::EXPR_ERROR;

  Lng32 strIndex = fieldLen;
  Int64 fieldValue;

  for (Int32 field = start+1; field <= end; field++) 
  {
    Int32 index = field - REC_DATE_YEAR;

    // Make sure there is still some string left before we look
    // for the delimiter. The '+1' in the test also makes sure 
    // there is at least one character after the delimiter.
    // Without the '+1', we get a strange string conversion 
    // error, EXE_CONVERT_STRING_ERROR, instead of the more 
    // reasonable interval conversion error, 
    // EXE_CONVERT_INTERVAL_ERROR, on interval strings like 
    // '20-'. Though interval strings like '20-hithere' will 
    // still get EXE_CONVERT_STRING_ERROR.
    if (strIndex + 1 >= sourceLen)
      {
        ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
        return ex_expr::EXPR_ERROR;
      } 

    // get the delimiter preceding this field
    if (source[strIndex] != delimiter[index])
    {
      // HOUR can be preceded by either ':' or ' '
      if ((field != REC_DATE_HOUR) || (source[strIndex] != ' '))
      {
        ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
        return ex_expr::EXPR_ERROR;
      }
    }
    
    strIndex++;  // step over delimiter 
    fieldLen = 2;
    if (fieldLen > sourceLen - strIndex)
      fieldLen = sourceLen - strIndex;  // don't go off end of string

    // convert the next field
    if (convAsciiFieldToInt64(fieldValue,
                              0, // targetScale
                              &source[strIndex],
                              fieldLen,
                              heap,
                              diagsArea,
                              flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if (fieldValue > maxFieldValue[index])
    {
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
      return ex_expr::EXPR_ERROR;
    }
    strIndex += fieldLen;
    intermediate = intermediate * (maxFieldValue[index]+1) + fieldValue;
  }

  // adjust the value for fractionPrecision 
  for (short i = 0; i < fractionPrecision; i++)
  {
    intermediate *= 10;
  }
  
  // if the end field is SECOND, it may have a fractional part
  if ((end == REC_DATE_SECOND) && (source[strIndex] == '.'))
  {
    Lng32 sourcePrecision = (sourceLen - strIndex - 1);
    ULng32 fraction = 0;
    if (sourcePrecision) 
    {
      if (convDoIt(&source[strIndex+1],
                   sourcePrecision, // sourceLen
                   REC_BYTE_F_ASCII,
                   0, // sourcePrecision
                   0, // sourceScale
                   (char *) &fraction,
                   4, // targetLen
                   REC_BIN32_UNSIGNED,
                   0, // targetPrecision
                   0, // targetScale
                   NULL, // varCharLen
                   0,    // varCharLenSize
                   heap,
                   diagsArea,
                   CONV_ASCII_BIN32U,
                   0,
                   flags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
    };

    // scale up or down if necessary
    while (sourcePrecision < fractionPrecision) 
    {
      fraction *= 10;
      sourcePrecision++;
    }

    ULng32 oldFraction = fraction;
    ULng32 scaleDownValue = 1;

    while (sourcePrecision > fractionPrecision) 
    {
      fraction /= 10;
      scaleDownValue *= 10;
      sourcePrecision--;
    }

    // Detect if meaningful scale truncation has occured.  If so, raise an error
    if (oldFraction > (fraction * scaleDownValue)) {
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
      return ex_expr::EXPR_ERROR;        
    }
 
    intermediate += fraction;
  }
  else 
  {
    // check if the string is completely converted
    if (strIndex != sourceLen)
    {
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
      return ex_expr::EXPR_ERROR;
    }
  }

  switch (targetLen)
  {
    case SQL_SMALL_SIZE:
      if ((intermediate < SHRT_MIN) || (intermediate > SHRT_MAX))
      {
        ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
        return ex_expr::EXPR_ERROR;
      };
      if (negInterval)
	*(Target<short> *)target = -(short)intermediate;
      else
	*(Target<short> *)target = (short)intermediate;
      break;

    case SQL_INT_SIZE:
      if ((intermediate < INT_MIN) || (intermediate > INT_MAX))
      {
        ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
        return ex_expr::EXPR_ERROR;
      };
      if (negInterval)
	*(Target<Int32> *)target = -(Int32)intermediate;
      else
	*(Target<Int32> *)target = (Int32)intermediate;
      break;

    case SQL_LARGE_SIZE:
      if (negInterval)
	*(Target<Int64> *)target = -intermediate;
      else
	*(Target<Int64> *)target = intermediate;
      break;

    default:
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_INTERVAL_ERROR);
      return ex_expr::EXPR_ERROR;
  }
  return ex_expr::EXPR_OK;
};

///////////////////////////////////////////////////////////////////
// function to convert a INTERVAL to a string. 
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convIntervalToAscii(char *source,
					     Lng32 sourceLen,
                                             Lng32 leadingPrecision,
                                             Lng32 fractionPrecision, 
                                             short sourceType, 
                                             char *inTarget, 
                                             Lng32 inTargetLen,
                                             Lng32 inTargetPrecision, // max chars allowed
					     char *varCharLen,
					     Lng32 varCharLenSize,
					     NABoolean leftPad,
					     CollHeap *heap,
					     ComDiagsArea** diagsArea) 
{
  ULng32 flags = 0;
  char delimiter[] = "^-^ ::";
  unsigned short maxFieldValue[] = { 0, 11, 0, 23, 59, 59 };

  Lng32 realTargetLen;
  Lng32 inTargetChars = inTargetLen;
  Int16 trgType;
  if (varCharLenSize)
    trgType = REC_BYTE_V_ASCII;
  else
    trgType = REC_BYTE_F_ASCII;

  rec_datetime_field startField = getIntervalStartField(sourceType);
  rec_datetime_field endField = getIntervalEndField(sourceType);

  Int64 value;
  switch (sourceLen) 
  {
    case SQL_SMALL_SIZE: 
    {
      short temp;
      str_cpy_all((char *) &temp, source, sourceLen);
      value = temp;
      break;
    }
    case SQL_INT_SIZE: 
    {
      Lng32 temp;
      str_cpy_all((char *) &temp, source, sourceLen);
      value = temp;
      break;
    }
    case SQL_LARGE_SIZE:
      str_cpy_all((char *) &value, source, sourceLen);
      break;
    default:
      return ex_expr::EXPR_ERROR;
  }

  char sign = '+';
  if (value < 0) 
  {
    sign = '-';
    value = -value;
  }

  // 1 for -ve sign, each field is 2 + delimiter
  realTargetLen = (sign == '-' ? 1 : 0)
    + leadingPrecision + (endField - startField) * 3;
  short targetIndex = (short) realTargetLen;
  if (fractionPrecision)
    realTargetLen += fractionPrecision + 1; // 1 for '.'

  if (inTargetPrecision)
    {
      assert(inTargetPrecision <= inTargetLen);
      inTargetChars = inTargetPrecision;
    }
  
  if (inTargetChars < realTargetLen) 
  {
    ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
      source, sourceLen, sourceType, fractionPrecision, trgType, flags
      );
    return ex_expr::EXPR_ERROR;
  }

  Lng32 targetLen = inTargetChars;
  char * target = inTarget;
  if ((leftPad) && (targetLen > realTargetLen))
    {
      // left blankpad the target.
      for (Int32 i = 0; i < (targetLen - realTargetLen); i++)
	{
	  target[i] = ' ';
	}

      // switch target and targetLen to be equal to realTargetLen.
      target = inTarget + (targetLen - realTargetLen);
      targetLen = realTargetLen;
    }

  Int64 factor = 1;
  Int64 fieldVal = 0;
  if (fractionPrecision)
  {
    //    realTargetLen += fractionPrecision + 1; // 1 for '.'
    for (UInt32 i = fractionPrecision; i > 0; i--)
    {
      factor *= 10;
    }
    fieldVal = value;
    value = value / factor;
    fieldVal -= value * factor;
  }

  while (targetLen < realTargetLen) 
  {
    // cut fraction till it fits. At this point we know that
    // precision = 0 will fit
    fieldVal /= 10;
    fractionPrecision--;
    realTargetLen--;
    if (!fractionPrecision)
      realTargetLen--; // remove '.'
  };
  
  // if target is fixed length, fill target string flushed right
  if (!varCharLenSize) {
    for (Int32 i = 0; i < (targetLen - realTargetLen); i++, target++)
      *target = ' ';
  // If target is actually UTF8, we must put filler spaces in rest of target
    if ( target < (inTarget + inTargetLen) )
       str_pad(target, inTarget + inTargetLen - target, ' ');
  };

  // convert fraction part if any. targetIndex was set earlier
  if (fractionPrecision) 
  {
    targetIndex += 1; // 1 for '.'
    str_pad(target+targetIndex, fractionPrecision, '0');
    if (convInt64ToAscii(target + targetIndex,
			 fractionPrecision, // targetLen
                         0, 
                         0,
                         (Int64) fieldVal,
                         0, // scale,
                         NULL, // varCharLen
                         0, // varCharLenSize
                         '0', // filler character
			 FALSE,
                         TRUE, // leftPad
                         FALSE,
			 heap,
                         diagsArea) != ex_expr::EXPR_OK)
	return ex_expr::EXPR_ERROR;

    targetIndex--;
    target[targetIndex] = '.';
  };

  // Now rest of the fields except leading field...
  for (Int32 field = endField; field > startField; field--)
  {
    Int32 index = field - REC_DATE_YEAR;      // zero-based array index!
    
    factor = (short)maxFieldValue[index]+1;
    fieldVal = value;
    value = value / factor;
    fieldVal -= value * factor;
    targetIndex -= 2;
    
    if (convInt64ToAscii(target + targetIndex,
                         2, // targetLen
                         0,
                         0, 
                         (Int64) fieldVal,
                         0, // scale,
                         NULL, // varCharLen
                         0, // varCharLenSize
                         '0', // filler character
			 FALSE,
                         TRUE, // leftPad
                         FALSE,
			 heap,
                         diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
    
    targetIndex--;
    target[targetIndex] = delimiter[index];
  };

  // leading field
  if (convInt64ToAscii(target + (sign == '-' ? 1 : 0),
                       leadingPrecision, // targetLen
                       0,
                       0,
                       (Int64) value,
                       0, // scale,
                       NULL, // varCharLen
                       0, // varCharLenSize
                       ' ', // filler character
		       FALSE,
                       TRUE, // leftPad
                       FALSE,
		       heap,
                       diagsArea) != ex_expr::EXPR_OK)
    return ex_expr::EXPR_ERROR;

  if (sign == '-')
  {
    // Sign goes here.
    // convInt64ToAscii() writes getDigitCount(value) number of digits
    // space padded on the left, between target + 1 and
    // target + leadingPrecision character positions.
    // the following is one position to the left of the most significant
    // digit and this is where sign should be.
    
    char *sp = (target + leadingPrecision - getDigitCount(value));

    *sp = '-';

    // Further to the left of the sign there can only be just one more
    // character (because we pass target + 1 to convInt64ToAscii). When
    // the sign is to the right of the target, there is this extra character
    // which may contain garbage, so we need to clear it.
    
    if (sp > target)
      *target = ' ';
  }
  //  else
  //  {
  //    target[0] = ' ';
  //  }

  // set length field for variable length targets
  if (varCharLenSize) 
  {
    if (varCharLenSize == sizeof(Lng32))
      str_cpy_all(varCharLen, (char *) &realTargetLen, sizeof(Lng32));
    else 
    {
      short VCLen = (short) realTargetLen;
      str_cpy_all(varCharLen, (char *) &VCLen, sizeof(short));
    };
  };

  return ex_expr::EXPR_OK;
};


///////////////////////////////////////////////////////////////////
// function to convert a BIGNUM to Int64
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convBigNumToInt64(Int64 *target,
					   char *source,
					   Lng32 sourceLen,
					   NAMemory *heap,
					   ComDiagsArea** diagsArea,
                                           ULng32 flags)

{ 
  short retCode = BigNumHelper::ConvBigNumWithSignToInt64Helper(sourceLen,
                                                                source,
                                                                (void*)target,
                                                                FALSE);
  if (retCode == -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		          sourceLen, REC_NUM_BIG_SIGNED, 0, REC_BIN64_SIGNED,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;
}

ex_expr::exp_return_type convBigNumToUInt64(UInt64 *target,
                                            char *source,
                                            Lng32 sourceLen,
                                            NAMemory *heap,
                                            ComDiagsArea** diagsArea,
                                            ULng32 flags)

{ 
  short retCode = BigNumHelper::ConvBigNumWithSignToInt64Helper(sourceLen,
                                                                source,
                                                                (void*)target,
                                                                TRUE);
  if (retCode == -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		          sourceLen, REC_NUM_BIG_SIGNED, 0, REC_BIN64_UNSIGNED,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;
}


///////////////////////////////////////////////////////////////////
// function to convert a BIGNUM to Int64 and scale it, returning
// information about the conversion to the caller (e.g. truncations,
// overflows). The conversion status information is returned in the
// return code instead of in the ComDiagsArea; if the caller wishes
// an exception, then the caller must convert the return code to
// an appropriate exception. In the event of overflow, a maximum
// or minimum value is returned.
///////////////////////////////////////////////////////////////////

ex_conv_clause::ConvResult convBigNumToInt64AndScale(Int64 *target,
					             char *source,
					             Lng32 sourceLen,
                                                     Lng32 exponent,
                                                     NAMemory * heap)
					           

{ short retCode = BigNumHelper::ConvBigNumWithSignToInt64AndScaleHelper(sourceLen,
                                                                        source,
                                                                        target,
                                                                        exponent,
                                                                        heap);

  // The retCode can have 5 possible values (see the helper method for details):
  //   0: the conversion was ok
  //   1: the result was rounded up to LLONG_MIN
  //   2: the result was rounded down to LLONG_MAX
  //   3: the result was rounded up
  //   4: the result was rounded down
  
  switch (retCode) {
    case 1: return ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
    case 2: return ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
    case 3: return ex_conv_clause::CONV_RESULT_ROUNDED_UP;
    case 4: return ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
    default:// retCode == 0
            return ex_conv_clause::CONV_RESULT_OK; 
    }

   
}


///////////////////////////////////////////////////////////////////
// function to convert a LARGEDEC to DEC (signed or unsigned),
// with scaling -- returns a return code indicating whether
// the result is equal to the original or if rounding occurred
///////////////////////////////////////////////////////////////////
ex_conv_clause::ConvResult convLargeDecToDecAndScale(char *target,
				  	   Lng32 targetLen,
					   char *source,
					   Lng32 sourceLen,
                                           NABoolean resultUnsigned,
                                           Lng32 exponent) 
{  
  ex_conv_clause::ConvResult rc =
    ex_conv_clause::CONV_RESULT_OK;  // assume success
  NABoolean negative = (source[0] == '-');

  if ((resultUnsigned) && (negative))
    {
      // we are trying to convert a negative number to an
      // unsigned target -  set to minimum (unsigned) value
      str_pad(target, targetLen, '0');
      return ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
    }
  
  // at this point, we know that the source is non-negative or
  // that the target is signed
 
  // if we are scaling up, truncate the source; remember if any
  // non-zero digits were truncated
  NABoolean significantTruncationOccurred = FALSE;
  if (exponent < 0)
    {
      Lng32 truncatedLen = -exponent;

      if (truncatedLen >= sourceLen)
        truncatedLen = sourceLen - 1;  // everything was truncated!

      sourceLen -= truncatedLen;

      char *truncatedPart = &source[sourceLen];

      // look for a non-zero digit in the truncated part (anywhere)
      Lng32 i = truncatedLen-1;
      for (; (i >= 0) && (truncatedPart[i] == 0); i--) ;

      if (i >= 0)  // if we found one...
        significantTruncationOccurred = TRUE;

      exponent = 0;  // to make later logic easier
    }

  // determine length of source (skip leading zeros)
  Lng32 sourcePos = 1;
  while ((sourcePos < sourceLen) && (source[sourcePos] == 0))
    sourcePos++;

  Lng32 copyLen = sourceLen - sourcePos;
 
  // if source is still too big, overflow
  if (copyLen > targetLen - exponent) 
    { 
      // set target to maximum (or minimum) value
      str_pad(target,targetLen, '9');
      if (negative) // if source is negative
        {
          // note that we know target is signed in this case,
          // so the minimum value is simply -(maximum value)
          target[0] |= 0200;  // turn on sign bit
          return ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
        }
      // else we know it's the maximum    
      return ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX; 
    }

  // source fits in target, copy and left-pad target with zero if
  // necessary
  Lng32 targetPos = targetLen - copyLen - exponent;

  str_pad(target, targetPos, '0');
  while (sourcePos < sourceLen)
    target[targetPos++] = source[sourcePos++] + '0';

  // do any scaling down needed
  while (exponent > 0)
    {
      target[targetPos++] = '0';
      exponent--;
    }

  if (negative)  // if source was negative
    target[0] |= 0200;   // turn on sign bit

  // change return code if significant truncation occurred
  if (significantTruncationOccurred)
    {
      if (negative)
        rc = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
      else
        rc = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
    } 

  return rc;
};


///////////////////////////////////////////////////////////////////
// function to convert a BIGNUM to DEC (signed or unsigned),
// with scaling -- returns a return code indicating whether
// the result is equal to the original or if rounding occurred
//
// We first convert from BIGNUM to LARGEDEC, then convert from LARGEDEC
// to DEC and scale
///////////////////////////////////////////////////////////////////
ex_conv_clause::ConvResult convBigNumToDecAndScale(char *target,
				  	           Lng32 targetLen,
					           char *source,
					           Lng32 sourceLen,
                                                   Lng32 sourcePrecision,
                                                   NABoolean resultUnsigned,
                                                   Lng32 exponent,
                                                   NAMemory * heap) 

{
  char * intermediateLargeDec = new (heap) char[sourcePrecision + 1]; // one extra byte for the sign.
  BigNumHelper::ConvBigNumWithSignToBcdHelper(sourceLen,
			                      sourcePrecision + 1, 
			                      source,
			                      intermediateLargeDec,
                                              heap);

  // Convert from large dec to dec and scale.
  ex_conv_clause::ConvResult retValue = convLargeDecToDecAndScale(target,
				                                  targetLen,
				                                  intermediateLargeDec,
				                                  sourcePrecision + 1,
                                                                  resultUnsigned,
                                                                  exponent); 
  NADELETEBASIC(intermediateLargeDec, (heap));
  return retValue;

}


///////////////////////////////////////////////////////////////////
// function to convert a BIGNUM to BIGNUM
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convBigNumToBigNum(char *target,
					    Lng32 targetLen,
					    Lng32 targetType,
					    Lng32 targetPrecision,
					    char *source,
					    Lng32 sourceLen,
					    Lng32 sourceType,
					    Lng32 sourcePrecision,
					    NAMemory *heap,
                                            ComDiagsArea** diagsArea,
                                            ULng32 flags) {

  short retCode = ex_expr::EXPR_OK;
  
  if (sourcePrecision > targetPrecision)
    {
      // return an error if source precision is greater than target precision
      // and source will not fit into target.
      // For now, do this by first converting source to char and then 
      // convert char to target.
      // Need to optimize this so ConvBigNumWithSignToBigNumWithSignHelper
      // can return this error instead of going through the char conversion.

      Lng32 intermediateLen = sourcePrecision + 1; // +1 for sign
      char * intermediate = (char *)heap->allocateMemory(intermediateLen);
      retCode = convBigNumToAscii(intermediate,
				  sourcePrecision+1,
                                  0,
				  source,
				  sourceLen,
				  sourcePrecision,
				  0,
				  NULL, 0,
				  0,
				  heap,
				  diagsArea,
				  0);
      if (retCode == ex_expr::EXPR_OK)
	{
	  // now convert intermediate to target
	  retCode = convAsciiToBigNum(target,
				      targetLen,
				      targetType,
				      targetPrecision,
				      0,
				      intermediate,
				      sourcePrecision+1,
				      heap,
				      diagsArea,
				      0);	  
	}

      heap->deallocateMemory((void *)intermediate);

      if (retCode != ex_expr::EXPR_OK)
	{
	  // overflow error. diagsArea already contains the error.
	  return ex_expr::EXPR_ERROR;
	}
    };
  
  if (targetType == REC_NUM_BIG_UNSIGNED)
    {
      char sign = BIGN_GET_SIGN(source, sourceLen);

      if (sign)
	{
	  ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
	  
	  return ex_expr::EXPR_ERROR;
	}
    }

  retCode = BigNumHelper::ConvBigNumWithSignToBigNumWithSignHelper(sourceLen,
								   targetLen,
								   source,
								   target);
  if (retCode== -1) {
    // target is not long enough - overflow
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		          sourceLen, REC_NUM_BIG_SIGNED, 0, REC_NUM_BIG_SIGNED,
                          flags);
    return ex_expr::EXPR_ERROR;
  };

  return ex_expr::EXPR_OK;

}


//////////////////////////////////////////////////////////////////
// function to convert Decimal to Int64
///////////////////////////////////////////////////////////////////

ex_expr::exp_return_type convDecToInt64(Int64 &target,
					char *source,
					Lng32 sourceLen,
					CollHeap *heap,
					ComDiagsArea** diagsArea,
                                        ULng32 flags) {
  //
  // The first bit of the first byte of the decimal value is the sign bit.
  // If the bit is set, the decimal value is a negative number.  Reset
  // the bit before converting the value to binary.
  //
  target = '0' - (source[0] & 0177);

  Lng32 currPos = 1;

  // skip leading zeros only if first byte was zero
  if (!target) {
    while ((currPos < sourceLen) && (source[currPos] == '0'))
      currPos++;
  };

  // Convert the value to a negative binary number.  Check for overflow.
  while (currPos < sourceLen) {
    if (source[currPos] < '0' || source[currPos] > '9') {
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      return ex_expr::EXPR_ERROR;
    };
    target *= 10;
    target -= source[currPos++] - '0';
    if (target > 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		            sourceLen, REC_DECIMAL_LSE, 0, REC_BIN64_SIGNED,
                            flags);
      return ex_expr::EXPR_ERROR;
    };
  };

  // If the decimal value was positive, negate the value.  Check for overflow.
  if (!(source[0] & 0200)) {
    target = - target;
    if (target < 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		            sourceLen, REC_DECIMAL_LSE, 0, REC_BIN64_SIGNED,
                            flags);
      return ex_expr::EXPR_ERROR;
    };
  };
  
  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert Decimal to Decimal
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convDecToDec(char *target,
				      Lng32 targetLen,
				      char *source,
				      Lng32 sourceLen,
				      CollHeap *heap,
				      ComDiagsArea** diagsArea) {
  if (targetLen >= sourceLen) {
    Lng32 targetIndex = targetLen - sourceLen;
    str_pad(target, (Int32) targetIndex, '0');
    str_cpy_all(&target[targetIndex], source, sourceLen);
    // Clear the sign bit that was moved to target[targetIndex].
    target[targetIndex] &= 0177;
  }
  else {
    if ((source[0] & 0177) != '0') {

      // target string is not long enough - overflow
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      return ex_expr::EXPR_ERROR;
    };
    
    Lng32 sourceIndex = sourceLen - targetLen;
    for (Lng32 i = 1; i < sourceIndex; i++)
      if (source[i] != '0') {
        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
	ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

        return ex_expr::EXPR_ERROR;
      };
    str_cpy_all(target, &source[sourceIndex], targetLen);
  }
  //
  // If the source is negative, set the sign bit in the target.
  //
  if (source[0] & 0200)
    target[0] |= 0200;
  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// function to convert DecimalLS to ASCII
///////////////////////////////////////////////////////////////////
ex_expr::exp_return_type convDecLStoAscii(char *target,
					  Lng32 targetLen,
                                          Lng32 targetPrecision, // num chars in tgt
					  char *source,
					  Lng32 sourceLen,
					  Lng32 sourceScale,
					  CollHeap *heap,
					  ComDiagsArea** diagsArea,
                                          ULng32 flags) {

  Lng32 curPos = sourceLen - 1;
  Lng32 targetLenInChars = ( targetPrecision ? targetPrecision : targetLen );
  Lng32 targetPos = targetLenInChars - 1;
  // skip blanks, start from end
  while (source[curPos] == ' ' && curPos >= 0)
    curPos--;

  if (curPos < 0) {
    // only blanks: Error
    ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		          sourceLen, REC_DECIMAL_LS, sourceScale,
                          REC_BYTE_F_ASCII, flags);
    return ex_expr::EXPR_ERROR;
  };

  // move data from source to target, put in decimal point where
  // required
  Int32 digitCnt = 0;
  while ((curPos >= 0) &&
	 (source[curPos] >= '0') && (source[curPos] <= '9')) {

    // another digit. Make sure we have space in the target
    digitCnt++;
    if (targetPos < 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		            sourceLen, REC_DECIMAL_LS, sourceScale,
                            REC_BYTE_F_ASCII,
                            flags);
      return ex_expr::EXPR_ERROR;
    };

    // move digit
    target[targetPos--] = source[curPos--];

    // insert scale
    if (sourceScale == digitCnt) {
      // make sure we have space for scale
      if (targetPos < 0) {
	ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		              sourceLen, REC_DECIMAL_LS, sourceScale,
                              REC_BYTE_F_ASCII,
                              flags);
	return ex_expr::EXPR_ERROR;
      };
      // put decimal point in target
      target[targetPos--] = '.';
    };
  };

  // if we have a scale and did not insert the decimal point yet,
  // add zeros until we can put in the point
  while (digitCnt < sourceScale) {
    // Make sure we have space in the target
    if (targetPos < 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		            sourceLen, REC_DECIMAL_LS, sourceScale,
                            REC_BYTE_F_ASCII,
                            flags);
      return ex_expr::EXPR_ERROR;
    };

    // put in zero
    target[targetPos--] = '0';
    digitCnt++;

    // insert scale
    if (sourceScale == digitCnt) {
      // make sure we have space for scale
      if (targetPos < 0) {
	ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		              sourceLen, REC_DECIMAL_LS, sourceScale,
                              REC_BYTE_F_ASCII,
                              flags);
	return ex_expr::EXPR_ERROR;
      };
      // put decimal point in target
      target[targetPos--] = '.';
    };
  };

  // add negative sign, if we have one
  if((curPos >= 0) && (source[curPos] == '-')) {
    // make sure we have space for sign
    if (targetPos < 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
		            sourceLen, REC_DECIMAL_LS, sourceScale,
                            REC_BYTE_F_ASCII,
                            flags);
      return ex_expr::EXPR_ERROR;
    };
    // put sign in target
    target[targetPos--] = '-';
  };

  // left pad  target with blanks
  while (targetPos >= 0)
    target[targetPos--] = ' ';

  // right pad, if targetLenInChars < targetLen
  targetPos = targetLenInChars;
  while (targetPos < targetLen)
    target[targetPos++] = ' ';

  return ex_expr::EXPR_OK;
};

//////////////////////////////////////////////////////////////////
// This function returns an int64 with the minimum value that
// can be represented in a decimal type with the characteristics
// specified by the arguements.
// The function assumes that targetLen is 0 to 18, inclusive.
// The function assumes that targetType is one of the following:
//   REC_DECIMAL_UNSIGNED (150)
//   REC_DECIMAL_LSE (152).
///////////////////////////////////////////////////////////////////

Int64 getMinDecValue(Lng32 targetLen,
                     short targetType)
  {

    static const Int64 decValue[] = {0,
                               -9,
                               -99,
                               -999,
                               -9999,
                               -99999,
                               -999999,
                               -9999999,
                               -99999999,
                               -999999999,
                               -9999999999LL,
                               -99999999999LL,
                               -999999999999LL,
                               -9999999999999LL,
                               -99999999999999LL,
                               -999999999999999LL,
                               -9999999999999999LL,
                               -99999999999999999LL,
                               -999999999999999999LL}; 

    if (targetType == REC_DECIMAL_UNSIGNED)
      {  // Target is unsigned so the minimum value is zero.
        return 0;
      }
    else 
      {  // Target is signed so get the minimum value from the array.
        return decValue[targetLen];
      }
    }


//////////////////////////////////////////////////////////////////
// This function returns an int64 with the minimum value that
// can be represented in an interval type with the characteristics
// specified by the arguements.
// The function assumes that targetLen is 0 to 18, inclusive.
// The function assumes that targetType is in the range: 
//     195 - 207
// - MARIA - 11/06/98
///////////////////////////////////////////////////////////////////

Int64 getMinIntervalValue(Lng32 targetPrecision,
                          short targetType) {

  targetType -= REC_MIN_INTERVAL;  //REC_MIN_INTERVAL should be 195

  // a table of all possible minimum interval values grouped by
  // interval type

  // Note: The minimum signed 64-bit value is -9223372036854775808,
  // (which we code as 0x8000000000000000 to avoid compiler whining)
  // so where a target type and precision would demand a value
  // smaller than this, we use this minimum instead.

  static const Int64 MinValue[][19] = 
  {
  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999, 
   -999999999LL, -9999999999LL, -99999999999LL, -999999999999LL,
   -9999999999999LL, -99999999999999LL, -999999999999999LL,
   -9999999999999999LL, -99999999999999999LL, 
   -999999999999999999LL}, //REC_INT_YEAR 195

  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999, -999999999,
   -9999999999LL, -99999999999LL, -999999999999LL, -9999999999999LL,
   -99999999999999LL, -999999999999999LL, -9999999999999999LL,
   -99999999999999999LL,
   -999999999999999999LL}, //REC_INT_MONTH 196

  {0, -119, -1199, -11999, -119999, -1199999, -11999999, -119999999,
   -1199999999LL, -11999999999LL, -119999999999LL, -1199999999999LL,
   -11999999999999LL, -119999999999999LL, -1199999999999999LL,
   -11999999999999999LL, -119999999999999999LL, -1199999999999999999LL, 
   LONG_MAX},  //REC_INT_YEAR_MONTH 197

  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999,
   -999999999LL, -9999999999LL, -99999999999LL, -999999999999LL,
   -9999999999999LL, -99999999999999LL, -999999999999999LL,
   -9999999999999999LL, -99999999999999999LL,
   -999999999999999999LL}, //REC_INT_DAY 198

  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999,
   -999999999LL, -9999999999LL, -99999999999LL, -999999999999LL,
   -9999999999999LL, -99999999999999LL, -999999999999999LL,
   -9999999999999999LL, -99999999999999999LL,
   -999999999999999999LL}, //REC_INT_HOUR 199

  {0, -239, -2399, -23999, -239999, -2399999, -23999999, -239999999,
   -(Int64)(2399999999LL), -23999999999LL, -239999999999LL,
   -2399999999999LL, -23999999999999LL, -239999999999999LL,
   -2399999999999999LL, -23999999999999999LL,
   -239999999999999999LL, -2399999999999999999LL,
   LONG_MAX},  // REC_INT_DAY_HOUR 200

  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999,
   -999999999LL, -9999999999LL, -99999999999LL, -999999999999LL,
   -9999999999999LL, -99999999999999LL, -999999999999999LL,
   -9999999999999999LL, -99999999999999999LL,
   -999999999999999999LL}, //REC_INT_MINUTE 201

  {0, -599, -5999, -59999, -599999, -5999999, -59999999, -599999999,
   -5999999999LL, -59999999999LL, -599999999999LL, -5999999999999LL,
   -59999999999999LL, -599999999999999LL, -5999999999999999LL,
   -59999999999999999LL, -599999999999999999LL, -5999999999999999999LL, 
   LONG_MAX},  //REC_INT_HOUR_MINUTE 202
   

  {0, -14399, -143999, -1439999, -14399999, -143999999, -1439999999,
   -14399999999LL, -143999999999LL, -1439999999999LL, -14399999999999LL,
   -143999999999999LL, -1439999999999999LL, -14399999999999999LL,
   -143999999999999999LL, -1439999999999999999LL, LONG_MAX, 
   LONG_MAX, LONG_MAX},  //REC_INT_DAY_MINUTE 203

  {0, -9, -99, -999, -9999, -99999, -999999, -9999999, -99999999,
   -999999999LL, -9999999999LL, -99999999999LL, -999999999999LL,
   -9999999999999LL, -99999999999999LL, -999999999999999LL,
   -9999999999999999LL, -99999999999999999LL,
   -999999999999999999LL}, //REC_INT_SECOND 204   

  {0, -599, -5999, -59999, -599999, -5999999, -59999999, -599999999,
    -5999999999LL, -59999999999LL, -599999999999LL, -5999999999999LL,
   // 0123456789    01234567890    012345678901
    -59999999999999LL, -599999999999999LL, -5999999999999999LL, 
   // 0123456789012    01234567890123    012345678901234
    -59999999999999999LL, -599999999999999999LL, -5999999999999999999LL,
   // 0123456789012345    01234567890123456    012345678901234567
     LONG_MAX
   //  0123012301230123
  },  //REC_INT_MINUTE_SECOND 205

  {0, -35999, -359999, -3599999, -35999999, -359999999, -(Int64)(3599999999LL),
   -35999999999LL, -359999999999LL, -3599999999999LL, -35999999999999LL, 
   //                                              012345678901
   -359999999999999LL, -3599999999999999LL, -35999999999999999LL,
   // 0123456789012     01234567890123     012345678901234   
   -359999999999999999LL, -3599999999999999999LL, LONG_MAX, 
   // 0123456789012345     01234567890123456    0123012301230123 
   LONG_MAX, LONG_MAX 
  },  //REC_INT_HOUR_SECOND 206

  {0, -863999, -8639999, -86399999, -863999999, -8639999999LL, -86399999999LL,
   -863999999999LL, -8639999999999LL, -86399999999999LL, -863999999999999LL,
   //  012345678      0123456789      01234567890      012345678901
   -8639999999999999LL, -86399999999999999LL, -863999999999999999LL, 
   //  0123456789012      01234567890123      012345678901234
   -8639999999999999999LL, LONG_MAX, LONG_MAX,    
   //  0123456789012345    0123012301230123    
   LONG_MAX, LONG_MAX   
  } // REC_INT_DAY_SECOND 207

  };

  return MinValue[targetType][targetPrecision];

}


//////////////////////////////////////////////////////////////////
// This function count the number of digits in a non-negative Int64.
// The function assumes that targetLen is 1 to 19, inclusive.
///////////////////////////////////////////////////////////////////

Lng32 getDigitCount(UInt64 value)
  {
    static const UInt64 decValue[] = {0,
                               9,
                               99,
                               999,
                               9999,
                               99999,
                               999999,
                               9999999,
                               99999999,
                               999999999,
                               9999999999ULL,
                               99999999999ULL,
                               999999999999ULL,
                               9999999999999ULL,
                               99999999999999ULL,
                               999999999999999ULL,
                               9999999999999999ULL,
                               99999999999999999ULL,
                               999999999999999999ULL,
                               9999999999999999999ULL};

    for (Int32 i = 4; i <= 16; i += 4)
      if (value <= decValue[i]) {
	if (value <= decValue[i-3])
	  return(i-3);
	if (value <= decValue[i-2])
	  return(i-2);
	if (value <= decValue[i-1])
	  return(i-1);
	else return i;
      }
    if (value <= decValue[17])
      return 17;
    if (value <= decValue[18])
      return 18;
    if (value <= decValue[19])
      return 19;
    return 20;
  }

//////////////////////////////////////////////////////////////////
// This function returns an int64 with the maximum value that
// can be represented in a decimal type with the characteristics
// specified by the arguement.
// The function assumes that targetLen is 0 to 18, inclusive.
///////////////////////////////////////////////////////////////////

Int64 getMaxDecValue(Lng32 targetLen)
  {
    static const Int64 decValue[] = {0,
                               9,
                               99,
                               999,
                               9999,
                               99999,
                               999999,
                               9999999,
                               99999999,
                               999999999,
                               9999999999LL,
                               99999999999LL,
                               999999999999LL,
                               9999999999999LL,
                               99999999999999LL,
                               999999999999999LL,
                               9999999999999999LL,
                               99999999999999999LL,
                               999999999999999999LL}; 

    return decValue[targetLen];
  }

//////////////////////////////////////////////////////////////////
// This function returns an int64 with the maximum value that
// can be represented in an interval type with the characteristics
// specified by the arguement.
// The function assumes that targetLen is 0 to 18, inclusive.
// The function also assumes that the targetType is between 195-207
//  - MARIA - 11/06/98
///////////////////////////////////////////////////////////////////


Int64 getMaxIntervalValue(Lng32 targetPrecision,
                          short targetType) {
  targetType -= REC_MIN_INTERVAL;  //REC_MIN_INTERVAL should be 195
  // a table of all possible maximum interval values grouped by
  // interval type

  // Note: The maximum signed 64-bit value is 9223372036854775807,
  // so where a target type and precision would demand a value
  // larger than this, we use this maximum instead.

  static const Int64 MaxValue[][19] = 
  {
  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999,
   999999999, 9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL,
   99999999999999LL, 999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_YEAR 195

  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999,
   9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL, 99999999999999LL,
   999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_MONTH 196

  {0, 119, 1199, 11999, 119999, 1199999, 11999999, 119999999,
   1199999999LL, 11999999999LL, 119999999999LL, 1199999999999LL, 11999999999999LL,
   119999999999999LL, 1199999999999999LL, 11999999999999999LL, 119999999999999999LL,
   1199999999999999999LL, 9223372036854775807LL},  //REC_INT_YEAR_MONTH 197

  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999,
   9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL, 99999999999999LL,
   999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_DAY 198

  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999,
   9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL, 99999999999999LL,
   999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_HOUR 199

  {0, 239, 2399, 23999, 239999, 2399999, 23999999, 239999999, 2399999999LL,
   23999999999LL, 239999999999LL, 2399999999999LL, 23999999999999LL,
   239999999999999LL, 2399999999999999LL, 23999999999999999LL,
   239999999999999999LL, 2399999999999999999LL, 
   9223372036854775807LL},  // REC_INT_DAY_HOUR 200

  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999LL,
   9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL, 99999999999999LL,
   999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_MINUTE 201

  {0, 599, 5999, 59999, 599999, 5999999, 59999999, 599999999, 5999999999LL,
   59999999999LL, 599999999999LL, 5999999999999LL, 59999999999999LL, 599999999999999LL,
   5999999999999999LL, 59999999999999999LL, 599999999999999999LL, 
   5999999999999999999LL, 9223372036854775807LL},  //REC_INT_HOUR_MINUTE 202

  {0, 14399, 143999, 1439999, 14399999, 143999999, 1439999999LL,
   14399999999LL, 143999999999LL, 1439999999999LL, 14399999999999LL,
   143999999999999LL, 1439999999999999LL, 14399999999999999LL, 143999999999999999LL,
   1439999999999999999LL, 9223372036854775807LL, 9223372036854775807LL, 
   9223372036854775807LL},  //REC_INT_DAY_MINUTE 203

  {0, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999LL,
  9999999999LL, 99999999999LL, 999999999999LL, 9999999999999LL, 99999999999999LL,
   999999999999999LL, 9999999999999999LL, 99999999999999999LL,
   999999999999999999LL}, //REC_INT_SECOND 204

  {0, 599, 5999, 59999, 599999, 5999999, 59999999, 599999999, 5999999999LL,
     59999999999LL, 599999999999LL, 5999999999999LL,
   // 0123456789   01234567890   012345678901
     59999999999999LL, 599999999999999LL, 5999999999999999LL, 
   // 0123456789012   01234567890123   012345678901234
     59999999999999999LL, 599999999999999999LL, 5999999999999999999LL,
   // 0123456789012345   01234567890123456   012345678901234567
     9223372036854775807LL
   // 0123456789012345678
  },  //REC_INT_MINUTE_SECOND 205

  {0, 35999, 359999, 3599999, 35999999, 359999999, 3599999999LL,
   35999999999LL, 359999999999LL, 3599999999999LL, 35999999999999LL, 
   //                                          012345678901
   359999999999999LL, 3599999999999999LL, 35999999999999999LL,
   //0123456789012    01234567890123    012345678901234   
   359999999999999999LL, 3599999999999999999LL, 9223372036854775807LL, 
   //0123456789012345    01234567890123456    012345678901234567 
   9223372036854775807LL, 9223372036854775807LL
  },  //REC_INT_HOUR_SECOND 206

  {0, 863999, 8639999, 86399999, 863999999, 8639999999LL, 86399999999LL,
   863999999999LL, 8639999999999LL, 86399999999999LL, 863999999999999LL,
   // 012345678     0123456789     01234567890     012345678901
   8639999999999999LL, 86399999999999999LL, 863999999999999999LL, 
   // 0123456789012     01234567890123     012345678901234
   8639999999999999999LL, 9223372036854775807LL, 9223372036854775807LL,    
   // 0123456789012345     01234567890123456    
   9223372036854775807LL, 9223372036854775807LL   
  } // REC_INT_DAY_SECOND 207

  };

  return MaxValue[targetType][targetPrecision];
}


/////////////////////////////////////////////////////////////////////
// Check that the source value will fit in the target in
// the following cases:
//
// Source      Target
// ----------  ----------
// INTEGER     NUMERIC(n)
// NUMERIC(m)  NUMERIC(n), where m > n
// FLOAT       NUMERIC(n)
//////////////////////////////////////////////////////////////////////
ex_expr::exp_return_type checkPrecision(Int64 source,
					Lng32 sourceLen,
                                        short sourceType,
                                        Lng32 sourcePrecision,
                                        Lng32 sourceScale,
                                        short targetType,
                                        Lng32 targetPrecision,
                                        Lng32 targetScale,
                                        CollHeap *heap,
                                        ComDiagsArea** diagsArea,
                                        ULng32 flags)
{
  if (targetPrecision > 0)  { //special case - don't check precision
    // If the source is not an interval and the target is not an interval
    // nor an integer and the source is either a float, integer, or bigger
    if ((sourceType >= REC_MIN_NUMERIC) &&
        (sourceType <= REC_MAX_NUMERIC) &&
        (targetType >= REC_MIN_BINARY_NUMERIC) &&
        (targetType <= REC_MAX_BINARY_NUMERIC) &&
        ((sourceType < REC_MIN_BINARY_NUMERIC) ||
         (sourceType > REC_MAX_BINARY_NUMERIC) ||
         (sourcePrecision == 0) ||
         (sourcePrecision > targetPrecision)))  {
      //
      // We've satisfied the above criteria.  Check that the source value
      // will fit in the target NUMERIC.
      //
      if (targetPrecision <= 18)

      if ((source < getMinDecValue(targetPrecision, targetType)) ||
          (source > getMaxDecValue(targetPrecision)) ) {
        ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                              (char*)&source, sizeof(Int64), sourceType,
                              sourceScale, targetType, flags);
        return ex_expr::EXPR_ERROR;
      }
    }
    else
      if (((sourceType >= REC_MIN_INTERVAL) &&
           (sourceType <= REC_MAX_INTERVAL) &&
           (targetType >= REC_MIN_INTERVAL) &&
           (targetType <= REC_MAX_INTERVAL)) ) {

        // Always validate interval-to-interval conversions. It is
        // possible that the source was produced by an arithmetic
        // operator. Arithmetic operators do not validate their
        // results, so the cast of the result must do so even if
        // the source and target types, precisions and scales are
        // identical.

	// Do not validate interval-interval conversion if source and target
	// attributes are the same and the source value is MAX or MIN for
	// its binary storage datatype(ex. SHRT_MIN for 2 byte storage).
	// This is done to 'fix' a problem where the source values are
	// sometimes set up to be binary MIN or MAX values when keys
	// are being built. The validation out here treats them to be
	// invalid values and the query fails. This case can happen 
	// when partitioning keys are being built to access sql/mp table
	// partitions. 
	// Do not validate if the contents are binary MIN or MAX.
	// The contents need to be checked before doing the scale down.
	// This whole check is kind of a half kludge and
	// maybe we can come up with a better solution at a later time.
        if (sourcePrecision == targetPrecision &&
            sourceScale == targetScale &&
            sourceType == targetType) {
	  
          switch (sourceLen) {
            case SQL_SMALL_SIZE:
              if (source == SHRT_MIN || source == SHRT_MAX)
                return ex_expr::EXPR_OK;
              break;
            case SQL_INT_SIZE:
              if (source == INT_MIN || source == INT_MAX)
                return ex_expr::EXPR_OK;
              break;
            case SQL_LARGE_SIZE:
              if (source == LLONG_MIN || source == LLONG_MAX)
                return ex_expr::EXPR_OK;
              break;
            default:
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    (char*)&source, sourceLen, sourceType,
                                    sourceScale, targetType, flags);
              return ex_expr::EXPR_ERROR;
          }
        }

        Int64 scaleDownValue = 1;
        for (Int32 i = 1; i<=sourceScale; i++)
          scaleDownValue *= 10;

        if (((source/scaleDownValue) <
                   getMinIntervalValue(targetPrecision, targetType)) ||
          ((source/scaleDownValue) >
                   getMaxIntervalValue(targetPrecision, targetType))) {
            ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                 (char*)&source, sourceLen, sourceType,
                                  sourceScale, targetType, flags);
            return ex_expr::EXPR_ERROR;
        }
      }

      // 
      // Numeric to Interval
      //
    if (((sourceType >= REC_MIN_NUMERIC) &&
	(sourceType <= REC_MAX_NUMERIC) &&
           (targetType >= REC_MIN_INTERVAL) &&
           (targetType <= REC_MAX_INTERVAL)) &&
        ((sourceType < REC_MIN_BINARY_NUMERIC) || // ??
         (sourceType > REC_MAX_BINARY_NUMERIC) || // ??
         (sourcePrecision == 0) || // ??
         (sourcePrecision > ((targetType == REC_INT_SECOND) ?
                       (targetPrecision + targetScale) : targetPrecision))))  {
         //(sourcePrecision > targetPrecision)))  {

      if (targetType == REC_INT_SECOND) {
        // The precision of INTERVAL SECOND type is only for the integer
        // part, while the precision of other interval type is the number
        // of digits for entire value. Since interval is represented as
        // numeric, the conversion is really an assignment. Thus, add
        // target precision scale to check for overflow. See
        // IntervalType::getPrecision().
        // Don't get confused, which I did, if you see that the source scale
        // does not match to the target scale. The source could get its
        // scale from the original value at codeGen,
        // see ExpGenerator::matchScales() and ExpGenerator::scaleBy10x().
        // Because of the up or down scaling, the source should have the
        // right scale and can be assigned to target directly by now.
        // Maybe we should use target scale at codeGen instead.

        targetPrecision += targetScale;
      }

      // if hit, either invalid precision or need to expand the matrix
      // in getMinIntervalValue() and getMaxIntervalValue()
      assert(targetPrecision >= 0 && targetPrecision < 19);

      if ((source < getMinIntervalValue(targetPrecision, targetType)) ||
          (source > getMaxIntervalValue(targetPrecision, targetType)) ) {
        ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                             (char*)&source, sourceLen, sourceType,
                              sourceScale, targetType, flags);
        return ex_expr::EXPR_ERROR;
      }
    } 

      // 
      // Interval to Numeric
      //
    if ((sourceType >= REC_MIN_INTERVAL) &&
         (sourceType <= REC_MAX_INTERVAL) &&
        (targetType >= REC_MIN_BINARY_NUMERIC) &&
        (targetType <= REC_MAX_BINARY_NUMERIC) &&
         (sourcePrecision > targetPrecision))  {

      if ((source < getMinDecValue(targetPrecision, targetType)) ||
          (source > getMaxDecValue(targetPrecision)) ) {
        ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                             (char*)&source, sourceLen, sourceType,
                              sourceScale, targetType, flags);
        return ex_expr::EXPR_ERROR;
      }
    }
  }
  return ex_expr::EXPR_OK;
}


//////////////////////////////////////////////////////////////////
// This function sets the minimum decimal value.  It looks at
// targetType to determine if the target is signed or unsigned.
// If signed, the routine generates a string of 9's and the
// sign bit is set.  If unsigned, a string of 0's is generated.
// The function assumes that targetType is one of the following: 
//   REC_DECIMAL_UNSIGNED (150)
//   REC_DECIMAL_LSE (152).
///////////////////////////////////////////////////////////////////

void setMinDecValue(char *target,
                    Lng32 targetLen,
                    short targetType)
  {
     Lng32 currPos = 0;
     if (targetType == REC_DECIMAL_UNSIGNED)
       {  // Target is unsigned so generate zeros.
         while (currPos < targetLen)
           {
             target[currPos++] = '0';
           }
       }
     else
       {  // Assume target is signed so generate nines and set the sign bit.
         while (currPos < targetLen)
           {
             target[currPos++] = '9';
           }
         target[0] |= 0200;
       }
  }


//////////////////////////////////////////////////////////////////
// This function sets the maximum value that can fit into a
// decimal type specified by the arguement.
///////////////////////////////////////////////////////////////////

void setMaxDecValue(char *target,
                    Lng32 targetLen)
{
  Lng32 currPos = 0;
  while (currPos < targetLen)
    {
      target[currPos++] = '9';
    }
}

//////////////////////////////////////////////////////////////////
// Function to convert an exact numeric to decimal.  Actually, 
// the function converts those exact numerics that will fit into an
// int64 to decimal.
///////////////////////////////////////////////////////////////////

ex_expr::exp_return_type convExactToDec(char *target,
                                        Lng32 targetLen,
                                        short targetType,
                                        Int64 source,
                                        CollHeap *heap,
                                        ComDiagsArea** diagsArea,
                                        Lng32 * dataConversionErrorFlag,
                                        ULng32 flags)
  {
    if (source < getMinDecValue(targetLen, targetType))
      {
        if (dataConversionErrorFlag != 0)
          {
            setMinDecValue(target, targetLen, targetType);
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
          }
        else
          {
	    if (targetType == REC_DECIMAL_UNSIGNED)
	      {
		ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
	      }
	    else
	      {
		ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     (char*)&source, sizeof(source),
                                      REC_BIN64_SIGNED, 0, targetType, flags);
	      }
	    
            return ex_expr::EXPR_ERROR;
          }
      }
    else if (source > getMaxDecValue(targetLen))
      {
        if (dataConversionErrorFlag != 0)
          {
            setMaxDecValue(target, targetLen);
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
          }
        else
          {
            ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                 (char*)&source, sizeof(source),
                                  REC_BIN64_SIGNED, 0, targetType, flags);
            return ex_expr::EXPR_ERROR;
          }
      }
    else
      {
        // Set target to source.
        if (convInt64ToDec(target,
                           targetLen,
                           source,
                           heap,
                           diagsArea) != ex_expr::EXPR_OK)
          {
            return ex_expr::EXPR_ERROR;
          }
      }
    return ex_expr::EXPR_OK;
  }


///////////////////////////////////////////////
// find the first non blank character
///////////////////////////////////////////////
char * str_find_first_nonpad(char *s, Lng32 len, char padChar) {
  for (Lng32 i = 0; i < len; i++)
    if (s[i] != padChar) 
      return &s[i];
  return 0;
};

///////////////////////////////////////////////
// find the first non blank wide character
///////////////////////////////////////////////
NAWchar * wc_str_find_first_nonblank(NAWchar *s, Lng32 len) {
  for (Lng32 i = 0; i < len; i++)
    if (s[i] != unicode_char_set::space_char())
      return &s[i];
  return 0;
};


////////////////////////////////////////////////
// find the first non zero(character 0) character
////////////////////////////////////////////////
char*  str_find_first_nonzero(char* s, Lng32 len) {
  for (Lng32 i = 0; i< len; i++)
    if (s[i] != '0')
      return &s[i];
  return 0;
}

void setVCLength(char * VCLen, Lng32 VCLenSize, ULng32 value) {
  if (VCLenSize == sizeof(short)) {
    assert(value <= USHRT_MAX);
    unsigned short temp = (unsigned short)value;
    str_cpy_all(VCLen, (char *) &temp, VCLenSize);
  }
  else
    str_cpy_all(VCLen, (char *) &value, VCLenSize);
}; 

////////////////////////////////////////////////////////////////////
// the global conversion routine
////////////////////////////////////////////////////////////////////

typedef charBuf* (*unicodeToChar_FP)(
	const NAWcharBuf&, 
	CollHeap*, 
	charBuf*&, NABoolean, NABoolean);

///////////////////////////////////////////////
// Unicode to single byte string 
///////////////////////////////////////////////
ex_expr::exp_return_type
unicodeToSByteTarget(
	 unicodeToChar_FP conv_func, // convert function pointer
	 char * source,
	 Lng32 sourceLen,
	 char * target,
	 Lng32 targetLen,
         char * varCharLen,      // NULL if the target is of fix length
         Lng32 varCharLenSize,    
	 CollHeap *heap,
	 ComDiagsArea** diagsArea,
         Lng32 * dataConversionErrorFlag,
         NABoolean allowInvalidCodePoint = TRUE,
         NABoolean padSpace = FALSE 
		         ) 
{
    ex_expr::exp_return_type retcode = ex_expr::EXPR_OK;
    Lng32 copyLen, convertedLen;

    const NAWcharBuf wBuf((NAWchar*)source, sourceLen/BYTES_PER_NAWCHAR, heap);
    charBuf *cBuf = NULL;

    cBuf = (*conv_func)(wBuf, heap, cBuf, TRUE, allowInvalidCodePoint);

    if (cBuf) {
       convertedLen = cBuf -> getStrLen();

       copyLen = (convertedLen < targetLen) ? convertedLen : targetLen;

       str_cpy_all(target, (const char*)cBuf->data(), copyLen);
       
       NADELETE(cBuf, charBuf, heap);
    } else {
       convertedLen = 0;
       copyLen = 0;

       if ( allowInvalidCodePoint == FALSE )
       {
          char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
          ExRaiseSqlError(heap, diagsArea, EXE_INVALID_CHAR_IN_TRANSLATE_FUNC,NULL,NULL,NULL,NULL,"UNICODE","ISO88591",stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
          retcode = ex_expr::EXPR_ERROR;
       }
    }

    if ( varCharLen )
       setVCLength(varCharLen, varCharLenSize, copyLen);

    if (targetLen < convertedLen )
    {
      NAWchar* first_nonblank = wc_str_find_first_nonblank(
	(NAWchar*)(&source[targetLen*BYTES_PER_NAWCHAR]),
        sourceLen/BYTES_PER_NAWCHAR - targetLen);
      
      if (first_nonblank)  // if truncated portion isn't all blanks
        {
        if (dataConversionErrorFlag) // want conversion flag instead of warning?
          {
          // yes - determine whether target is greater than or less than source
          if (*first_nonblank < unicode_char_set::space_char() )  
                            // note assumption: UNICODE character set
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
          else
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
          }
        else
          // no - raise a warning
          ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
      }
    } else {
      if ( padSpace == TRUE && targetLen > convertedLen ) 
        str_pad(&target[convertedLen], targetLen - convertedLen, ' ');
    }
    return retcode;
}
  
///////////////////////////////////////////////
// Unicode to multiple byte string 
///////////////////////////////////////////////
ex_expr::exp_return_type
unicodeToMByteTarget(
	 unicodeToChar_FP conv_func, // conversion function pointer
	 char * source,
	 Lng32 sourceLen,
	 char * target,
	 Lng32 targetLen,
         Lng32 targetPrecision,
         Lng32 targetScale,
         char * varCharLen,      // NULL if the target is of fix length
         Lng32 varCharLenSize,    
	 CollHeap *heap,
	 ComDiagsArea** diagsArea,
         Lng32 * dataConversionErrorFlag,
         NABoolean allowInvalidCodePoint = TRUE,
         NABoolean padSpace = FALSE 
			) 
{
    ex_expr::exp_return_type retcode = ex_expr::EXPR_OK;

    Lng32 copyLen = 0, convertedLen = 0;
    Lng32 num_input_chars = sourceLen/BYTES_PER_NAWCHAR;

    const NAWcharBuf wBuf((NAWchar*)source, num_input_chars, heap);
    charBuf *cBuf = NULL;

    cBuf = (conv_func)(wBuf, heap, cBuf, FALSE, allowInvalidCodePoint);

    if (cBuf) {
       convertedLen = cBuf -> getStrLen();

       copyLen = (convertedLen < targetLen) ? convertedLen : targetLen;

       if ( targetScale == SQLCHARSETCODE_UTF8 )
       {
          // Call lightValidateUTF8Str() to ensure we don't copy partial chars
          // or more chars than specified by target precision.
          Lng32 max_num_out_chars = copyLen;
          if ( targetPrecision && (targetPrecision < num_input_chars) )
                max_num_out_chars = targetPrecision;
          copyLen = lightValidateUTF8Str((const char*)cBuf->data(),
                                         copyLen, max_num_out_chars, FALSE);
       }
       str_cpy_all(target, (const char*)cBuf->data(), copyLen);
       
       NADELETE(cBuf, charBuf, heap);
    } else {
       convertedLen = 0;
       copyLen = 0;

       if ( allowInvalidCodePoint == FALSE )
       {
          char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
          ExRaiseSqlError(heap, diagsArea, EXE_INVALID_CHAR_IN_TRANSLATE_FUNC);
          if( *diagsArea ) {
	    if ( targetScale == SQLCHARSETCODE_UTF8 )
              *(*diagsArea) << DgString0("UNICODE") << DgString1("UTF8") << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
            else
              *(*diagsArea) << DgString0("UNICODE") << DgString1("SJIS") << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
          }
          retcode = ex_expr::EXPR_ERROR;
       }
    }

    if ( varCharLen )
       setVCLength(varCharLen, varCharLenSize, copyLen);

    if (copyLen < convertedLen)
      {
        // Since WideCharToMultiByte() does not tell how many characters
        // are converted, we simply report a rounded error. We can not tell
        // if it is rounded up or down. 5/10/98
        // TBD - if needed some day: If only blanks are truncated, don't
        // generate an error.

        if (dataConversionErrorFlag) 
         *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED;
        else
          ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
      }
      // If requested, blank pad so we don't leave garbage at end of target buf
      if ( padSpace == TRUE && targetLen > copyLen ) 
           str_pad(&target[copyLen], targetLen - copyLen, ' ');

   return retcode;
}

// helper method to convert from one single byte or variable-length encoding
// to another single byte or variable-length encoding. This method does not
// handle UCS2 sources or targets (it's also not designed for UTF-16, if
// we ever support that). It does handle things like ISO8859-1 to UTF-8
// and UTF-8 to UTF-8.

ex_expr::exp_return_type convCharToChar(
     char *source,
     Lng32 sourceLen,
     short sourceType,
     Lng32 sourcePrecision,
     Lng32 sourceScale,
     char *target,
     Lng32 targetLen,
     short targetType,
     Lng32 targetPrecision,
     Lng32 targetScale,
     CollHeap *heap,
     ComDiagsArea** diagsArea,
     Lng32 *dataConversionErrorFlag,
     Lng32 *actualTargetLen,
     Lng32 blankPadResult,
     Lng32 ignoreTrailingBlanksInSource,
     Lng32 allowInvalidCodePoint)
{
  char       *intermediateStr = NULL;
  Lng32      intermediateStrLen = 0;
  const int  stackBufferLen = 512;
  char       stackBuffer[stackBufferLen];
  char       *firstUntranslatedChar = NULL;
  UInt32     outputDataLen = 0;
  UInt32     translatedCharCnt = 0;
  Lng32      overflowWarningRaised = 0;
  

  if (sourceScale == SQLCHARSETCODE_UNKNOWN ||
      targetScale == SQLCHARSETCODE_UNKNOWN)
    {
      // can't convert from or to an unknown charset
      ExRaiseSqlError(heap, diagsArea, EXE_INTERNAL_ERROR);
      return ex_expr::EXPR_ERROR;
    }

  if (sourceScale != SQLCHARSETCODE_UTF8 &&
      targetScale != SQLCHARSETCODE_UTF8)
    {
      // neither source nor target are UTF-8, we need to do an
      // intermediate conversion to UTF-8
      intermediateStrLen =
        CharInfo::getMaxConvertedLenInBytes((CharInfo::CharSet) sourceScale,
                                            sourceLen,
                                            CharInfo::UTF8);
      if (intermediateStrLen <= stackBufferLen)
        intermediateStr = stackBuffer;
      else
        intermediateStr = new (heap) char[intermediateStrLen];
    }
  
  if (sourceScale != SQLCHARSETCODE_UTF8)
    {
      // convert from source to intermediate UTF-8 string or directly
      // to the UTF8 output buffer
      
      char *utf8Tgt = target;
      Lng32 utf8TgtLen = targetLen;
      
      if (intermediateStr)
        {
          utf8Tgt = intermediateStr;
          utf8TgtLen = intermediateStrLen;
        }

      int rc = 0;
      char * input_to_scan = source;
      Lng32  input_length  = sourceLen;
      
      if (sourceLen == 0)
          firstUntranslatedChar = source;
      else
          rc = LocaleToUTF8(cnv_version1,
                            source,
                            sourceLen, 
                            utf8Tgt,
                            utf8TgtLen,
                            convertCharsetEnum(sourceScale),
                            firstUntranslatedChar,
                            &outputDataLen,
                            FALSE,
                            &translatedCharCnt);
      
      if (rc && rc != CNV_ERR_BUFFER_OVERRUN)
        {
          ExeErrorCode errCode = EXE_INVALID_CHAR_IN_TRANSLATE_FUNC;
          
          if (rc != CNV_ERR_INVALID_CHAR)
            errCode = EXE_INTERNAL_ERROR;
          
          ExRaiseSqlError(heap, diagsArea, errCode);
          if(errCode == EXE_INVALID_CHAR_IN_TRANSLATE_FUNC)
          {
            char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
            *(*diagsArea) << DgString0(scaleToString(sourceScale)) << DgString1(scaleToString(targetScale)) << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
          }
          if (intermediateStr && intermediateStr != stackBuffer)
            NADELETEBASIC(intermediateStr, heap);
          return ex_expr::EXPR_ERROR;
        }
      
      if (rc || (targetPrecision && targetPrecision < (Lng32) translatedCharCnt))
        {
          Lng32 canIgnoreOverflowChars   = FALSE;
          Lng32 remainingScanStringLen = 0;

          if (rc == 0)
            {
              // We failed because the target has too many characters. Find
              // the first offending character.
              input_to_scan = utf8Tgt;
              input_length  = outputDataLen;
              outputDataLen = lightValidateUTF8Str(utf8Tgt,
                                                   (Int32)outputDataLen,
                                                   (Int32)targetPrecision,
                                                   ignoreTrailingBlanksInSource);
              assert((Int32)outputDataLen >= 0);
              firstUntranslatedChar = &utf8Tgt[outputDataLen];
            }
          else
            {
              assert(rc == CNV_ERR_BUFFER_OVERRUN);
            }

          if (ignoreTrailingBlanksInSource)
            {
              // check whether the characters from firstUntranslatedChar onwards are all blanks
              remainingScanStringLen = input_length - (firstUntranslatedChar - input_to_scan);
              canIgnoreOverflowChars = 
                !(str_find_first_nonpad(firstUntranslatedChar, remainingScanStringLen, ' '));
            }

          if (!canIgnoreOverflowChars)
            if (dataConversionErrorFlag) // want conversion flag instead of warning?
              {
                // yes - determine whether target is greater than or less than source
                if (*(unsigned char *)firstUntranslatedChar < ' ')  // note assumption: ASCII blank is used
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                else
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
              }
            else
              {
                // no - raise a warning
                ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
                overflowWarningRaised = 1;
              }
        }

      if (intermediateStr)
        intermediateStrLen = outputDataLen;
      else if (actualTargetLen)
        *actualTargetLen = outputDataLen;
    } // end sourceScale != SQLCHARSETCODE_UTF8
  
  if (targetScale != SQLCHARSETCODE_UTF8)
    {
      // convert from intermediate UTF-8 string or directly from
      // source to a non-UTF8 target
      char *src2 = (intermediateStr ? intermediateStr : source);
      Lng32 src2Len = (intermediateStr ? intermediateStrLen : sourceLen);

      if ( sourceScale == SQLCHARSETCODE_UTF8 )
         src2Len = Attributes::trimFillerSpaces( src2
                                               , sourcePrecision
                                               , src2Len
                                               , (CharInfo::CharSet)sourceScale
                                               );
      int rc = 0;

      if (src2Len == 0)
        {
          outputDataLen = translatedCharCnt = 0;
          firstUntranslatedChar = src2;
        }
      else
          rc = UTF8ToLocale(cnv_version1,
                            src2,
                            src2Len,
                            target,
                            targetLen,
                            convertCharsetEnum(targetScale),
                            firstUntranslatedChar,
                            &outputDataLen,
                            FALSE, 
                            allowInvalidCodePoint,
                            &translatedCharCnt,
                            (allowInvalidCodePoint ?
                             CharInfo::getReplacementCharacter((CharInfo::CharSet) targetScale) : NULL));
      
      if (rc)
        {
          Lng32 canIgnoreOverflowChars   = FALSE;

          if (ignoreTrailingBlanksInSource && rc == CNV_ERR_BUFFER_OVERRUN)
            {
              Lng32 remainingSourceStringLen = src2Len - (firstUntranslatedChar - src2);
              // check whether the characters from firstUntranslatedChar onwards are all blanks
              canIgnoreOverflowChars = 
                !(str_find_first_nonpad(firstUntranslatedChar, remainingSourceStringLen, ' '));
            }

          if (!canIgnoreOverflowChars)
            {
              // want conversion flag instead of warning?
              if (dataConversionErrorFlag && (rc == CNV_ERR_BUFFER_OVERRUN ||
                                              rc == CNV_ERR_INVALID_CHAR))
                {
                  // yes - determine whether target is greater than or less than source
                  if (*(unsigned char *)firstUntranslatedChar < ' ')  // note assumption: ASCII blank is used
                    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                  else
                    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                }
              else
                {
                  // no, raise error or warning
                  if (rc == CNV_ERR_BUFFER_OVERRUN)
                    {
                      if (!overflowWarningRaised)
                        ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
                    }
                  else
                    {
                      ExeErrorCode errCode = EXE_INVALID_CHAR_IN_TRANSLATE_FUNC;
                      
                      if (rc != CNV_ERR_INVALID_CHAR)
                        errCode = EXE_INTERNAL_ERROR;
                      
                      ExRaiseSqlError(heap, diagsArea, errCode);
                      if(errCode == EXE_INVALID_CHAR_IN_TRANSLATE_FUNC)
                      {
                        char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN ];
                        *(*diagsArea) << DgString0(scaleToString(sourceScale)) << DgString1(scaleToString(targetScale)) << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
                      }
                      if (intermediateStr && intermediateStr != stackBuffer)
                        NADELETEBASIC(intermediateStr, heap);
                      return ex_expr::EXPR_ERROR;
                    }
                }
            }
        }
  
      if (intermediateStr && intermediateStr != stackBuffer)
        NADELETEBASIC(intermediateStr, heap);

      // max. char count should be enforced only for UTF-8 data values for now
      // and the target is not a UTF-8 value, validate this assumption here
      assert (!(targetPrecision && targetPrecision < (Lng32) translatedCharCnt));
    } // end targetScale != SQLCHARSETCODE_UTF8
  else if (sourceScale == SQLCHARSETCODE_UTF8)
    {
      // both source and target charsets are UTF-8; do a byte copy, but also check
      // character length semantics, if necessary
      outputDataLen = targetLen;
      if (sourceLen < targetLen)
        outputDataLen = sourceLen;

      NABoolean needToIgnoreFillerBlanksInSource = 
          (sourcePrecision && DFS2REC::isSQLFixedChar(sourceType) &&
                              DFS2REC::isAnyVarChar(targetType));

      Int32 precisionToCheck = sourcePrecision ? sourcePrecision : targetPrecision;
      if ( targetPrecision && targetPrecision < sourcePrecision )
           precisionToCheck = targetPrecision;

      if ( needToIgnoreFillerBlanksInSource )
      {
         if ( precisionToCheck > 0 ) 
            outputDataLen = lightValidateUTF8Str(source,
                                                 outputDataLen,
                                                 precisionToCheck,
                                                 ignoreTrailingBlanksInSource);
         if ((Int32)outputDataLen < 0)
         {
             // source string is not valid UTF-8
             ExRaiseSqlError(heap, diagsArea, EXE_INVALID_CHAR_IN_TRANSLATE_FUNC);
             char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
             *(*diagsArea) << DgString0(scaleToString(sourceScale)) << DgString1(scaleToString(targetScale)) << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
             return ex_expr::EXPR_ERROR;
         }
      }
      str_cpy_all(target, source, outputDataLen);

      if (targetLen < sourceLen ||
          (targetPrecision && targetPrecision < (sourcePrecision ? sourcePrecision : sourceLen)))
        {
          // Check for truncation of whole or partial characters and for violation of
          // a max. number of characters in the target

          Lng32 relevantCharsGotTruncated = FALSE;

          if ( ! needToIgnoreFillerBlanksInSource ) // If we didn't call this before now
             outputDataLen = lightValidateUTF8Str(target,
                                                  outputDataLen,
                                                  precisionToCheck,
                                                  ignoreTrailingBlanksInSource);

          if ((Lng32) outputDataLen < sourceLen)
            {
              if ((Int32)outputDataLen < 0)
                {
                  // source string is not valid UTF-8
                  ExRaiseSqlError(heap, diagsArea, EXE_INVALID_CHAR_IN_TRANSLATE_FUNC);
                  char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
                  *(*diagsArea) << DgString0(scaleToString(sourceScale)) << DgString1(scaleToString(targetScale)) << DgString2(stringToHex(hexstr,sizeof(hexstr),source,sourceLen));
                  return ex_expr::EXPR_ERROR;
                }

              // not all bytes of the source got copied, check whether any relevant
              // information got truncated
              if (ignoreTrailingBlanksInSource)
                {
                  Lng32 remainingSourceStringLen = sourceLen - outputDataLen;
                  // check whether the characters from first truncated char onwards are all blanks
                  relevantCharsGotTruncated = 
                    (str_find_first_nonpad(&(source[outputDataLen]),
                                           remainingSourceStringLen, ' ') != NULL);
                }
              else
                relevantCharsGotTruncated = TRUE;
            }

          if (relevantCharsGotTruncated)
            {
              if (dataConversionErrorFlag) // want conversion flag instead of warning?
                {
                  char *firstUntranslatedChar = &source[outputDataLen];
                  
                  // yes - determine whether target is greater than or less than source
                  if (*(unsigned char *)firstUntranslatedChar < ' ')  // note assumption: ASCII blank is used
                    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                  else
                    *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                }
              else
                {
                  // no - raise a warning
                  ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
                }
            }
        }
    } // end both source and target are UTF-8
  
  // blank-pad and set remaining output parameters
  if (blankPadResult && (Lng32) outputDataLen < targetLen)
    {
      str_pad(&target[outputDataLen], targetLen-(Lng32)outputDataLen, ' ');
      outputDataLen = targetLen;
    }

  if (actualTargetLen)
    *actualTargetLen = outputDataLen;

  return ex_expr::EXPR_OK;
}


////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////
//                                                                //
//                the global conversion routine                   //
//                                                                //
////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////


ex_expr::exp_return_type
convDoIt(char * source,
	 Lng32 sourceLen,
	 short sourceType,
	 Lng32 sourcePrecision,
	 Lng32 sourceScale,
	 char * target,
	 Lng32 targetLen,
	 short targetType,
	 Lng32 targetPrecision,
	 Lng32 targetScale,
         char * varCharLen,      // NULL if not a varChar
         Lng32 varCharLenSize,    // 0 if not a varChar
	 CollHeap *heap,
	 ComDiagsArea** diagsArea,
	 ConvInstruction index,
         Lng32 * dataConversionErrorFlag,
	 ULng32 flags) {

  UInt32 rc;

  // convDoIt main code
  static const unsigned short limits[] = {   1,    3,    7,    15,    31,   
					     63,  127,  255,   511,  1023, 
					     2047, 4095, 8191, 16383, 32767}; 

  // To compute 10^scale . scale is the fractional precision for Intervals,
  // valid range 0-6 (the trailing zeroes would "assert" on invalid values)
  static const Int64 tenToPowerOf[] = { 1, 10, 100, 1000, 10000, 
					100000, 1000000, 0, 0, 0, 0 };

  // variable used for float operation. Specified in "pragma refligned..."
  float  *floatSrcPtr,  *floatTgtPtr;
  double *doubleSrcPtr, *doubleTgtPtr;


  floatSrcPtr  = (float *)source;
  doubleSrcPtr = (double *)source;
  floatTgtPtr  = (float *)target;
  doubleTgtPtr = (double *)target;

  NABoolean leftPad = FALSE;
  NABoolean allowSignInInterval = FALSE;
  ULng32 tempFlags = 0;
  if (flags)
    {
      if (flags & CONV_LEFT_PAD)
	leftPad = TRUE;
      if (flags & CONV_ALLOW_SIGN_IN_INTERVAL)
	allowSignInInterval = TRUE;
      //tempFlags must be passed to any recursive calls to convdoit 
      //within this method and methods that call ExRaiseDetailSqlError.
      //Also must be passed to ExRaiseDetailedSqlError.
      if(flags & CONV_CONTROL_LOOPING)
        tempFlags = CONV_CONTROL_LOOPING;
      if(flags & CONV_INTERMEDIATE_CONVERSION)
        tempFlags |= CONV_INTERMEDIATE_CONVERSION;

      if(flags & CONV_TREAT_ALL_SPACES_AS_ZERO)
        tempFlags |= CONV_TREAT_ALL_SPACES_AS_ZERO;
    }

  if (index == CONV_UNKNOWN ||
      index == CONV_UNKNOWN_LEFTPAD) {
    ex_conv_clause tempClause;

    if (index == CONV_UNKNOWN_LEFTPAD)
      leftPad = TRUE;

    index = tempClause.findInstruction(sourceType, 
                                       sourceLen, 
                                       targetType, 
                                       targetLen, 
                                       sourceScale-targetScale);
  };

  switch (index) {

  case CONV_BPINTU_BPINTU: 
    {
      if (*(unsigned short *)source > limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = *(unsigned short *)source;
      }
    }
    break;

  case CONV_BIN16S_BPINTU: 
    {
      if (*(short *)source < 0)
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = 0;
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
        }
        else
        {
          ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
          return ex_expr::EXPR_ERROR;
        }
      }
      else if (*(unsigned short *)source > limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = (unsigned short) *(short *)source;
      }
    }

  case CONV_BIN8S_BIN8S:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(Int8 *)target = *(Int8 *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(Int8 *)source,
			     sourceLen,
		             sourceType,
		             sourcePrecision,
                             sourceScale,
		             targetType,
		             targetPrecision,
                             targetScale,
		             heap,
		             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(Int8 *)target = *(Int8 *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_BIN8U_BIN8U:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(UInt8 *)target = *(UInt8 *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(UInt8 *)source,
                             sourceLen,
                             sourceType,
                             sourcePrecision,
                             sourceScale,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(UInt8 *)target = *(UInt8 *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
    break;

  case CONV_BIN8S_BIN8U:
    {
      if (*(Int8 *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt8 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            {
              *(UInt8 *)target = *(Int8 *)source;
            }
          else
            {
              if (checkPrecision((Int64)*(Int8 *)source,
                                 sourceLen,
                                 sourceType,
                                 sourcePrecision,
                                 sourceScale,
                                 targetType,
                                 targetPrecision,
                                 targetScale,
                                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(UInt8 *)target = *(Int8 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN8U_BIN8S:
    {
      if (*(UInt8 *)source > CHAR_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int8 *)target = CHAR_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Int8 *)target = *(UInt8 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(UInt8 *)source,
				 sourceLen,
                                 sourceType,
                                 sourcePrecision,
                                 sourceScale,
		                 targetType,
                                 targetPrecision,
                                 targetScale,
                                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Int8 *)target = *(UInt8 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;
    
  case CONV_BIN8S_BIN16S:
    {
      *(Int16 *)target = *(Int8 *)source;
    }
  break;

  case CONV_BIN8U_BIN16U:
    {
      *(UInt16 *)target = *(UInt8 *)source;
    }
  break;
 
  case CONV_BIN8U_BIN16S:
    {
      *(Int16 *)target = *(UInt8 *)source;
    }
  break;

  case CONV_BIN8S_BIN32S:
    {
      *(Int32 *)target = *(Int8 *)source;
    }
  break;

  case CONV_BIN8S_BIN64S:
    {
      *(Int64 *)target = *(Int8 *)source;
    }
  break;

  case CONV_BIN8U_BIN32U:
    {
      *(UInt32 *)target = *(UInt8 *)source;
    }
  break;
  
  case CONV_BIN8U_BIN64U:
    {
      *(UInt64 *)target = *(UInt8 *)source;
    }
  break;
  
  case CONV_BIN16U_BIN8S:
    {
      if (*(UInt16 *)source > CHAR_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int8 *)target = CHAR_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Int8 *)target = (Int8) *(UInt16 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(UInt16 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Int8 *)target = (Int8) *(UInt16 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN16S_BIN8U:
    {
      if (*(Int16 *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt8 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Int16 *)source > UCHAR_MAX)
        {
          if (dataConversionErrorFlag != 0)
            {
              *(UInt8 *)target = UCHAR_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            {
              *(UInt8 *)target = (UInt8) *(Int16 *)source;
            }
          else
            {
              if (checkPrecision((Int64)*(Int16 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(UInt8 *)target = (UInt8) *(Int16 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN16S_BIN8S:
    {
      if (*(Int16 *)source < CHAR_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int8 *)target = CHAR_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Int16 *)source > CHAR_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int8 *)target = CHAR_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Int8 *)target = (Int8) *(Int16 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(Int16 *)source,
				 sourceLen,
	                         sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Int8 *)target = (Int8) *(Int16 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN16U_BIN8U:
    {
      if (*(UInt16 *)source > UCHAR_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt8 *)target = UCHAR_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(UInt8 *)target = (UInt8) *(UInt16 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(UInt16 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(UInt8 *)target = (UInt8) *(UInt16 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_NUMERIC_BIN8S:
  case CONV_NUMERIC_BIN8U:
    {
      // convert source to smallint and detect data conversion error.
      if (dataConversionErrorFlag)
        *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_OK;
      Int16 temp;
      ex_expr::exp_return_type rc =
        convDoIt(source,
                 sourceLen,
                 sourceType,
                 sourcePrecision,
                 sourceScale,
                 (char*)&temp,
                 sizeof(Int16),
                 (index == CONV_NUMERIC_BIN8S 
                  ? REC_BIN16_SIGNED : REC_BIN16_UNSIGNED),
                 targetPrecision,
                 targetScale,
                 NULL, // varCharLen
                 0,    // varCharLenSize
                 heap,
                 diagsArea,
                 CONV_UNKNOWN,
                 dataConversionErrorFlag,
                 0);
      if (rc == ex_expr::EXPR_ERROR)
        return ex_expr::EXPR_ERROR;
      
      if ((! dataConversionErrorFlag) ||
          (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_OK))
        {
          // no conversion error when converting to smallint.
          // Now check to see if there is an error converting to tinyint.
          rc = convDoIt((char*)&temp,
                        sizeof(Int16),
                        (index == CONV_NUMERIC_BIN8S 
                         ? REC_BIN16_SIGNED : REC_BIN16_UNSIGNED),
                        targetPrecision,
                        targetScale,
                        target,
                        targetLen,
                        targetType,
                        targetPrecision,
                        targetScale,
                        NULL, // varCharLen
                        0,    // varCharLenSize
                        heap,
                        diagsArea,
                        CONV_UNKNOWN,
                        dataConversionErrorFlag,
                        0);
          if (rc == ex_expr::EXPR_ERROR)
            return ex_expr::EXPR_ERROR;
        }
      else // data conversion error. Move tinyint max/min to target.
        {
          if (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN)
            {
              if (index == CONV_NUMERIC_BIN8S)
                *(Int8 *)target = CHAR_MIN;
              else
                *(UInt8 *)target = 0;
            }
          else if (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX)
            {
              if (index == CONV_NUMERIC_BIN8S)
                *(Int8 *)target = CHAR_MAX;
              else
                *(UInt8 *)target = UCHAR_MAX;
            }
        }
    }
    break;

  case CONV_BIN8S_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 (Int64) *(Int8 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN8U_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 (Int64) *(UInt8 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN16S_BIN16S:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(short *)target = *(short *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(short *)source,
			     sourceLen,
		             sourceType,
		             sourcePrecision,
                             sourceScale,
		             targetType,
		             targetPrecision,
                             targetScale,
		             heap,
		             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(short *)target = *(short *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;
    
  case CONV_BIN16S_BIN16U: 
    {
      if (*(short *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(unsigned short *)target = *(short *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(short *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(unsigned short *)target = *(short *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN16S_BIN32S: 
    {
      *(Lng32 *)target = *(short *)source;
    }
  break;

  case CONV_BIN16S_BIN32U:
    {
      if (*(short *)source < 0) 
        {
         if (dataConversionErrorFlag != 0)  // Capture error in variable?
           {
             *(ULng32 *)target = 0;
             *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
           }
         else
           {
             ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
             return ex_expr::EXPR_ERROR;
           }
        }
      else
        { // Set the target value.
          *(ULng32 *)target = *(short *)source;
        }
    }
  break;

  case CONV_BIN16S_BIN64S: 
    {
      *(Int64 *)target = *(short *)source;
    }
  break;
 
  case CONV_BIN16S_DECU:
  case CONV_BIN16S_DECS:
    {
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         (Int64) *(short *)source,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;

  case CONV_BIN16S_FLOAT32:
    {
      //      *(float *)target = *(short *)source;
      *floatTgtPtr = *(short *)source;
    }
  break;
 
  case CONV_BIN16S_FLOAT64: 
    {
      //      *(double *)target = *(short *)source;
      *doubleTgtPtr = *(short *)source;
    }
  break;

  case CONV_BIN16S_BIGNUMU: {
    if (*(short *)source < 0) {
      ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
      return ex_expr::EXPR_ERROR;
    };
  };
  // no break! from here on CONV_BIN16S_BIGNUMU is identical with
  // CONV_BIN16S_BIGNUM

  case CONV_BIN16S_BIGNUM: {
    return convInt64ToBigNum(target,
			     targetLen,
			     (Int64)*(short *)source,
			     heap,
			     diagsArea,
                             tempFlags);
  };
  break;

  case CONV_BIN16S_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 (Int64) *(short *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN16U_BPINTU: 
    {
      if (*(unsigned short *)source > limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = *(unsigned short *)source;
      }
    }
    break;

  case CONV_BIN16U_BIN16S:
    {
      if (*(unsigned short *)source > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(short *)target = *(unsigned short *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(unsigned short *)source,
				 sourceLen,
                                 sourceType,
                                 sourcePrecision,
                                 sourceScale,
		                 targetType,
                                 targetPrecision,
                                 targetScale,
                                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(short *)target = *(unsigned short *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;
    
  case CONV_BIN16U_BIN16U:
    {
    if (dataConversionErrorFlag != 0)
      {
        *(unsigned short *)target = *(unsigned short *)source;
      }
    else
      {
        if (checkPrecision((Int64)*(unsigned short *)source,
			   sourceLen,
                           sourceType,
                           sourcePrecision,
                           sourceScale,
                           targetType,
                           targetPrecision,
                           targetScale,
                           heap,
                           diagsArea,
                           tempFlags) == ex_expr::EXPR_OK)
          {
            *(unsigned short *)target = *(unsigned short *)source;
          }
        else
          {
            return ex_expr::EXPR_ERROR;
          }
      }
    }
  break;
      
  case CONV_BIN16U_BIN32S: {
    *(Lng32 *)target = *(unsigned short *)source;
  };
  break;

  case CONV_BIN16U_BIN32U: {
    *(ULng32 *)target = *(unsigned short *)source;
  };
  break;
      
  case CONV_BIN16U_BIN64S: {
    *(Int64 *)target = *(unsigned short *)source;
  };
  break;

  case CONV_BIN16U_DECS:
    // covers conversion to DECS and DECU (see exp_fixup.cpp)
    {
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         (Int64) *(unsigned short *)source,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;


  case CONV_BIN16U_FLOAT32: {
    *floatTgtPtr = *(unsigned short *)source;
  };
  break;
 
  case CONV_BIN16U_FLOAT64: {
    *doubleTgtPtr = *(unsigned short *)source;
  };
  break;
 
  case CONV_BIN16U_BIGNUM: {
    return convInt64ToBigNum(target,
			     targetLen,
			     (Int64)*(unsigned short *)source,
			     heap,
			     diagsArea,
                             tempFlags);
  };
  break;

  case CONV_BIN16U_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 (Int64) *(unsigned short *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN32S_BIN16S:
    {
      if (*(Lng32 *)source < SHRT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Lng32 *)source > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(short *)target = (short) *(Lng32 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(Lng32 *)source,
				 sourceLen,
	                         sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(short *)target = (short) *(Lng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN32S_BPINTU: 
    {
      if (*(Lng32 *)source < 0)
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = 0;
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
        }
        else
        {
          ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
          return ex_expr::EXPR_ERROR;
        }
      }
      else if (*(Lng32 *)source > (Lng32)limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = (unsigned short) *(Lng32 *)source;
      }
    }
    break;
  
  case CONV_BIN32S_BIN16U:
    {
      if (*(Lng32 *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Lng32 *)source > USHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = USHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = (unsigned short) *(Lng32 *)source;
            }
          else
            {
              if (checkPrecision((Int64)*(Lng32 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(unsigned short *)target = (unsigned short) *(Lng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN32S_BIN32S:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(Lng32 *)target = *(Lng32 *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(Lng32 *)source,
			     sourceLen,
                             sourceType,
                             sourcePrecision,
                             sourceScale,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(Lng32 *)target = *(Lng32 *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_BIN32S_BIN32U:
    {
      if (*(Lng32 *)source < 0) 
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            {
              *(ULng32 *)target = *(Lng32 *)source;
            }
          else
            {
              if (checkPrecision((Int64)*(Lng32 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(ULng32 *)target = *(Lng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN32S_BIN64S: 
    {
      *(Int64 *)target = *(Lng32 *)source;
    }
  break;

  case CONV_BIN32S_DECU:
  case CONV_BIN32S_DECS:
    {
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         (Int64) *(Lng32 *)source,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;

  case CONV_BIN32S_FLOAT32: {
    *floatTgtPtr = (float)*(Lng32 *)source;
  };
  break;
 
  case CONV_BIN32S_FLOAT64: {
    *doubleTgtPtr = (double)*(Lng32 *)source;
  };
  break;

  case CONV_BIN32S_BIGNUMU: {
    if (*(Lng32 *)source < 0) {
      ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
      return ex_expr::EXPR_ERROR;
    };
  };
  // no break! from here on CONV_BIN32S_BIGNUMU is identical with
  // CONV_BIN32S_BIGNUM

  case CONV_BIN32S_BIGNUM: {
    return convInt64ToBigNum(target,
			     targetLen,
			     (Int64)*(Lng32 *)source,
			     heap,
			     diagsArea,
                             tempFlags);
  };
  break;

  case CONV_BIN32S_ASCII: {
    if (convInt64ToAscii(target,
		         targetLen,
                         targetPrecision,
                         targetScale,
		         (Int64) *(Lng32 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
		         diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;
  
  case CONV_BIN32U_BPINTU: 
    {
      if (*(ULng32 *)source > (ULng32)limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = (unsigned short) *(ULng32 *)source;
      }
    }
    break;
  case CONV_BIN32U_BIN16S:
    {
      if (*(ULng32 *)source > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(short *)target = (short) *(ULng32 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(ULng32 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(short *)target = (short) *(ULng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN32U_BIN16U:
    {
      if (*(ULng32 *)source > USHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = USHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(unsigned short *)target = (unsigned short) *(ULng32 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(ULng32 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(unsigned short *)target = (unsigned short) *(ULng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;
  
  case CONV_BIN32U_BIN32S:
    {
      if (*(ULng32 *)source > INT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Lng32 *)target = *(ULng32 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(ULng32 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Lng32 *)target = *(ULng32 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN32U_BIN32U:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(ULng32 *)target = *(ULng32 *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(ULng32 *)source,
			     sourceLen,
                             sourceType,
                             sourcePrecision,
                             sourceScale,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(ULng32 *)target = *(ULng32 *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_BIN32U_BIN64S: 
    {
      *(Int64 *)target = (Int64)(*(ULng32 *)source);
    }
  break;

  case CONV_BIN32U_DECS:
  // covers conversion to DECS and DECU (see exp_fixup.cpp)
     {
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         (Int64) *(ULng32 *)source,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;

  case CONV_BIN32U_FLOAT32:
    {
      *floatTgtPtr = (float)*(ULng32 *)source;
    }
  break;
 
  case CONV_BIN32U_FLOAT64: 
    {
      *doubleTgtPtr = (double)*(ULng32 *)source;
    }
  break;

  case CONV_BIN32U_BIGNUM:
    {
      return convInt64ToBigNum(target,
			       targetLen,
			       (Int64)*(ULng32 *)source,
			       heap,
			       diagsArea,
                               tempFlags);
    }
  break;

  case CONV_BIN32U_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 (Int64) *(ULng32 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN64S_BPINTU: 
    {
      if (*(Int64 *)source < 0)
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = 0;
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
        }
        else
        {
          ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
          return ex_expr::EXPR_ERROR;
        }
      }
      else if (*(Int64 *)source > (Int64)limits[targetPrecision-1])
      {
        if (dataConversionErrorFlag != 0)
        {
          *(unsigned short *)target = limits[targetPrecision-1];
          *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
        }
        else
        {
          ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                                sourceLen, sourceType, sourceScale,
                                targetType, tempFlags);
          return ex_expr::EXPR_ERROR;
        }
      }
      else
      {
        *(unsigned short *)target = (unsigned short) *(Int64 *)source;
      }
    }
    break;

  case CONV_BIN64S_BIN16S:
    {
      if (*(Int64 *)source < SHRT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Int64 *)source > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags, targetLen, targetScale,
                                    targetPrecision, sourcePrecision);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(short *)target = (short) *(Int64 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision(*(Int64 *)source,                 
				 sourceLen,
                                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(short *)target = (short) *(Int64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64S_BIN16U:
    {
      if (*(Int64 *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Int64 *)source > USHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = USHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(unsigned short *)target = (unsigned short) *(Int64 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision(*(Int64 *)source,
				 sourceLen,
                                 sourceType,
                                 sourcePrecision,
                                 sourceScale,
                                 targetType,
                                 targetPrecision,
                                 targetScale,
                                 heap,
                                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(unsigned short *)target = (unsigned short) *(Int64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64S_BIN32S:
    {
      if (*(Int64 *)source < INT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (*(Int64 *)source > INT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Lng32 *)target = (Lng32) *(Int64 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision(*(Int64 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Lng32 *)target = (Lng32) *(Int64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64S_BIN32U:
    {
      if (*(Int64 *)source < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR; 
            }
        }
      else if (*(Int64 *)source > UINT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = UINT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR; 
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(ULng32 *)target = (ULng32) *(Int64 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision(*(Int64 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(ULng32 *)target = (ULng32) *(Int64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64S_BIN64S:
    {
      if ((dataConversionErrorFlag != 0) ||
            checkPrecision(*(Int64 *)source,
			   sourceLen,
                           sourceType,
                           sourcePrecision,
                           sourceScale,
                           targetType,
                           targetPrecision,
                           targetScale,
                           heap,
                           diagsArea,
                           tempFlags) == ex_expr::EXPR_OK)
        {
          *(Int64 *)target = *(Int64 *)source;
        }
      else
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;

  case CONV_BIN64S_BIN64U:
    {
      if (*(Int64 *)source < 0) 
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt64 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            {
              *(UInt64 *)target = *(Int64 *)source;
            }
          else
            {
              if (checkPrecision(*(Int64 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(UInt64 *)target = *(Int64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64U_BIN64U:
    {
      if (dataConversionErrorFlag != 0)
        {
          *(UInt64 *)target = *(UInt64 *)source;
        }
      else
        {
          if (checkPrecision((Int64)*(UInt64 *)source,
			     sourceLen,
                             sourceType,
                             sourcePrecision,
                             sourceScale,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             tempFlags) == ex_expr::EXPR_OK)
            {
              *(UInt64 *)target = *(UInt64 *)source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_BIN64U_BIN64S:
    {
      if (*(UInt64 *)source > LLONG_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int64 *)target = LLONG_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          if (dataConversionErrorFlag != 0)
            { // Set the target value.
              *(Int64 *)target = *(UInt64 *)source;
            }
          else
            { // Check target precision. Then set target value.
              if (checkPrecision((Int64)*(UInt64 *)source,
				 sourceLen,
		                 sourceType,
		                 sourcePrecision,
                                 sourceScale,
		                 targetType,
		                 targetPrecision,
                                 targetScale,
		                 heap,
		                 diagsArea,
                                 tempFlags) == ex_expr::EXPR_OK)
                {
                  *(Int64 *)target = *(UInt64 *)source;
                }
              else
                {
                  return ex_expr::EXPR_ERROR;
                }
            }
        }
    }
  break;

  case CONV_BIN64S_DECU:
  case CONV_BIN64S_DECS:
    {
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         *(Int64 *)source,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }
  break;

  case CONV_BIN64S_FLOAT32: {
    *floatTgtPtr = (float) *(Int64 *)source;
  };
  break;

  case CONV_BIN64S_FLOAT64: {
    *doubleTgtPtr = (double) *(Int64 *)source;
  };
  break;

  case CONV_BIN64U_FLOAT32: {
    *floatTgtPtr = (float) *(UInt64 *)source;
  };
  break;

  case CONV_BIN64U_FLOAT64: {
    *doubleTgtPtr = (double) *(UInt64 *)source;
  };
  break;

  case CONV_BIN64U_BIGNUM: {
    return convUInt64ToBigNum(target,
			     targetLen,
			     *(UInt64 *) source,
			     heap,
			     diagsArea,
                             tempFlags);
  };
  break;

  case CONV_BIN64S_BIGNUMU: {
    if (*(Int64 *)source < 0) {
      ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
      return ex_expr::EXPR_ERROR;
    };
  };
  // no break! from here on CONV_BIN64S_BIGNUMU is identical with
  // CONV_BIN64S_BIGNUM

  case CONV_BIN64S_BIGNUM: {
    return convInt64ToBigNum(target,
			     targetLen,
			     *(Int64 *) source,
			     heap,
			     diagsArea,
                             tempFlags);
  };
  break;

  case CONV_BIN64S_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 *(Int64 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_BIN64U_ASCII: {
    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 *(Int64 *)source,
			 sourceScale,
			 varCharLen,
			 varCharLenSize,
			 ' ', // filler character
			 FALSE,
			 leftPad,
                         TRUE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_DECS_BIN32U:
    // This case covers conversions
    //   from {decu, decs}
    //   to {bpintu, bin16u, bin32u, bignum}
    {
      Int64 int64source;
      if (convDecToInt64(int64source,
                         source,
                         sourceLen,
                         heap,
                         diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
      return convDoIt((char *) &int64source,
		      (Lng32) sizeof(Int64),
		      (short) REC_BIN64_SIGNED,
		      0, // sourcePrecision
		      0, // sourceScale
		      target,
		      targetLen,
		      targetType,
		      targetPrecision,
		      targetScale,
		      NULL, // varCharLen
		      0,    // varCharLenSize
		      heap,
		      diagsArea,
                      CONV_UNKNOWN,
                      dataConversionErrorFlag,
                      tempFlags | CONV_INTERMEDIATE_CONVERSION);  
    }
  break;

  case CONV_DECS_BIN32S:
    // This case covers conversions
    //   from {decu, decs}
    //   to {bin16s, bin32s}
    {
      Int64 int64source;
      if (convDecToInt64(int64source,
                         source,
                         sourceLen,
                         heap,
                         diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
      return convDoIt((char *) &int64source,
		      (Lng32) sizeof(Int64),
		      (short) REC_BIN64_SIGNED,
		      0, // sourcePrecision
		      0, // sourceScale
		      target,
		      targetLen,
		      targetType,
		      targetPrecision,
		      targetScale,
		      NULL, // varCharLen
		      0,    // varCharLenSize
		      heap,
		      diagsArea,
                      CONV_UNKNOWN,
                      dataConversionErrorFlag,
                      tempFlags | CONV_INTERMEDIATE_CONVERSION);  
    }
  break;

  case CONV_DECS_BIN64S:
    {
      Int64 int64source;
      if (convDecToInt64(int64source,
		         source,
		         sourceLen,
		         heap,
		         diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
      return convDoIt((char *) &int64source,
		      (Lng32) sizeof(Int64),
		      (short) REC_BIN64_SIGNED,
		      0, // sourcePrecision
		      0, // sourceScale
		      target,
		      targetLen,
		      targetType,
		      targetPrecision,
		      targetScale,
		      NULL, // varCharLen
		      0,    // varCharLenSize
		      heap,
		      diagsArea,
                      CONV_BIN64S_BIN64S,
                      dataConversionErrorFlag,
                      tempFlags | CONV_INTERMEDIATE_CONVERSION);
    }
  break;

  case CONV_DECS_DECU:
  case CONV_DECS_DECS:
    {
      Int64 intermediate = 0;
      if (convDecToInt64(intermediate,
                         source,
                         sourceLen,
                         heap,
                         diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
      if (convExactToDec(target,
                         targetLen,
                         targetType,
		         intermediate,
		         heap,
		         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          return ex_expr::EXPR_ERROR;
        }
    }  
  break;

  case CONV_DECS_FLOAT32: {
    Int64 intermediate;
    if (convDecToInt64(intermediate,
		       source,
		       sourceLen,
		       heap,
		       diagsArea,
                       tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    *floatTgtPtr = (float) intermediate;
  };
  break;

  case CONV_DECS_FLOAT64: {
    Int64 intermediate;
    if (convDecToInt64(intermediate,
		       source,
		       sourceLen,
		       heap,
		       diagsArea,
                       tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    *doubleTgtPtr = (double) intermediate;
  };
  break;

  case CONV_DECS_ASCII: {
    Int64 intermediate;
    if (convDecToInt64(intermediate,
		       source,
		       sourceLen,
		       heap,
		       diagsArea,
                       tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if (convInt64ToAscii(target,
			 targetLen,
                         targetPrecision,
                         targetScale,
			 intermediate,
			 ((targetType == REC_DECIMAL_LS) ? 0 : sourceScale),
			 varCharLen,
			 varCharLenSize,
			 ((targetType == REC_DECIMAL_LS) ? '0' : ' '),
			 (targetType == REC_DECIMAL_LS),
			 ((targetType == REC_DECIMAL_LS) ? TRUE : leftPad),
                         FALSE,
			 heap,
			 diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_FLOAT32_BPINTU: 
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < 0)
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > limits[targetPrecision-1])
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = limits[targetPrecision-1];
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          unsigned short unsignedShortSource = (unsigned short) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = unsignedShortSource;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          *(unsigned short *)target = unsignedShortSource;
        }
    }
    break;
  case CONV_FLOAT32_BIN16S:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < SHRT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType,tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(short *)target = (short) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_BIN16U:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > USHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = USHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(unsigned short *)target = (unsigned short) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_BIN32S:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < INT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > INT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(Lng32 *)target = (Lng32) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_BIN32U:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > UINT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = UINT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(ULng32 *)target = (ULng32) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_BIN64S:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < LLONG_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int64 *)target = LLONG_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > LLONG_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int64 *)target = LLONG_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(Int64 *)target = int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_BIN64U:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt64 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > ULLONG_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt64 *)target = ULLONG_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          UInt64 int64source = (UInt64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(UInt64 *)target = (UInt64) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT32_DECU:
  case CONV_FLOAT32_DECS:
    {
      float floatsource = *floatSrcPtr;
      if (floatsource < getMinDecValue(targetLen, targetType))
        {
          if (dataConversionErrorFlag != 0)
            {
              setMinDecValue(target, targetLen, targetType);
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (floatsource > getMaxDecValue(targetLen))
        {
          if (dataConversionErrorFlag != 0)
            {
              setMaxDecValue(target, targetLen);
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) floatsource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              float floatsource2 = int64source;
              if (floatsource2 > floatsource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (floatsource2 < floatsource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if (convInt64ToDec(target,
                             targetLen,
                             int64source,
                             heap,
                             diagsArea) != ex_expr::EXPR_OK)
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;
  case CONV_FLOAT32_FLOAT32: {
    *floatTgtPtr = *floatSrcPtr;
  };
  break;

  case CONV_FLOAT32_FLOAT64: {
    *doubleTgtPtr = (double)*floatSrcPtr;
  };
  break;

  case CONV_FLOAT32_ASCII: {
    if (targetLen < SQL_REAL_MIN_DISPLAY_SIZE) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
        source, sourceLen, sourceType, sourceScale, targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    };
    
    //    double intermediate = (double) *(float *) source;
    double intermediate = (double) *floatSrcPtr;

    if (convFloat64ToAscii(target,
		           targetLen,
                           targetPrecision,
                           targetScale,
		           intermediate,
		           SQL_REAL_FRAG_DIGITS,
		           varCharLen,
		           varCharLenSize,
                           leftPad) != 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
         source, sourceLen, sourceType, sourceScale, targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    }
  };
  break;

  case CONV_FLOAT64_BPINTU: 
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < 0)
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > limits[targetPrecision-1])
        {
          if (dataConversionErrorFlag != 0)
            {
              *(unsigned short *)target = limits[targetPrecision-1];
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          unsigned short unsignedShortSource = (unsigned short) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = unsignedShortSource;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          *(unsigned short *)target = unsignedShortSource;
        }
    }
    break;

  case CONV_FLOAT64_BIN16S:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < SHRT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > SHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(short *)target = SHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(short *)target = (short) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_BIN16U:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > USHRT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(unsigned short *)target = USHRT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(unsigned short *)target = (unsigned short) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_BIN32S:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < INT_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > INT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Lng32 *)target = INT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            } 
       else {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(Lng32 *)target = (Lng32) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_BIN32U:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > UINT_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(ULng32 *)target = UINT_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(ULng32 *)target = (ULng32) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_BIN64S:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < LLONG_MIN)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int64 *)target = LLONG_MIN;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > LLONG_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(Int64 *)target = LLONG_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(Int64 *)target = int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_BIN64U:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < 0)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt64 *)target = 0;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > ULLONG_MAX)
        {
          if (dataConversionErrorFlag != 0)  // Capture error in variable?
            {
              *(UInt64 *)target = ULLONG_MAX;
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          UInt64 int64source = (UInt64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if ((dataConversionErrorFlag != 0) ||
                checkPrecision(int64source,
			       sourceLen,
                               sourceType,
                               sourcePrecision,
                               sourceScale,
                               targetType,
                               targetPrecision,
                               targetScale,
                               heap,
                               diagsArea,
                               tempFlags) == ex_expr::EXPR_OK)
            { // Set the target value.
              *(UInt64 *)target = (UInt64) int64source;
            }
          else
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_DECS:
  case CONV_FLOAT64_DECU:
    {
      double doublesource = *doubleSrcPtr;
      if (doublesource < getMinDecValue(targetLen, targetType))
        {
          if (dataConversionErrorFlag != 0)
            {
              setMinDecValue(target, targetLen, targetType);
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else if (doublesource > getMaxDecValue(targetLen))
        {
          if (dataConversionErrorFlag != 0)
            {
        	  setMaxDecValue(target, targetLen);
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
        }
      else
        {
          Int64 int64source = (Int64) doublesource;
          if (dataConversionErrorFlag != 0)
            {
              // Convert back and check for a value change.
              double doublesource2 = int64source;
              if (doublesource2 > doublesource)
                {
                  *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                }
              else
                {
                  if (doublesource2 < doublesource)
                    {
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                    }
                }
            }
          if (convInt64ToDec(target,
                             targetLen,
                             int64source,
                             heap,
                             diagsArea) != ex_expr::EXPR_OK)
            {
              return ex_expr::EXPR_ERROR;
            }
        }
    }
  break;

  case CONV_FLOAT64_FLOAT32:
    {
      short ov = 0;
      double doubleSource = *doubleSrcPtr;
      *floatTgtPtr = MathConvReal64ToReal32(doubleSource, &ov);
      
      if (dataConversionErrorFlag == 0)
	{
	  if (ov)
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
	}
      else
	{
	  if (ov == 1) // overflow
	    {
	      if (doubleSource < 0) // < -FLT_MAX
		{
		  *floatTgtPtr = -FLT_MAX;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
		}
	      else                  // > +FLT_MAX
		{
		  *floatTgtPtr = +FLT_MAX;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
		}
	    } // overflow
	  else if (ov == -1)      // underflow
	    {
	      if (doubleSource < 0)  // > -FLT_MIN
		{
		  *floatTgtPtr = 0;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_UP;
		}
	      else                   // < +FLT_MIN
		{
		  *floatTgtPtr = 0;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
		}
	    } // underflow
	} // data conversion flag
      
    }
  break;

  case CONV_FLOAT64_FLOAT64: 
    {
      short ov = 0;
      //      double doubleSource = *doubleSrcPtr;
      *doubleTgtPtr = MathConvReal64ToReal64(*doubleSrcPtr, &ov);
      if (dataConversionErrorFlag == 0)
	{
	  if (ov)
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, tempFlags);
              return ex_expr::EXPR_ERROR;
            }
	}
      else
	{
	  double doubleTarget = *doubleTgtPtr;

	  if (ov == 1) // overflow
	    {
	      if (doubleTarget < 0) // < -DBL_MAX
		{
		  *doubleTgtPtr = -DBL_MAX;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
		}
	      else                  // > +DBL_MAX
		{
		  *doubleTgtPtr = +DBL_MAX;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
		}
	    } // overflow
	  else if (ov == -1)      // underflow
	    {
	      if (doubleTarget < 0)  // > -DBL_MIN
		{
		  *doubleTgtPtr = 0;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_UP;
		}
	      else                   // < +DBL_MIN
		{
		  *doubleTgtPtr = 0;
		  *dataConversionErrorFlag = 
		    ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
		}
	    } // underflow
	} // data conversion flag
      

  };
  break;

  case CONV_FLOAT64_ASCII: {
    if (targetLen < SQL_REAL_MIN_DISPLAY_SIZE) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
        source, sourceLen, sourceType, sourceScale, targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    };

    if (convFloat64ToAscii(target,
		           targetLen,
                           targetPrecision,
                           targetScale,
		           *doubleSrcPtr,
		           SQL_DOUBLE_PRECISION_FRAG_DIGITS,
		           varCharLen,
		           varCharLenSize,
                           leftPad) != 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
        source, sourceLen, sourceType, sourceScale, targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    }
  };
  break;


  case CONV_BIGNUM_BIN16S:
  case CONV_BIGNUM_BIN16U:
  case CONV_BIGNUM_BIN32S:
  case CONV_BIGNUM_BIN32U: {

    Int64 intermediate;
    Lng32 tempDataConvErrorFlag;
    ex_expr::exp_return_type rc;

    if (dataConversionErrorFlag)
      {
      // want to catch conversion errors in a variable
      tempDataConvErrorFlag
           = convBigNumToInt64AndScale(&intermediate,
                                       source,
                                       sourceLen,
                                       targetScale-sourceScale,
                                       heap);
      }
    else
      {
      // want to use diagsArea to catch errors
      if (convBigNumToInt64(&intermediate,
	             	    source,
			    sourceLen,
			    heap,
			    diagsArea,
                            tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      }

    rc = convDoIt((char *) &intermediate,
	  	    (Lng32) sizeof(Int64),
		    (short) REC_BIN64_SIGNED,
		    0, // sourcePrecision
		    0, // sourceScale
		    target,
		    targetLen,
		    targetType,
		    targetPrecision,
		    targetScale,
		    NULL, // varCharLen
		    0,    // varCharLenSize
		    heap,
		    diagsArea,
                    CONV_UNKNOWN,
                    dataConversionErrorFlag,
                    tempFlags | CONV_INTERMEDIATE_CONVERSION);

    if (dataConversionErrorFlag)
      {
      // This is tricky (sigh):  We must tell our caller what happened
      // during this data conversion, but to do so requires combining
      // error information from two conversions. The possible situations
      // that can occur are as follows:
      //
      // conversion to Int 64   conversion to final type    desired return
      // --------------------   ------------------------    --------------
      //  round down to max       round down to max       round down to max
      //         (if we rounded down to the max 64-bit number,
      //          we know we will round down further to the max
      //          value when going to any 16 or 32 bit number)
      //
      //  round up to min         round up to min         round up to min
      //         (similar)
      //
      //  round down              no error                round down
      //         (can happen due to scaling; in this case we
      //          know the 64-bit result and the final type
      //          result are the same, so we know the final
      //          result was rounded down from the original)
      //
      //  round down              round down to max       round down to max
      //         (after all, we rounded down to the max value)
      //  
      //  round up                no error                round up
      //         (similar to round down/no error case)
      //
      //  round up                round up to max         round up to max
      //         (similar to round down/round down to max case)
      //
      //  no error                no error                no error
      //         (obvious)
      //
      //  no error                round down to max       round down to max
      //         (obvious)
      // 
      //  no error                round up to min         round up to min
      //         (obvious)
      //
      // The other cases can never occur.  (Proof: both routines have the 
      // characteristic that the only possible errors for positive numbers
      // are rounding down, and for negative numbers rounding up.  Conversion
      // preserves sign apart from conversion to zero, but if the Int64
      // result is zero there will be no error on the 2nd conversion.
      // Also, round down and round up can occur only due to
      // scaling, and scaling occurs in convDoIt only when converting from
      // Large Decimal, so round down and round up cannot occur in the 2nd
      // conversion.)
      //
      // Now, inspecting the above chart, we see that the desired result
      // is the same as the 2nd conversion, except possibly when the 2nd 
      // conversion reports no error. But in all those cases, the desired 
      // result is that of the 1st conversion.  So, the following logic 
      // implements the above chart.

      if (*dataConversionErrorFlag == ex_conv_clause::CONV_RESULT_OK)
        *dataConversionErrorFlag = tempDataConvErrorFlag;

      }

    return rc;
      
  };
  break;

  case CONV_BIGNUM_BIN64S: {
    Int64 intermediate;
    if (dataConversionErrorFlag)
      {
      // want conversion errors in a variable
      *dataConversionErrorFlag
           = convBigNumToInt64AndScale(&intermediate,
                                       source,
                                       sourceLen,
                                       targetScale-sourceScale,
                                       heap);     
      }
    else
      {
      // want conversion errors in diagsArea
      if (convBigNumToInt64(&intermediate,
	  		    source,
			    sourceLen,
			    heap,
			    diagsArea,
                            tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;

      if (checkPrecision(intermediate,
			 sourceLen,
                         sourceType,
                         sourcePrecision,
                         sourceScale,
                         targetType,
	                 targetPrecision,
                         targetScale,
                         heap,
                         diagsArea,
                         tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      }
 
    *(Int64 *)target = intermediate;
  };
  break;

  case CONV_BIGNUM_BIN64U: {
    UInt64 intermediate;
    if (dataConversionErrorFlag)
      {
        Int64 intermediateTemp;
      // want conversion errors in a variable
      *dataConversionErrorFlag
           = convBigNumToInt64AndScale(&intermediateTemp,
                                       source,
                                       sourceLen,
                                       targetScale-sourceScale,
                                       heap);     
      }
    else
      {
      // want conversion errors in diagsArea
      if (convBigNumToUInt64(&intermediate,
                             source,
                             sourceLen,
                             heap,
                             diagsArea,
                             tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;

      if (checkPrecision(intermediate,
			 sourceLen,
                         sourceType,
                         sourcePrecision,
                         sourceScale,
                         targetType,
	                 targetPrecision,
                         targetScale,
                         heap,
                         diagsArea,
                         tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      }
 
    *(UInt64 *)target = intermediate;
  };
  break;

  case CONV_BIGNUM_DECU: 
  case CONV_BIGNUM_DECS: {
    if (dataConversionErrorFlag) {
	*dataConversionErrorFlag = 
	  convBigNumToDecAndScale(target,
				  targetLen,
				  source,
				  sourceLen,
                                  sourcePrecision,
				  (index == CONV_BIGNUM_DECU),
				  targetScale - sourceScale,
                                  heap);
      return ex_expr::EXPR_OK;
    }
    else {
      Lng32 tempDataConversionErrorFlag =
	convBigNumToDecAndScale(target,
				targetLen,
				source,
				sourceLen,
                                sourcePrecision,
				(index == CONV_BIGNUM_DECU),
				0, // do not scale
                                heap); 
      if ((tempDataConversionErrorFlag ==
	   ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN) ||
	  (tempDataConversionErrorFlag ==
	   ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX)) {
	ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                              sourceLen, sourceType, sourceScale,
                              targetType, tempFlags);
	return ex_expr::EXPR_ERROR;
      }
      return ex_expr::EXPR_OK;
    };
  };
  break;

  case CONV_BIGNUM_FLOAT32:
  case CONV_BIGNUM_FLOAT64: {

    // We first convert Big Num to Ascii (which itself is done by first converting
    // to Large Dec, then from Large Dec to Ascii), then from Ascii to Float. 
    // (tbd: It would be probably better to convert from Big Num to Float directly)

    Lng32 intermediateLen = sourcePrecision + 1;
    char * intermediate = (char *)heap->allocateMemory(intermediateLen);

    Lng32 errorMark;
    if (*diagsArea)
      errorMark = (*diagsArea)->getNumber(DgSqlCode::ERROR_);
    else 
      errorMark = 0;

    if (convBigNumToAscii(intermediate,
			  intermediateLen,
                          0,
			  source,
			  sourceLen,
                          sourcePrecision,
			  (dataConversionErrorFlag ? sourceScale : 0),
			  NULL, // varCharLen
			  0,    // varCharLenSize
                          leftPad,
			  heap,
                          diagsArea,
                          tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK) {
      //if a EXE_NUMERIC OVERFLOW error was generated during the conversion, 
      //change it to a warning.
      if (*diagsArea) {
        Lng32 errorMark2 = (*diagsArea)->getNumber(DgSqlCode::ERROR_);
        Int32 counter = errorMark2 - errorMark;
        while (counter) {
          if (((*diagsArea)->getErrorEntry(errorMark2 - counter + 1))->
              getSQLCODE() == -EXE_STRING_OVERFLOW) {
            (*diagsArea)->deleteError(errorMark2 - counter);
            ExRaiseSqlWarning(heap, diagsArea, EXE_NUMERIC_OVERFLOW);
          }
          counter--;
        }
      }
      else {
        heap->deallocateMemory((void *)intermediate);
        return ex_expr::EXPR_ERROR;
        }

    }

    // Convert ascii to float.
    ex_expr::exp_return_type rc =
           convDoIt(intermediate,
		    intermediateLen,
		    (short) REC_BYTE_F_ASCII,
		    0, // sourcePrecision
		    SQLCHARSETCODE_ISO88591, // sourceScale
		    target,
		    targetLen,
		    targetType,
		    targetPrecision,
		    targetScale,
		    NULL, // varCharLen
		    0,    // varCharLenSize
		    heap,
		    diagsArea,
                    CONV_UNKNOWN,
                    dataConversionErrorFlag,
                    tempFlags | CONV_INTERMEDIATE_CONVERSION);
    heap->deallocateMemory((void *)intermediate);
    return rc;
  };
  break;

  case CONV_BIGNUM_ASCII: {
    return convBigNumToAscii(target,
			  targetLen,
                          targetPrecision,
			  source,
			  sourceLen,
                          sourcePrecision,
			  sourceScale,
			  varCharLen,
			  varCharLenSize,
			  leftPad,
			  heap,
			  diagsArea,
                          tempFlags);
  };
  break;

  case CONV_BIGNUM_BIGNUM: {
    return convBigNumToBigNum(target,
			      targetLen,
			      targetType,
			      targetPrecision,
			      source,
			      sourceLen,
			      sourceType,
			      sourcePrecision,
			      heap,
			      diagsArea,
                              tempFlags); 
  };
  break;

  case CONV_DECLS_DECLS: {
    if (targetLen < sourceLen) {
      // overflow
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, sourceType, sourceScale,
                            targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    };
    
    // copy first character (which may or may not be a sign)
    target[0] = source[0];
    Lng32 targetIdx = 1;
    if (targetLen > sourceLen) {
      // target is larger, fill in zeros
      str_pad(&target[targetIdx], targetLen - sourceLen, '0');
      targetIdx = targetLen - sourceLen + 1;
    };
    // copy source to target
    str_cpy_all(&target[targetIdx], &source[1], sourceLen - 1);
  };
  break;
  
  case CONV_DECLS_ASCII: {
    return convDecLStoAscii(target,
			    targetLen,
                            targetPrecision,
			    source,
			    sourceLen,
			    sourceScale,
			    heap,
			    diagsArea,
                            tempFlags);
  };
  break;
 
  case CONV_DECLS_DECU: {
// We convert first from REC_DECIMAL_LS to REC_DECIMAL_LSE and then from
// REC_DECIMAL_LSE to REC_DECIMAL_UNSIGNED

// Conversion from REC_DECIMAL_LS to REC_DECIMAL_LSE


 char *intermediateTarget = new (heap) char[targetLen]; 
 Lng32 intermediateTargetLen = targetLen;

 // if the source is REC_DECIMAL_LS, we use the same conversion as for ASCII,
 // but we ignore the targetScale
 if (convAsciiToDec(intermediateTarget,
		    targetType,
                    intermediateTargetLen,
                    ((sourceType == REC_DECIMAL_LS) ? 0 : targetScale),
                    source,
                    sourceLen,
		    0,
                    heap,
                    diagsArea,
                    tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
   {
     NADELETEBASIC(intermediateTarget, heap);
     return ex_expr::EXPR_ERROR;
   }

 if ((targetType == REC_DECIMAL_UNSIGNED) &&
     (intermediateTarget[0] & 0200)) {
   // unsigned decimal can't be negative
   ExRaiseSqlError(heap, diagsArea, EXE_UNSIGNED_OVERFLOW);
   NADELETEBASIC(intermediateTarget, heap);
   return ex_expr::EXPR_ERROR;
 };

// Conversion from REC_DECIMAL_LSE to REC_DECIMAL_UNSIGNED
      Int64 intermediate = 0;
      if (convDecToInt64(intermediate,
                         intermediateTarget,
                         intermediateTargetLen,
                         heap,
                         diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          NADELETEBASIC(intermediateTarget, heap);
          return ex_expr::EXPR_ERROR;
        }
      if (convExactToDec(target,
                         targetLen,
                         targetType,
                         intermediate,
                         heap,
                         diagsArea,
                         dataConversionErrorFlag,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
        {
          NADELETEBASIC(intermediateTarget, heap);
          return ex_expr::EXPR_ERROR;
        }
    NADELETEBASIC(intermediateTarget, heap); 
    return ex_expr::EXPR_OK;
  };
  break;
  case CONV_INTERVALY_INTERVALMO:  // convert years to months
    {
      if (convBinToBinScaleMult(target,
                               targetType,
                               targetLen,
                               targetPrecision,   
                               targetScale,   
                               source,
                               sourceType,
                               sourceLen,
                               sourcePrecision,
                               12,  // multiply years by 12 to get months
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALMO_INTERVALY:
    {
      if (convBinToBinScaleDiv(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale,
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                12,  // divide months by 12 to get years
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALD_INTERVALH:
    {
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale, 
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                24,  // multiply days by 24 to get hours
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALD_INTERVALM:
    {
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale, 
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                24*60,  // multiply days by 24*60 to get minutes
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALD_INTERVALS:
    {
      Int64 scaleFactor = 24*60*60 // multiply days by 24*60*60 to get seconds
	* tenToPowerOf[targetScale];
    
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale, 
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                scaleFactor,  
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALH_INTERVALD:
    {
      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               24,  // divide hours by 24 to get days
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break; 
    
  case CONV_INTERVALH_INTERVALM:
    {
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale, 
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                60,  // multiply hours by 60 to get minutes
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
	return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALH_INTERVALS:
    {
      Int64 scaleFactor = 60 * 60  // multiply hours by 60*60 to get seconds
	* tenToPowerOf[targetScale];
    
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale, 
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                scaleFactor,  
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALM_INTERVALD:
    {
      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               60*24,  // divide minutes by 60*24 to get days
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break; 

  case CONV_INTERVALM_INTERVALH:
    {
      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               60,  // divide minutes by 60 to get hours
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break; 

  case CONV_INTERVALM_INTERVALS:
    {
      Int64 scaleFactor = 60 // multiply minutes by 60 to get seconds
	* tenToPowerOf[targetScale];
    
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale,
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                scaleFactor,  
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALS_INTERVALD:
    {
      Int64 scaleFactor = 60*60*24 // divide seconds by 60*60*24 to get days
	* tenToPowerOf[sourceScale];  // divide again by 10**fraction precision

      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               scaleFactor,  
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
         return ex_expr::EXPR_ERROR;
       return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALS_INTERVALH:
    {
      Int64 scaleFactor = 60*60 // divide seconds by 60*60 to get hours
	* tenToPowerOf[sourceScale];  // divide again by 10**fraction precision
    
      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               scaleFactor,  
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALS_INTERVALM:
    {
      Int64 scaleFactor = 60 // divide seconds by 60 to get minutes
    	* tenToPowerOf[sourceScale];  // divide again by 10**fraction precision

      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               scaleFactor,  
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;

  case CONV_INTERVALS_INTERVALS_DIV:  // second(n) to second(m), n > m
    {
      if (convBinToBinScaleDiv(target,
                               targetType,
                               targetLen,
                               targetPrecision, 
                               targetScale,
                               source,
			       sourceType,
                               sourceLen,
                               sourcePrecision,
                               tenToPowerOf[sourceScale - targetScale],
                               heap,
                               diagsArea,
                               dataConversionErrorFlag,
                               tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;

      return ex_expr::EXPR_OK;
    } 
    break;

  case CONV_INTERVALS_INTERVALS_MULT: // second(n) to second(m), m > n
    {
      if (convBinToBinScaleMult(target,
                                targetType,
                                targetLen,
                                targetPrecision, 
                                targetScale,
                                source,
				sourceType,
                                sourceLen,
                                sourcePrecision,
                                tenToPowerOf[targetScale - sourceScale],
                                heap,
                                diagsArea,
                                dataConversionErrorFlag,
                                tempFlags) != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      return ex_expr::EXPR_OK;
    }
    break;
 
  case CONV_INTERVAL_ASCII: {
    return convIntervalToAscii(source,
                               sourceLen,
                               sourcePrecision, // leading precision
                               sourceScale,     // fraction precision
                               sourceType,
                               target,
                               targetLen,
                               targetPrecision, // max chars allowed or 0
                               varCharLen,
                               varCharLenSize,
			       leftPad,
                               heap,
                               diagsArea);
  };
  break;

  case CONV_INTERVAL_UNICODE: {

    charBuf cBuf(targetLen/BYTES_PER_NAWCHAR, heap);

    ex_expr::exp_return_type ok = 
        convIntervalToAscii(source,
			    sourceLen,
			    sourcePrecision, // leading precision
			    sourceScale,     // fraction precision
			    sourceType,
			    (char*)cBuf.data(),
			    cBuf.getBufSize(), // target buffer size
                            0,
			    varCharLen,
			    varCharLenSize,
			    leftPad,
			    heap,
			    diagsArea
                            );

   if ( ok != ex_expr::EXPR_OK)
     return ex_expr::EXPR_ERROR;

   NAWcharBuf *wBuf = NULL;

   wBuf = ISO88591ToUnicode(cBuf, heap, wBuf);

   if ( wBuf && cBuf.getStrLen() == wBuf->getStrLen() ) {

      str_cpy_all(target, (char*)(wBuf->data()), BYTES_PER_NAWCHAR*(wBuf->getStrLen()));

      if (varCharLenSize != 0 && varCharLen ) 
         double_varchar_length(varCharLen, varCharLenSize);

   } else {
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR,NULL,NULL,NULL,NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      ok = ex_expr::EXPR_ERROR;
   }

   NADELETE(wBuf, NAWcharBuf, heap);

   return ok;

  };
  break;

  case CONV_DATETIME_DATETIME: {
    return convDatetimeDatetime(target,
				targetLen,
				(REC_DATETIME_CODE)targetPrecision,
				targetScale,
				source,
				sourceLen,
				(REC_DATETIME_CODE)sourcePrecision,
				sourceScale,
				heap,
				diagsArea,
 				(short) (flags & CONV_ENABLE_DATETIME_VALIDATION),
				dataConversionErrorFlag);
  };
  break;

  case CONV_DATETIME_ASCII: {
    if (convDatetimeToAscii(target,
			    targetLen,
                            targetPrecision,
			    source,
			    sourceLen,
			    (REC_DATETIME_CODE)sourcePrecision,
			    (short)sourceScale, // fractionprecision
			    varCharLen,
			    varCharLenSize,
			    leftPad,
			    heap,
			    diagsArea) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;
  };
  break;

//
// 6/5/98: added for datetime to unicode 
//
  case CONV_DATETIME_UNICODE: {

    charBuf cBuf(targetLen/BYTES_PER_NAWCHAR, heap);

// to ascii version first
    ex_expr::exp_return_type ok = 
        convDatetimeToAscii((char*)cBuf.data(),
			    cBuf.getBufSize(), // target buffer size
                            0,
			    source,
			    sourceLen,
			    (REC_DATETIME_CODE)sourcePrecision,
			    (short)sourceScale, // fractionprecision
			    varCharLen,
			    varCharLenSize,
			    leftPad,
			    heap,
			    diagsArea
			    );

    if ( ok != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

   NAWcharBuf *wBuf = NULL;

// get the final unicode version
   wBuf = ISO88591ToUnicode(cBuf, heap, wBuf);

   if ( wBuf && cBuf.getStrLen() == wBuf->getStrLen() ) {

      str_cpy_all(target, (char*)(wBuf->data()), BYTES_PER_NAWCHAR*(wBuf->getStrLen()));

// set the varchar length if necessary
      if (varCharLenSize != 0 && varCharLen ) 
         double_varchar_length(varCharLen, varCharLenSize);

      ok = ex_expr::EXPR_OK;
   } else {
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR,NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
      ok = ex_expr::EXPR_ERROR;
   }

   NADELETE(wBuf, NAWcharBuf, heap);

   return ok;

  };
  break;
  
  case CONV_ASCII_BIN8S:
  case CONV_ASCII_BIN8U:
  case CONV_ASCII_BIN16S:
  case CONV_ASCII_BIN16U:
  case CONV_ASCII_BIN32S:
  case CONV_ASCII_BIN32U: {
    Int64 interm;
    if (convAsciiToInt64(interm,
			 targetScale,
			 source,
			 sourceLen,
			 heap,
			 diagsArea,
                         tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    switch (index)
      {
      case CONV_ASCII_BIN8S: {
           if (interm < CHAR_MIN)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<Int8> *)target = CHAR_MIN;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > CHAR_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<Int8> *)target = CHAR_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale, targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<Int8> *)target = (Int8) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<Int8> *)target = (Int8) interm;
               }
             }
           };
           break;
      case CONV_ASCII_BIN8U: {
           if (interm < 0)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<unsigned short> *)target = 0;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > UCHAR_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<UInt8> *)target = UCHAR_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale,
                                         targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<UInt8> *)target = (UInt8) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<UInt8> *)target = (UInt8) interm;
               }
             }
           };
           break;
      case CONV_ASCII_BIN16S: {
           if (interm < SHRT_MIN)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<short> *)target = SHRT_MIN;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > SHRT_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<short> *)target = SHRT_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale, targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<short> *)target = (short) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<short> *)target = (short) interm;
               }
             }
           };
           break;
      case CONV_ASCII_BIN16U: {
           if (interm < 0)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<unsigned short> *)target = 0;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > USHRT_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<unsigned short> *)target = USHRT_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale,
                                         targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<unsigned short> *)target = (unsigned short) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<unsigned short> *)target = (unsigned short) interm;
               }
             }
           };
           break;
      case CONV_ASCII_BIN32S: {
           if (interm < INT_MIN)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<Lng32> *)target = INT_MIN;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > INT_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<Lng32> *)target = INT_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale, targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<Lng32> *)target = (Lng32) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<Lng32> *)target = (Lng32) interm;
               }
             }
           };
           break;
      case CONV_ASCII_BIN32U:  {
           if (interm < 0)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
               {
               *(Target<ULng32> *)target = 0;
               *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_UP_TO_MIN;
               }
             else
               {
               ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                     source, sourceLen, sourceType, sourceScale,
                                     targetType, tempFlags);
               return ex_expr::EXPR_ERROR;
               }
             }
           else if (interm > UINT_MAX)
             {
             if (dataConversionErrorFlag != 0)  // Capture error in variable?
                 {
                   *(Target<ULng32> *)target = UINT_MAX;
                   *dataConversionErrorFlag =
                        ex_conv_clause::CONV_RESULT_ROUNDED_DOWN_TO_MAX;
                 }
               else
                 {
                   ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                         source, sourceLen, sourceType,
                                         sourceScale,
                                         targetType, tempFlags);
                   return ex_expr::EXPR_ERROR;
                 }
             }
           else
             {
             if (dataConversionErrorFlag != 0)
               { // Set the target value.
               *(Target<ULng32> *)target = (ULng32) interm;
               }
             else
               { // Check target precision. Then set target value.
               if ((targetPrecision > 0) &&
                   (checkPrecision(interm,
				   8,
                                   REC_BIN64_SIGNED,
                                   0,
                                   0,
                                   targetType,
                                   targetPrecision,
                                   targetScale,
                                   heap,
                                   diagsArea,
                                   tempFlags) != ex_expr::EXPR_OK))
                  {
                  return ex_expr::EXPR_ERROR;
                  }
                *(Target<ULng32> *)target = (ULng32) interm;
               }
             }
           };
           break;
      default: break;
      }
  };
  break;

//
// 6/3/98: added for Cast() NCHAR extension. 
//
  case CONV_BIN16S_UNICODE:
  case CONV_BIN16U_UNICODE:
  case CONV_BIN32S_UNICODE:
  case CONV_BIN32U_UNICODE:
  case CONV_BIN64S_UNICODE:
  case CONV_FLOAT32_UNICODE: 
  case CONV_FLOAT64_UNICODE:
  case CONV_DECS_UNICODE: 
  case CONV_BIGNUM_UNICODE: 
  {
   ConvInstruction cci = CONV_UNKNOWN; // next switch will change.
   switch (index) {
           case CONV_BIN16S_UNICODE:  cci = CONV_BIN16S_ASCII;break;
           case CONV_BIN16U_UNICODE:  cci = CONV_BIN16U_ASCII;break;
           case CONV_BIN32S_UNICODE:  cci = CONV_BIN32S_ASCII;break;
           case CONV_BIN32U_UNICODE:  cci = CONV_BIN32U_ASCII;break;
           case CONV_BIN64S_UNICODE:  cci = CONV_BIN64S_ASCII;break;
           case CONV_FLOAT32_UNICODE: cci = CONV_FLOAT32_ASCII;break;
           case CONV_FLOAT64_UNICODE: cci = CONV_FLOAT64_ASCII;break;
           case CONV_DECS_UNICODE:    cci = CONV_DECS_ASCII;break;
           case CONV_BIGNUM_UNICODE:  cci = CONV_BIGNUM_ASCII;break;
           default: break;
   }

// get the ascii version first
   charBuf cBuf(targetLen/BYTES_PER_NAWCHAR, heap);

   ex_expr::exp_return_type ok =
             convDoIt(source,
		    sourceLen,
	            sourceType,
		    sourcePrecision,
		    sourceScale,
		    (char*)cBuf.data(),
		    cBuf.getBufSize(), // target buffer size
                    REC_BYTE_F_ASCII,
		    targetPrecision,
	            targetScale,
		    varCharLen,
		    varCharLenSize,
		    heap,
		    diagsArea,
		    cci,
                    0,
                    tempFlags | CONV_INTERMEDIATE_CONVERSION);


   if ( ok == ex_expr::EXPR_ERROR ) 
      return ok;

// refine the length for varchar typed target
   Lng32 final_length;
   if ( varCharLenSize != 0 && varCharLen ) {
     if ( varCharLenSize == sizeof(short) )
         final_length = *(short*)varCharLen;
     else
         final_length = *(Lng32*)varCharLen;

     cBuf.setStrLen(final_length);
   }
      
   NAWcharBuf *wBuf = NULL;

// get the final unicode version
   wBuf = ISO88591ToUnicode(cBuf, heap, wBuf);

   if (wBuf && (wBuf -> getStrLen() == cBuf.getStrLen()) ) {
      str_cpy_all(target, (char*)(wBuf->data()), BYTES_PER_NAWCHAR*(wBuf->getStrLen()));

      if ( varCharLenSize != 0 && varCharLen )
         double_varchar_length(varCharLen, varCharLenSize);

      ok = ex_expr::EXPR_OK;
   } else {
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR, NULL, NULL, NULL, NULL,stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      ok = ex_expr::EXPR_ERROR;
   }

   NADELETE(wBuf, NAWcharBuf, heap);

   return ok;
  };
  break;

// 6/2/98: extend Cast() for NCHAR
  case CONV_UNICODE_BIN16S:
  case CONV_UNICODE_BIN16U:
  case CONV_UNICODE_BIN32S:
  case CONV_UNICODE_BIN32U:
  case CONV_UNICODE_BIN64S:
  case CONV_UNICODE_FLOAT32: 
  case CONV_UNICODE_FLOAT64: 
  case CONV_UNICODE_DEC: 
  case CONV_UNICODE_BIGNUM:
  {

// We make use of the ascii version. Before that we need
// to the ascii version.
   const NAWcharBuf wBuf((NAWchar*)source, sourceLen/BYTES_PER_NAWCHAR, heap);
   charBuf *cBuf = NULL;

   cBuf = unicodeToISO88591(wBuf, heap, cBuf);

// If we have it, make sure all content has been included.
   if (cBuf) {

      if ( cBuf -> getStrLen() == sourceLen/BYTES_PER_NAWCHAR ) {

         ConvInstruction cci = CONV_UNKNOWN;
         switch (index) {
           case CONV_UNICODE_BIN16S:  cci = CONV_ASCII_BIN16S;break;
           case CONV_UNICODE_BIN16U:  cci = CONV_ASCII_BIN16U;break;
           case CONV_UNICODE_BIN32S:  cci = CONV_ASCII_BIN32S;break;
           case CONV_UNICODE_BIN32U:  cci = CONV_ASCII_BIN32U;break;
           case CONV_UNICODE_BIN64S:  cci = CONV_ASCII_BIN64S;break;
           case CONV_UNICODE_FLOAT32: cci = CONV_ASCII_FLOAT32;break;
           case CONV_UNICODE_FLOAT64: cci = CONV_ASCII_FLOAT64;break;
           case CONV_UNICODE_DEC:     cci = CONV_ASCII_DEC;break;
           case CONV_UNICODE_BIGNUM:  cci = CONV_ASCII_BIGNUM;break;
           default: break;
         }

         ex_expr::exp_return_type ok =
             convDoIt((char*)cBuf->data(),
		    cBuf->getStrLen(), // source string length in bytes
	            REC_BYTE_F_ASCII,
		    sourcePrecision,
		    SQLCHARSETCODE_ISO88591,
		    target,
		    targetLen,
		    targetType,
		    targetPrecision,
	            targetScale,
		    NULL, // varCharLen
		    0,    // varCharLenSize
		    heap,
		    diagsArea,
		    cci,
                    0,
                    tempFlags | CONV_INTERMEDIATE_CONVERSION);

         NADELETE(cBuf, charBuf, heap);

         return ok;

      }
   }

   char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
   ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

   return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_ASCII_BIN64S: {
    Int64 intermediate;
    if (convAsciiToInt64(intermediate,
			 targetScale,
			 source,
			 sourceLen,
			 heap,
			 diagsArea,
                         tempFlags) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if (checkPrecision(intermediate,
		       8,
                       REC_BIN64_SIGNED,
                       sourcePrecision,
                       sourceScale,
                       targetType,
	               targetPrecision,
                       targetScale,
		       heap,
		       diagsArea,
                       tempFlags) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    *(Int64 *)target = intermediate;
    };
    break;

  case CONV_ASCII_BIN64U: {
    UInt64 intermediate;
    if (convAsciiToUInt64(intermediate,
			 targetScale,
			 source,
			 sourceLen,
			 heap,
			 diagsArea,
                         tempFlags) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if (checkPrecision(intermediate,
		       8,
                       REC_BIN64_SIGNED,
                       sourcePrecision,
                       sourceScale,
                       targetType,
	               targetPrecision,
                       targetScale,
		       heap,
		       diagsArea,
                       tempFlags) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    *(UInt64 *)target = intermediate;
    };
    break;

  case CONV_ASCII_DEC: {
    // if the source is REC_DECIMAL_LS, we use the same conversion as for ASCII,
    // but we ignore the targetScale
    if (convAsciiToDec(target,
		       targetType,
		       targetLen,
		       ((sourceType == REC_DECIMAL_LS) ? 0 : targetScale),
		       source,
		       sourceLen,
		       0,
		       heap,
		       diagsArea,
                       tempFlags) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if ((targetType == REC_DECIMAL_UNSIGNED) &&
	(target[0] & 0200)) {
      // unsigned decimal can't be negative
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, source,
                            sourceLen, sourceType, sourceScale,
                            targetType, tempFlags);
      return ex_expr::EXPR_ERROR;
    };
  };
  break;

  case CONV_ASCII_FLOAT32: {
    double dintermediate;
    if (convAsciiToFloat64((char*)&dintermediate,
			   source,
			   sourceLen,
			   heap,
			   diagsArea,
                           tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

    if (convDoIt((char*)&dintermediate,
		 sizeof(double),
		 REC_FLOAT64,
		 targetPrecision,
		 targetScale,
		 target,
		 targetLen,
		 targetType,
		 targetPrecision,
		 0, NULL, 0, heap, diagsArea,
		 CONV_UNKNOWN, 0,
                 tempFlags | CONV_INTERMEDIATE_CONVERSION) != ex_expr::EXPR_OK)
      return ex_expr::EXPR_ERROR;

  };
  break;

  case CONV_ASCII_FLOAT64: {
    return convAsciiToFloat64(target,
			      source,
			      sourceLen,
			      heap,
			      diagsArea,
                              tempFlags);
  };
  break;


  case CONV_ASCII_BIGNUM: {
    return convAsciiToBigNum(target,
			     targetLen,
			     targetType,
                             targetPrecision,
			     targetScale,
			     source,
			     sourceLen,
			     heap,
			     diagsArea,
                             tempFlags); 
  

  };
  break;


  case CONV_ASCII_DATETIME: {
     return convAsciiToDatetime(target,
				targetLen,
				(REC_DATETIME_CODE)targetPrecision,
				(short)targetScale, // fractionprecision
				source,
				sourceLen,
				heap,
				diagsArea,
                                flags);
  };
  break;

// 6/2/98: added for Unicode to Datetime conversion.
// This is treated as a special case as we need to call
// convAsciiToDateTime().

  case CONV_UNICODE_DATETIME: {

   const NAWcharBuf wBuf((NAWchar*)source, sourceLen/BYTES_PER_NAWCHAR, heap);
   charBuf *cBuf = NULL;

   cBuf = unicodeToISO88591(wBuf, heap, cBuf);

   if (cBuf) {

      if ( cBuf -> getStrLen() == sourceLen/BYTES_PER_NAWCHAR ) {

         ex_expr::exp_return_type ok =
                        convAsciiToDatetime(target,
					    targetLen,
					    (REC_DATETIME_CODE)targetPrecision,
					    (short)targetScale, // fractionprecision
					    (char*)cBuf->data(),
					    cBuf->getStrLen(), // in bytes
					    heap,
					    diagsArea,
					    0);

         NADELETE(cBuf, charBuf, heap);

         return ok;

      }
   }

   char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
   ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR,NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

   return ex_expr::EXPR_ERROR;

  };
  break;

//
// 6/5/98: added for unicode to interval
//
  case CONV_UNICODE_INTERVAL: 
  {
   const NAWcharBuf wBuf((NAWchar*)source, sourceLen/BYTES_PER_NAWCHAR, heap);
   charBuf *cBuf = NULL;

   cBuf = unicodeToISO88591(wBuf, heap, cBuf);

   if (cBuf) {

      if ( cBuf -> getStrLen() == sourceLen/BYTES_PER_NAWCHAR ) {

         ex_expr::exp_return_type ok =
                        convAsciiToInterval(target,
					    targetLen,
					    targetType,
					    targetPrecision,    // leading precision
					    targetScale,        // fractionprecision
					    (char*)cBuf->data(),
					    cBuf->getStrLen(),  // in bytes
					    allowSignInInterval,
					    heap,
					    diagsArea,
                                            tempFlags | CONV_INTERMEDIATE_CONVERSION);

         NADELETE(cBuf, charBuf, heap);

         return ok;

      }
   }

   char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
   ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_DATETIME_ERROR, NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));
   return ex_expr::EXPR_ERROR;
  };
  break;

  case CONV_ASCII_INTERVAL: {
    return convAsciiToInterval(target,
			       targetLen,
			       targetType,
			       targetPrecision,    // leading precision
			       targetScale,        // fractionprecision
			       source,
			       sourceLen,
			       allowSignInInterval,
			       heap,
			       diagsArea,
                               tempFlags);
  };
  break;

  case CONV_ASCII_F_V:
  case CONV_ASCII_V_V: {
    
    // check for needed character conversions or validations
    if (requiresNoConvOrVal(sourceLen, sourcePrecision, sourceScale,
                            targetLen, targetPrecision, targetScale, index))
      {
        // this case can often be translated into PCODE
        Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
        
        str_cpy_all(target, source, copyLen);
        setVCLength(varCharLen, varCharLenSize, copyLen);

        if (copyLen < sourceLen) 
          {
            char * first_nonblank = str_find_first_nonpad(
                 &source[copyLen], sourceLen - copyLen, ' ');
            
            if (first_nonblank)  // if truncated portion isn't all blanks
              {
                if (dataConversionErrorFlag) // want conversion flag instead of warning?
                  {
                    // yes - determine whether target is greater than or less than source
                    if (*(unsigned char *)first_nonblank < ' ')  // note assumption: ASCII character set
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                    else
                      *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                  }
                else
                  // no - raise a warning
                  ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
              }
          }
      }
    else
      {
        // this case isn't translated into PCODE at this time
        Lng32 convertedDataLen;

        if (convCharToChar(source,
                           sourceLen,
                           sourceType,
                           sourcePrecision,
                           sourceScale,
                           target,
                           targetLen,
                           targetType,
                           targetPrecision,
                           targetScale,
                           heap,
                           diagsArea,
                           dataConversionErrorFlag,
                           &convertedDataLen,
                           FALSE,
                           TRUE,
                           flags & CONV_ALLOW_INVALID_CODE_VALUE)
            != ex_expr::EXPR_OK)
          return ex_expr::EXPR_ERROR;
        setVCLength(varCharLen, varCharLenSize, convertedDataLen);
      }
  };
  break;

// gb2312 -> utf8
// JIRA 1720
  case CONV_GBK_F_UTF8_V:
  {
    int copyLen = 0;
    int convLen = gbkToUtf8( source, sourceLen, target, targetLen);
    if (convLen >= 0) {
      copyLen = convLen; 
      if ( varCharLen )
        setVCLength(varCharLen, varCharLenSize, copyLen);
      //if the target length is not enough, instead of truncate, raise a SQL Error
      if (convLen > targetLen)
        ExRaiseSqlError(heap, diagsArea, EXE_STRING_OVERFLOW);
    }
    else {
      convLen = 0;
      copyLen = 0;
      if ( varCharLen )
        setVCLength(varCharLen, varCharLenSize, copyLen);
      char hexstr[MAX_OFFENDING_SOURCE_DATA_DISPLAY_LEN];
      ExRaiseSqlError(heap, diagsArea, EXE_CONVERT_STRING_ERROR,NULL, NULL, NULL, NULL, stringToHex(hexstr, sizeof(hexstr), source, sourceLen ));

      return ex_expr::EXPR_ERROR;
    }
  };
  break;
// 5/10/98: sjis -> unicode
  case CONV_SJIS_F_UNICODE_F: 
  case CONV_SJIS_F_UNICODE_V: 
  case CONV_SJIS_V_UNICODE_F: 
  case CONV_SJIS_V_UNICODE_V: 
  {
    Lng32 copyLen, convertedLen;
    const charBuf cBuf((unsigned char*)source, sourceLen, heap);
    NAWcharBuf *wBuf = NULL;

    wBuf = sjisToUnicode(cBuf, heap, wBuf);

    if (wBuf) {
       convertedLen = BYTES_PER_NAWCHAR * (wBuf -> getStrLen());

       copyLen = (convertedLen < targetLen) ? convertedLen : targetLen;

       str_cpy_all(target, (char*)(wBuf->data()), copyLen);
       
       if (convertedLen > targetLen)
         {
           NAWchar * first_nonblank =
             wc_str_find_first_nonblank(&((wBuf->data())[targetLen/BYTES_PER_NAWCHAR]),
                                        (convertedLen - targetLen) / BYTES_PER_NAWCHAR);
           
           if (first_nonblank)  // if truncated portion isn't all blanks
             {
               if (dataConversionErrorFlag) // want conversion flag instead of warning?
                 {
                   // yes - determine whether target is greater than or less than source
                   // note assumption: UNICODE character set
                   if (*first_nonblank < unicode_char_set::space_char())  
                     *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                   else
                     *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                 }
               else
                 // no - raise a warning
                 ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
             }
         }

       NADELETE(wBuf, NAWcharBuf, heap);

    } else {
       convertedLen = 0;
       copyLen = 0;
    }
// There is no need to change the char string storage format
//      for Unicode string.

    if ( varCharLen )
       setVCLength(varCharLen, varCharLenSize, copyLen);

    if ( (index == CONV_SJIS_F_UNICODE_F || index == CONV_SJIS_V_UNICODE_F) &&
         copyLen < targetLen )
      wc_str_pad((NAWchar*)(&target[copyLen]), (targetLen - copyLen) >> 1);

  };
  break;

// 6/11/98: ascii -> unicode
  case CONV_UTF8_F_UCS2_V: 
  case CONV_ASCII_UNICODE_F: 
  case CONV_ASCII_UNICODE_V: 
  case CONV_ASCII_TO_ANSI_V_UNICODE: 
  {
    Lng32 copyLen, convertedLen;

    const charBuf cBuf((unsigned char*)source, sourceLen, heap);
    NAWcharBuf *wBuf = NULL;

    if (sourceScale == SQLCHARSETCODE_ISO88591)
       wBuf = ISO88591ToUnicode(cBuf, heap, wBuf);
    else
    {
       Lng32 convertedDataLen;

       if (convCharToChar(source,
                          sourceLen,
                          sourceType,
                          sourcePrecision,
                          sourceScale,
                          target,
                          targetLen,
                          targetType,
                          targetPrecision,
                          targetScale,
                          heap,
                          diagsArea,
                          dataConversionErrorFlag,
                          &convertedDataLen,
                          FALSE,
                          TRUE,
                          flags & CONV_ALLOW_INVALID_CODE_VALUE)
           != ex_expr::EXPR_OK)
         return ex_expr::EXPR_ERROR;
         wBuf = new (heap) NAWcharBuf( (NAWchar *)target, convertedDataLen/BYTES_PER_NAWCHAR, heap);
    }

    if ( index == CONV_ASCII_TO_ANSI_V_UNICODE ) 
      targetLen--; // excluding the null terminator

    if (wBuf) {
       convertedLen = BYTES_PER_NAWCHAR * (wBuf -> getStrLen());

       copyLen = (convertedLen < targetLen) ? convertedLen : targetLen;

       str_cpy_all(target, (char*)(wBuf->data()), copyLen);

       if ( index == CONV_ASCII_UNICODE_F && convertedLen < targetLen )
         wc_str_pad((NAWchar*)(&target[copyLen]), (targetLen - copyLen) >> 1);
       
       if (convertedLen > targetLen)
         {
           NAWchar * first_nonblank =
             wc_str_find_first_nonblank(&((wBuf->data())[targetLen/BYTES_PER_NAWCHAR]),
                                        (convertedLen - targetLen) / BYTES_PER_NAWCHAR);

           if (first_nonblank)  // if truncated portion isn't all blanks
             {
               if (dataConversionErrorFlag) // want conversion flag instead of warning?
                 {
                   // yes - determine whether target is greater than or less than source
                   // note assumption: UNICODE character set
                   if (*first_nonblank < unicode_char_set::space_char())  
                     *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                   else
                     *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                 }
               else
                 // no - raise a warning
                 ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
             }
         }

       NADELETE(wBuf, NAWcharBuf, heap);

    } else {
       convertedLen = 0;
       copyLen = 0;
    }

//      There is no need to change the char string storage format
//      for Unicode string.

    if ( varCharLen && index != CONV_ASCII_TO_ANSI_V_UNICODE )
       setVCLength(varCharLen, varCharLenSize, copyLen);
    
    if ( index == CONV_ASCII_TO_ANSI_V_UNICODE )
     {
        ((NAWchar*)target)[copyLen/BYTES_PER_NAWCHAR] = 0;
     }
  };
  break;

// 12/8/97: Unicode -> ASCII
  case CONV_UNICODE_F_ASCII_F: // unicode -> ascii
  case CONV_UNICODE_V_ASCII_F: // unicode -> ascii
  case CONV_ANSI_V_UNICODE_TO_ASCII_F: // ansi unicode -> ascii

  {
    if (targetScale == (Lng32) SQLCHARSETCODE_UTF8 ||
        targetScale == (Lng32) SQLCHARSETCODE_SJIS)
    {
      return
      unicodeToMByteTarget(
         (targetScale == (Lng32) SQLCHARSETCODE_UTF8) ? unicodeToUtf8 : unicodeToSjis,
         source,
         sourceLen,
         target,
         targetLen,
         targetPrecision,
         targetScale,
         0/*varCharLen*/, 0/*varCharLenSize*/,
         heap,
         diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space*/);
    }
    else
    return
     unicodeToSByteTarget(
	 unicodeToISO88591,
	 source,
	 sourceLen,
	 target,
	 targetLen,
	 0, 0,
	 heap,
	 diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space*/);
  };
  break;

  case CONV_UNICODE_F_ANSI_V: // unicode F -> ansi_v
  case CONV_UNICODE_V_ANSI_V: // unicode V -> ansi_v
    {

     Int32 tempTargetLen = sourceLen;
     char * tempTarget = new (heap) char[tempTargetLen];

     ex_expr::exp_return_type ok = 
       convDoIt(source,
	 sourceLen,
	 sourceType,
	 sourcePrecision,
	 sourceScale,
	 tempTarget,
	 tempTargetLen,
	 REC_BYTE_F_ASCII,
	 targetPrecision,
	 targetScale,
         varCharLen,      // NULL if not a varChar
         varCharLenSize,    // 0 if not a varChar
	 heap,
	 diagsArea,
	 (index==CONV_UNICODE_F_ANSI_V) ?
           CONV_UNICODE_F_ASCII_F : CONV_UNICODE_V_ASCII_F,
         dataConversionErrorFlag,
         tempFlags | CONV_INTERMEDIATE_CONVERSION
            );

     if ( ok == ex_expr::EXPR_OK )  {

      convDoIt(tempTarget,
	 tempTargetLen/BYTES_PER_NAWCHAR,   // the number of bytes in the tempTarget buffer 
	 REC_BYTE_F_ASCII,  // is half that of the original Unicode version.
         targetPrecision,  // we already converted to the target precision
         targetScale,      // and scale
	 target,
	 targetLen,
	 targetType,
	 targetPrecision,
	 targetScale,
         varCharLen,      // NULL if not a varChar
         varCharLenSize,    // 0 if not a varChar
	 heap,
	 diagsArea,
         CONV_ASCII_TO_ANSI_V,
         dataConversionErrorFlag,
         tempFlags | CONV_INTERMEDIATE_CONVERSION
                );
     }

     NADELETEBASIC(tempTarget, heap);
     }

     break;
        
  case CONV_ANSI_V_UNICODE_TO_ASCII_V: // ansi unicode (null terminalted)-> ascii
  {
    NAWchar* w_source = (NAWchar*)source;
    Lng32 w_sourceLen = sourceLen/BYTES_PER_NAWCHAR;

    Lng32 i = 0;
    while ((i < w_sourceLen) && (w_source[i] != 0))
      i++;

    if (i == w_sourceLen) {
      ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
      return ex_expr::EXPR_ERROR;
    };

    sourceLen = i*BYTES_PER_NAWCHAR;
  }

  //fall through

// 6/11/98: Unicode -> ASCII
  case CONV_UCS2_F_UTF8_V:
  
  case CONV_UNICODE_F_ASCII_V: // unicode -> ascii
  case CONV_UNICODE_V_ASCII_V: // unicode -> ascii
  {
    if (targetScale == (Lng32) SQLCHARSETCODE_UTF8 ||
        targetScale == (Lng32) SQLCHARSETCODE_SJIS)
    {
      return
      unicodeToMByteTarget(
         (targetScale == (Lng32) SQLCHARSETCODE_UTF8) ? unicodeToUtf8 : unicodeToSjis,
         source,
         sourceLen,
         target,
         targetLen,
         targetPrecision,
         targetScale,
         varCharLen,
         varCharLenSize,
         heap,
         diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         FALSE);
    }
    else
    return 
    unicodeToSByteTarget(
	 unicodeToISO88591,
	 source,
	 sourceLen,
	 target,
	 targetLen,
         varCharLen,
         varCharLenSize,
	 heap,
	 diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE);
  };
  break;

// 5/14/98: Unicode -> SJIS (V)
  case CONV_UNICODE_F_SJIS_V:  // unicode ->  sjis
  case CONV_UNICODE_V_SJIS_V:  // unicode ->  sjis
  {
    return
    unicodeToMByteTarget(
         unicodeToSjis,
         source,
         sourceLen,
         target,
         targetLen,
         targetPrecision,
         targetScale,
         varCharLen,
         varCharLenSize,
         heap,
         diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE);
  };
  break;

//UR2. Revisit in CharSet project. This case may not be valid anymore.
  case CONV_UNICODE_F_SBYTE_LOCALE_F: // unicode -> single-byte locale
  case CONV_UNICODE_V_SBYTE_LOCALE_F: // unicode -> single-byte locale
  {
    if (targetScale == (Lng32) SQLCHARSETCODE_UTF8 ||
        targetScale == (Lng32) SQLCHARSETCODE_SJIS)
    {
      return
      unicodeToMByteTarget(
         (targetScale == (Lng32) SQLCHARSETCODE_UTF8) ? unicodeToUtf8 : unicodeToSjis,
         source,
         sourceLen,
         target,
         targetLen,
         targetPrecision,
         targetScale,
         0/*varCharLen*/, 0/*varCharLenSize*/,
         heap,
         diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space */);
    }
    else
    return 
    unicodeToSByteTarget(
	 unicodeToISO88591,
	 source,
	 sourceLen,
	 target,
	 targetLen,
	 0, 0,
	 heap,
	 diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space */
         );
  };
  break;

// 5/10/98: Unicode -> SJIS (F)
  case CONV_UNICODE_F_SJIS_F:  // unicode ->  sjis
  case CONV_UNICODE_V_SJIS_F:  // unicode ->  sjis
  {
    return 
    unicodeToMByteTarget(
	 unicodeToSjis,
	 source,
	 sourceLen,
	 target,
	 targetLen,
	 targetPrecision,
	 targetScale,
	 0, 0, 
	 heap,
	 diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE, 
         TRUE /* pad space*/);
  };
  break;

//UR2. Revisit in CharSet project. This case may not be valid anymore.
  case CONV_UNICODE_F_MBYTE_LOCALE_F: // unicode -> multi-byte locale
  case CONV_UNICODE_V_MBYTE_LOCALE_F: // unicode -> multi-byte locale
  {
    if (targetScale == (Lng32) SQLCHARSETCODE_UTF8 ||
        targetScale == (Lng32) SQLCHARSETCODE_SJIS)
    {
      return
      unicodeToMByteTarget(
         (targetScale == (Lng32) SQLCHARSETCODE_UTF8) ? unicodeToUtf8 : unicodeToSjis,
         source,
         sourceLen,
         target,
         targetLen,
         targetPrecision,
         targetScale,
         varCharLen,
         varCharLenSize,
         heap,
         diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space */);
    }
    else
    return
    unicodeToMByteTarget(
	 unicodeToISO88591,
	 source,
	 sourceLen,
	 target,
	 targetLen,
	 targetPrecision,
	 targetScale,
	 varCharLen,
	 varCharLenSize,
	 heap,
	 diagsArea,
         dataConversionErrorFlag,
         flags & CONV_ALLOW_INVALID_CODE_VALUE,
         TRUE /* pad space */);
  };
  break;

  case CONV_ANSI_V_UNICODE_TO_UNICODE_V:   // ANSI VARNCHAR -> unicode (V)
   {

    NAWchar* w_source = (NAWchar*)source;
    Lng32 w_sourceLen = sourceLen/BYTES_PER_NAWCHAR;

    Lng32 i = 0;
    while ((i < w_sourceLen) && (w_source[i] != 0))
      i++;

    if (i == w_sourceLen) {
      ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
      return ex_expr::EXPR_ERROR;
    };

    sourceLen = i*BYTES_PER_NAWCHAR;

    return
    convDoIt(source,
 	sourceLen,
 	sourceType,
 	sourcePrecision,
 	sourceScale,
 	target,
 	targetLen,
 	targetType,
 	targetPrecision,
 	targetScale,
 	varCharLen,
 	varCharLenSize,
 	heap,
 	diagsArea,
 	CONV_UNICODE_V_V,  // unicode (V) -> unicode (V)
 	dataConversionErrorFlag,
        tempFlags);
  };
  break;
    
  case CONV_UNICODE_F_V:   // unicode (F) -> unicode (V)
  case CONV_UNICODE_V_V:   // unicode (V) -> unicode (V)
  {
    Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);

    str_cpy_all(target, source, copyLen);

//      There is no need to change the char string storage format
//      for Unicode string. 
    setVCLength(varCharLen, varCharLenSize, copyLen);

    if (targetLen < sourceLen) 
      {
      NAWchar* first_nonblank = wc_str_find_first_nonblank(
	(NAWchar*)(&source[targetLen]), (sourceLen - targetLen) >> 1);
      
      if (first_nonblank)  // if truncated portion isn't all blanks
        {
        if (dataConversionErrorFlag) // want conversion flag instead of warning?
          {
          // yes - determine whether target is greater than or less than source
          if (*first_nonblank < unicode_char_set::space_char() )  
                            // note assumption: UNICODE character set
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
          else
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
          }
        else
          // no - raise a warning
          ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
        }
      }
  };
  break;

// 6/26/98: ANSI VARNCHAR support
  case CONV_UNICODE_TO_ANSI_V_UNICODE:        // unicode -> ANSI VARNCHAR 
  case CONV_ANSI_V_UNICODE_TO_ANSI_V_UNICODE: // ANSI VARNCHAR-> ANSI VARNCHAR 
  {
     if ( index == CONV_ANSI_V_UNICODE_TO_ANSI_V_UNICODE ) {
        NAWchar* w_source = (NAWchar*)source;
        Lng32 w_sourceLen = sourceLen/BYTES_PER_NAWCHAR;

        Lng32 i = 0;
        while ((i < w_sourceLen) && (w_source[i] != 0))
          i++;
	
        if (i == w_sourceLen) {
          ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
          return ex_expr::EXPR_ERROR;
        };

        sourceLen = BYTES_PER_NAWCHAR*i;
     }
       
     Lng32 localVarCharLen = 0;

     ex_expr::exp_return_type ok
      = convDoIt(source,
         sourceLen,
         sourceType,
         sourcePrecision,
         sourceScale,
         target,
         targetLen-2, // exclude the null terminator (two bytes)
         targetType,
         targetPrecision,
         targetScale,
         (char*)&localVarCharLen,      
         sizeof(localVarCharLen),    
         heap,
         diagsArea,
         CONV_UNICODE_V_V,  // unicode (V) -> unicode (V)
         dataConversionErrorFlag,
         tempFlags);

     if ( ok == ex_expr::EXPR_OK )
        ((NAWchar*)target)[localVarCharLen/BYTES_PER_NAWCHAR] = 0;

     return ok;
  };
  break;


  case CONV_ANSI_V_TO_ASCII_F: {
    // find out the number of characters in the source string.
    // Source string is terminated by a null character.
    Lng32 i = 0;
    while ((i < sourceLen) && (source[i] != 0))
      i++;
	
    if (i == sourceLen) {
      ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
      return ex_expr::EXPR_ERROR;
    };
    // disregard the null terminator
    sourceLen = i;
  };
  // fall thru
  case CONV_ASCII_F_F:
  case CONV_ASCII_V_F:
    {
      // check for needed character conversions or validations
      if (requiresNoConvOrVal(sourceLen, sourcePrecision, sourceScale,
                              targetLen, targetPrecision, targetScale, index))
        {
          Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);

          // this case can often be translated into PCODE
          if (targetLen > copyLen) 
            {
              if (leftPad)
                {
                  str_pad(target, targetLen - copyLen, ' ');
                  str_cpy_all(&target[targetLen - copyLen], source, copyLen);
                }
              else
                {
                  str_cpy_all(target, source, copyLen);
                  /* blank pad target */
                  str_pad(&target[copyLen], targetLen - copyLen, ' ');
                }
            }
          else  // targetLen <= copyLen
            {
              str_cpy_all(target, source, copyLen);
              if (copyLen < sourceLen) 
                {
                  char * first_nonblank = str_find_first_nonpad(
                       &source[copyLen], sourceLen - copyLen, ' ');
                  
                  if (first_nonblank)  // if truncated portion isn't all blanks
                    {
                      if (dataConversionErrorFlag) // want conversion flag instead of warning?
                        {
                          // yes - determine whether target is greater than or less than source
                          if (*(unsigned char *)first_nonblank < ' ')  // note assumption: charset uses ASCII blank
                            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
                          else
                            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
                        }
                      else
                        // no - raise a warning
                        ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
                    }
                }
            }
        }
      else
        {
          // this case isn't translated into PCODE at this time
          if (convCharToChar(source,
                             sourceLen,
                             sourceType,
                             sourcePrecision,
                             sourceScale,
                             target,
                             targetLen,
                             targetType,
                             targetPrecision,
                             targetScale,
                             heap,
                             diagsArea,
                             dataConversionErrorFlag,
                             NULL,
                             TRUE,
                             TRUE,
                             flags & CONV_ALLOW_INVALID_CODE_VALUE)
              != ex_expr::EXPR_OK)
            return ex_expr::EXPR_ERROR;
        }
    }
    break;

  case CONV_ANSI_V_UNICODE_TO_UNICODE_F:
   {
   // calcualte the sourceLen by searching for the NULL
    NAWchar* w_source = (NAWchar*)source;
    Lng32 w_sourceLen = sourceLen/BYTES_PER_NAWCHAR;

    Lng32 i = 0;
    while ((i < w_sourceLen) && (w_source[i] != 0))
      i++;

    if (i == w_sourceLen) {
      ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
      return ex_expr::EXPR_ERROR;
    };
    sourceLen = BYTES_PER_NAWCHAR*i;
   }
   // fall through

// 12/8/97: added for Unicode
  case CONV_UNICODE_F_F:
  case CONV_UNICODE_V_F: 
    {

    if (targetLen > sourceLen) 
      {
      str_cpy_all(target, source, sourceLen);
      /* blank pad target */
      wc_str_pad((NAWchar*)(&target[sourceLen]), (targetLen - sourceLen) >> 1);
      }
    else 
      {
      str_cpy_all(target, source, targetLen);
      if (targetLen < sourceLen) 
        {
        NAWchar * first_nonblank = wc_str_find_first_nonblank(
	  (NAWchar*)(&source[targetLen]), (sourceLen - targetLen) >> 1);
      
        if (first_nonblank)  // if truncated portion isn't all blanks
          {
          if (dataConversionErrorFlag) // want conversion flag instead of warning?
            {
            // yes - determine whether target is greater than or less than source
            // note assumption: UNICODE character set
            if (*first_nonblank < unicode_char_set::space_char())  
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_UP;
            else
              *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
            }
          else
            // no - raise a warning
	    ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
          }
        }
      };
  };
  break;

  case CONV_ASCII_TO_ANSI_V: {

    // check for needed character conversions or validations
    if (requiresNoConvOrVal(sourceLen, sourcePrecision, sourceScale,
                            targetLen, targetPrecision, targetScale, index))
      {
        // max target length includes one byte (the end byte) for null
        // terminator.
        targetLen--;

        if (targetLen >= sourceLen) {
          str_cpy_all(target, source, sourceLen);

          // put null character at the end
          target[sourceLen] = 0;
        }
        else {
          str_cpy_all(target, source, targetLen);
          // put null character at the end
          target[targetLen] = 0;
          if ((targetLen < sourceLen) &&
              str_find_first_nonpad(&source[targetLen], sourceLen - targetLen, ' '))
            ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
        }
      }
    else
      {
        Lng32 convertedDataLen;

        if (convCharToChar(source,
                           sourceLen,
                           sourceType,
                           sourcePrecision,
                           sourceScale,
                           target,
                           targetLen,
                           targetType,
                           targetPrecision,
                           targetScale,
                           heap,
                           diagsArea,
                           dataConversionErrorFlag,
                           &convertedDataLen,
                           FALSE,
                           TRUE,
                           flags & CONV_ALLOW_INVALID_CODE_VALUE) 
            != ex_expr::EXPR_OK)
          return ex_expr::EXPR_ERROR;
        // put null character at the end
        target[convertedDataLen] = 0;
      }
  };
  break;

  case CONV_ANSI_V_TO_ANSI_V:
    // max source length includes one byte (the end byte) for null
    // terminator.
    // max target length includes one byte (the end byte) for null
    // terminator.
    targetLen--;

    // fall through to next 

  case CONV_ANSI_V_TO_ASCII_V: {
    // max source length includes one byte (the end byte) for null
    // terminator.

    // find out the number of characters in the source string.
    // Source string is terminated by a null character.
    Lng32 actSourceLen = 0;
    while ((actSourceLen < sourceLen) && (source[actSourceLen] != 0))
      actSourceLen++;
	
    if (actSourceLen == sourceLen) {
      ExRaiseSqlError(heap, diagsArea, EXE_MISSING_NULL_TERMINATOR);
      return ex_expr::EXPR_ERROR;
    };

    // check for needed character conversions or validations
    if (requiresNoConvOrVal(actSourceLen, sourcePrecision, sourceScale,
                            targetLen,    targetPrecision, targetScale, index))
      {
        if (targetLen >= actSourceLen) {
          str_cpy_all(target, source, actSourceLen);
          if (index == CONV_ANSI_V_TO_ASCII_V) {
            setVCLength(varCharLen, varCharLenSize, actSourceLen);
          }
          else {
            target[actSourceLen] = 0;
          }
         setVCLength(varCharLen, varCharLenSize, actSourceLen);
        }
        else {
          str_cpy_all(target, source, targetLen);
          
          if (index == CONV_ANSI_V_TO_ASCII_V) {
            setVCLength(varCharLen, varCharLenSize, targetLen);
          }
          else {
            target[targetLen] = 0;
          }
          if (str_find_first_nonpad(&source[targetLen], actSourceLen - targetLen, ' '))
            ExRaiseSqlWarning(heap, diagsArea, EXE_STRING_OVERFLOW);
        }
      }
    else
      {
        Lng32 convertedDataLen;

        if (convCharToChar(source,
                           actSourceLen,
                           sourceType,
                           sourcePrecision,
                           sourceScale,
                           target,
                           targetLen,
                           targetType,
                           targetPrecision,
                           targetScale,
                           heap,
                           diagsArea,
                           dataConversionErrorFlag,
                           &convertedDataLen,
                           FALSE,
                           TRUE,
                           flags & CONV_ALLOW_INVALID_CODE_VALUE)
            != ex_expr::EXPR_OK)
          return ex_expr::EXPR_ERROR;
        if (index == CONV_ANSI_V_TO_ASCII_V) {
          setVCLength(varCharLen, varCharLenSize, convertedDataLen);
        }
        else {
          target[convertedDataLen] = 0;
        }
      }
  };
  break;

  case CONV_BIN64S_DATETIME:
    { 
      NABoolean LastDayFlag = FALSE;
      // numeric to date conversion uses the formula:
      // dt = (year - 1900) * 10000 + month * 100 + day
      Int64 nVal = *(Int64*)source;
      Int64 year  = (nVal / 10000);
      Int64 month = (nVal - (year * 10000)) / 100;
      Int64 day   = (nVal - (year * 10000) - (month * 100));
      year = year + 1900;
      
      if ((year > SHRT_MAX) ||
	  (month > CHAR_MAX) ||
	  (day > CHAR_MAX))
	{
	  ExRaiseSqlError(heap, diagsArea, EXE_DATETIME_FIELD_OVERFLOW);
	  return ex_expr::EXPR_ERROR;
	}

      // date is of the form:  YYMD 
      *(short*)target = (short)year;
      target[2] = (char)month;
      target[3] = (char)day;

      // validate the date
      if (ExpDatetime::validateDate(REC_DATE_YEAR, REC_DATE_DAY,
				    target, NULL, FALSE, LastDayFlag) != 0)
	{
	  ExRaiseSqlError(heap, diagsArea, EXE_DATETIME_FIELD_OVERFLOW);
	  return ex_expr::EXPR_ERROR;
	}
    }
  break;

  case CONV_DATETIME_BIN64S:
    {
      // date to numeric conversion uses the formula:
      // numeric = (year - 1900) * 10000 + month * 100 + day
      Int32 year  = *(short*)source;
      Int32 month = source[2];
      Int32 day   = source[3];
      
      *(Int64*)target = (year - 1900)* 10000 + month * 100 + day;
    }
  break;
  
  case CONV_BLOB_BLOB:
    {
        str_cpy_all(target, source, sourceLen);
        setVCLength(varCharLen, varCharLenSize, sourceLen);
    }
    break;
 
  case CONV_BLOB_ASCII_F:
    {
      // conversion from internal format blob handle to external format 
      // should have been done by calling the ExpLOBconvertHandle function.
      // By the time it reaches here, the source is already in the right
      // format, either internal or external. 
      // It can be just copied to the target.
      str_pad(target, targetLen, ' ');
      str_cpy_all(target, source, sourceLen);
    }
    break;

  case CONV_BOOL_BOOL:
    {
      if ((*(Int8*)source == 1) ||
          (*(Int8*)source == 0))
        *(Int8*)target = *(Int8*)source;
      else
        {
          char tempBuf[10];
          str_itoa(*(Int8*)source, tempBuf);
          ExRaiseSqlError(heap, diagsArea, EXE_INVALID_BOOLEAN_VALUE,
                          NULL, NULL, NULL, NULL,
                          tempBuf);
          return ex_expr::EXPR_ERROR;
        }
    }
    break;

  case CONV_BOOL_ASCII:
    {
      char boolbuf[10];
      if (*(Int8*)source == 1)
        strcpy(boolbuf, "TRUE");
      else if (*(Int8*)source == 0)
        strcpy(boolbuf, "FALSE");
      else
        {
          char tempBuf[10];
          str_itoa(*(Int8*)source, tempBuf);
          ExRaiseSqlError(heap, diagsArea, EXE_INVALID_BOOLEAN_VALUE,
                          NULL, NULL, NULL, NULL,
                          tempBuf);
          return ex_expr::EXPR_ERROR;
        }

      // this case isn't translated into PCODE at this time
      Lng32 convertedDataLen;
      
      if (convCharToChar(boolbuf, strlen(boolbuf), REC_BYTE_F_ASCII, 
                         0, SQLCHARSETCODE_ISO88591,
                         target,
                         targetLen,
                         targetType,
                         targetPrecision,
                         targetScale,
                         heap,
                         diagsArea,
                         NULL,
                         &convertedDataLen,
                         ((varCharLenSize > 0) ? FALSE : TRUE),
                         TRUE,
                         FALSE)
          != ex_expr::EXPR_OK)
        return ex_expr::EXPR_ERROR;
      if (varCharLenSize > 0)
        setVCLength(varCharLen, varCharLenSize, convertedDataLen);
    }
    break;

  case CONV_ASCII_BOOL:
    {
      char srcTempBuf[sourceLen+1];
      str_cpy_convert(srcTempBuf, source, sourceLen, 1);
      srcTempBuf[sourceLen] = 0;
      Lng32 tempLen;
      char * srcTempPtr = srcTempBuf;
      srcTempPtr = str_strip_blanks(srcTempBuf, tempLen, TRUE, TRUE);

      if ((strcmp(srcTempPtr, "TRUE") == 0) ||
          (strcmp(srcTempPtr, "1") == 0))
        *(Int8*)target = 1;
      else if ((strcmp(srcTempPtr, "FALSE") == 0) ||
               (strcmp(srcTempPtr, "0") == 0))
        *(Int8*)target = 0;
      else
        {
          char srcErrBuf[sourceLen + 1 + 2/*for quotes*/];
          strcpy(srcErrBuf, "'");
          str_cpy_all(&srcErrBuf[1], source, sourceLen);
          srcErrBuf[1+sourceLen]=0;
          strcat(srcErrBuf, "'");
          ExRaiseSqlError(heap, diagsArea, EXE_INVALID_BOOLEAN_VALUE,
                          NULL, NULL, NULL, NULL,
                          srcErrBuf);
          return ex_expr::EXPR_ERROR;
        }
    }
    break;

  case CONV_BINARY_TO_BINARY:
  case CONV_VARBINARY_TO_BINARY:
    {
      Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
      str_cpy_all(target, source, copyLen);
      
      if (targetLen > copyLen) 
        {
          /* zero pad target */
          str_pad(&target[copyLen], targetLen - copyLen, '\0');
        }
      else if (copyLen < sourceLen) 
        {
          char * first_nonzero = str_find_first_nonpad(
               &source[copyLen], sourceLen - copyLen, '\0');
          if (first_nonzero)
            {
              if (dataConversionErrorFlag) // want conversion flag instead of warning?
                *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
              else
                // no - raise a warning
                ExRaiseDetailSqlError(heap, diagsArea, (ExeErrorCode)(-EXE_CONVERSION_ERROR),
                                      source, sourceLen, sourceType, sourceScale,
                                      targetType, 0, targetLen, targetScale, 
                                      targetPrecision, sourcePrecision);
            }
        }
    }
    break;

  case CONV_BINARY_TO_VARBINARY:
  case CONV_VARBINARY_TO_VARBINARY:
    {
      Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
      str_cpy_all(target, source, copyLen);
      setVCLength(varCharLen, varCharLenSize, copyLen);

      if (copyLen < sourceLen) 
        {
          char * first_nonzero = str_find_first_nonpad(
               &source[copyLen], sourceLen - copyLen, '\0');
          if (first_nonzero)
            {
              if (dataConversionErrorFlag)
                *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
              else
                // no - raise a warning
                ExRaiseDetailSqlError(heap, diagsArea, (ExeErrorCode)(-EXE_CONVERSION_ERROR),
                                      source, sourceLen, sourceType, sourceScale,
                                      targetType, 0, targetLen, targetScale, 
                                      targetPrecision, sourcePrecision);
            }
        }
    }
    break;

  case CONV_OTHER_TO_BINARY:
    {
      Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
      str_cpy_all(target, source, copyLen);
      
      if (targetLen > copyLen) 
        {
          /* zero pad target */
          str_pad(&target[copyLen], targetLen - copyLen, '\0');
        }
      else if (copyLen < sourceLen) 
        {
          if (dataConversionErrorFlag)
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_CONVERSION_ERROR,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, 0, targetLen, targetScale, 
                                    targetPrecision, sourcePrecision);
              return ex_expr::EXPR_ERROR;
            }
        }
    }
    break;

  case CONV_OTHER_TO_VARBINARY:
    {
      Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
      str_cpy_all(target, source, copyLen);
      setVCLength(varCharLen, varCharLenSize, copyLen);

      if (copyLen < sourceLen)
        {
          if (dataConversionErrorFlag)
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_CONVERSION_ERROR,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, 0, targetLen, targetScale, 
                                    targetPrecision, sourcePrecision);
              return ex_expr::EXPR_ERROR;
            }
        }
    }
    break;

  case CONV_BINARY_TO_OTHER:
  case CONV_VARBINARY_TO_OTHER:
    {
      Lng32 copyLen = ((targetLen >= sourceLen) ? sourceLen : targetLen);
      str_cpy_all(target, source, copyLen);

      if (varCharLen && (varCharLenSize > 0))
        setVCLength(varCharLen, varCharLenSize, copyLen);

      // if source len is > target len, return error. There is no truncation.
      if (sourceLen > targetLen)
        {
          if (dataConversionErrorFlag)
            *dataConversionErrorFlag = ex_conv_clause::CONV_RESULT_ROUNDED_DOWN;
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_CONVERSION_ERROR,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, 0, targetLen, targetScale, 
                                    targetPrecision, sourcePrecision);
              return ex_expr::EXPR_ERROR;
            }
        }
      // if target len > source len and target datatype is string, blankpad.
      // Otherwise return error.
      else if (targetLen > sourceLen)
        {
          if (DFS2REC::isCharacterString(targetType))
            {
              char padChar = 0;
              if (DFS2REC::isCharacterString(targetType))
                padChar = ' ';
              
              str_pad(target+sourceLen, targetLen-sourceLen, padChar);
            }
          else
            {
              ExRaiseDetailSqlError(heap, diagsArea, EXE_CONVERSION_ERROR,
                                    source, sourceLen, sourceType, sourceScale,
                                    targetType, 0, targetLen, targetScale, 
                                    targetPrecision, sourcePrecision);
              return ex_expr::EXPR_ERROR;
            }
        }
    }
    break;

  case CONV_NOT_SUPPORTED:
  default:
    {
    ExRaiseDetailSqlError(heap, diagsArea, EXE_CONVERT_NOT_SUPPORTED,
                          source,
                          sourceLen,
                          sourceType,
                          sourceScale,
                          targetType,
                          flags,
                          targetLen,
                          targetScale);
    
    // this conversion is not supported.
    return ex_expr::EXPR_ERROR;
    }
  break;

  };
  return ex_expr::EXPR_OK;
}
      
ex_expr::exp_return_type ex_conv_clause::eval(char *op_data[],
					      CollHeap *heap,
					      ComDiagsArea** diagsArea) {
  Attributes * tgt = getOperand(0);
  Attributes * src = getOperand(1);
  ex_expr::exp_return_type retcode = ex_expr::EXPR_OK;  
  Lng32 warningMark = 0;
 
  if (lastVOAoffset_ > 0)
  {// case of cif bulk move

    char * srcData = op_data[1];
    char * tgtData = op_data[0];

    UInt32 copyLength = 0;


    if (*(Int32*)srcData ==-1 )  //if aliggned format header is 0xFFFFFFFF
    {// case of null instantiated row
      assert(*(Int16*)&srcData[lastVOAoffset_] ==-1);
      copyLength = ((SimpleType*)src)->getLength();
    }
    else
    {
      copyLength = ExpTupleDesc::getVarOffset( srcData,
                                           UINT_MAX, //offset
                                           lastVOAoffset_,         // voaEntryOffset
                                           lastVcIndicatorLength_,
                                           lastNullIndicatorLength_);
      copyLength += ExpTupleDesc::getVarLength( srcData + copyLength,
                                                lastVcIndicatorLength_ );
      copyLength += lastVcIndicatorLength_;

    }
    assert(copyLength > 0 && copyLength <=(UInt32)((SimpleType*)src)->getLength());


#if defined(_DEBUG)
    char * envCifLoggingLocation= getenv("CIF_BM_LOG_LOC");
    //
    if (envCifLoggingLocation)
    {
      char file2 [255];
      snprintf(file2,255,"%s/bm_logging.log", envCifLoggingLocation);
      FILE * p2 = NULL;
      p2 =fopen(file2, "a");
      if (p2== NULL)
      {
        printf("Error in opening file %s\n", file2);
      }
      if (copyLength <=0 || copyLength >= (UInt32)((SimpleType*)src)->getLength())
      {
        fprintf(p2,"%s%d\t%s%d\n","copylength:",copyLength,"maxLength:",((SimpleType*)src)->getLength());
      }

      fclose(p2);
    }
#endif

    UInt32 newLen = copyLength;
    
    str_cpy_all(tgtData,srcData,copyLength);

    if ( alignment_ > 0 )
      {
	newLen = ExpAlignedFormat::adjustDataLength(tgtData, copyLength, alignment_, FALSE) ;
      }
    computedLength_ = newLen;

    return ex_expr::EXPR_OK;
  }

  if (getCheckTruncationFlag() || getNoTruncationWarningsFlag())    
    if (*diagsArea)
      warningMark= (*diagsArea)->getNumber(DgSqlCode::WARNING_);
    else
      warningMark = 0;

  switch (getInstruction()) {


  case CONV_COMPLEX_TO_COMPLEX: {
    if (((ComplexType *)tgt)->conv(src, op_data) != 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, this,
                            op_data);
      return ex_expr::EXPR_ERROR; 
    }
  };
  break;

  case CONV_SIMPLE_TO_COMPLEX: {
    if (((ComplexType *)tgt)->castFrom(src, op_data, heap, diagsArea) != 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, this,
                            op_data);
      return ex_expr::EXPR_ERROR; 
    }
  };
  break;
      
  case CONV_COMPLEX_TO_SIMPLE: {
    if (((ComplexType *)src)->castTo(tgt, op_data, heap, diagsArea) != 0) {
      ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW, this,
                            op_data);
      return ex_expr::EXPR_ERROR;
    }
  };
  break;

  default: {
    Lng32 * dataConversionErrorFlag = 0;
    if (getNumOperands() == 3)
      {
        dataConversionErrorFlag = (Lng32 *)op_data[2];
      }

    ULng32 convFlags = 0;
    if (treatAllSpacesAsZero())
      convFlags |= CONV_TREAT_ALL_SPACES_AS_ZERO;

    if (allowSignInInterval())  
      convFlags |= CONV_ALLOW_SIGN_IN_INTERVAL;

    if (noDatetimeValidation())  
      convFlags |= CONV_NO_DATETIME_VALIDATION;

    char * source = op_data[1];
    if (srcIsVarcharPtr())
      {
	Int64 ptrVal = *(Int64*)op_data[1];
	source = (char*)ptrVal;
      }

    retcode =  convDoIt(source,
			src->getLength(op_data[-MAX_OPERANDS + 1]),
			src->getDatatype(),
			src->getPrecision(),
			src->getScale(),
			op_data[0],
			tgt->getLength(),
			tgt->getDatatype(),
			tgt->getPrecision(),
			tgt->getScale(),
			op_data[-MAX_OPERANDS],
			tgt->getVCIndicatorLength(),
			heap,
			diagsArea,
			getInstruction(),
			dataConversionErrorFlag,
			convFlags
                        );

    if ((flags_ & REVERSE_DATA_ERROR_CONVERSION_FLAG) != 0)
      {
        if (dataConversionErrorFlag && (*dataConversionErrorFlag >= -2 && *dataConversionErrorFlag <= 2))
          {
            *dataConversionErrorFlag = -(*dataConversionErrorFlag);
          }
      }

    if( retcode != ex_expr::EXPR_OK && ( flags_ & CONV_TO_NULL_WHEN_ERROR ) != 0)
    {
      //move null to target
      if(tgt->getNullFlag())
      {
        // clear diags area since this error is not being returned
        if (diagsArea && *diagsArea && ((*diagsArea)->getNumber(DgSqlCode::ERROR_) > 0))
          {
            (*diagsArea)->clear();
          }

        ExpTupleDesc::setNullValue( op_data[-2*MAX_OPERANDS],
                                    tgt->getNullBitIndex(),
                                    tgt->getTupleFormat() );
        retcode = ex_expr::EXPR_OK;
      }
    } 
  };
  }; // switch

  // If this conv clause came from either an update or an insert, and if
  // the data types are char types and the target size is smaller than source
  // size, the checkTruncError flag should be set.
  // In this section, if the flag is set, and a warning is returned as the
  // result of the conversion, an error should be issued instead of a warning.
  // This is according to ANSI SQL92
  
  if (getCheckTruncationFlag() && *diagsArea) {
    Int32 warningMark2 = (*diagsArea)->getNumber(DgSqlCode::WARNING_);
    Int32 counter = warningMark2 - warningMark;
    while (counter) {
      if (((*diagsArea)->getWarningEntry(warningMark2 - counter + 1))->
          getSQLCODE() == EXE_STRING_OVERFLOW) {
	(*diagsArea)->deleteWarning(warningMark2-counter);
        ExRaiseDetailSqlError(heap, diagsArea, EXE_STRING_OVERFLOW,
                              op_data[1],
                              src->getLength(op_data[-MAX_OPERANDS + 1]),
                              src->getDatatype(),
                              src->getScale(),
                              tgt->getDatatype(),
                              0,
                              tgt->getLength(),
                              tgt->getScale(),
                              tgt->getPrecision(),
                              src->getPrecision());
        retcode = ex_expr::EXPR_ERROR;
      }
      else if (((*diagsArea)->getWarningEntry(warningMark2 - counter + 1))->
                getSQLCODE() == EXE_NUMERIC_OVERFLOW) {
             (*diagsArea)->deleteWarning(warningMark2-counter);
             ExRaiseDetailSqlError(heap, diagsArea, EXE_NUMERIC_OVERFLOW,
                                   op_data[1],
                                   src->getLength(op_data[-MAX_OPERANDS + 1]),
                                   src->getDatatype(),
                                   src->getScale(),
                                   tgt->getDatatype(),
                                   0,
                                   tgt->getLength(),
                                   tgt->getScale(),
                                   tgt->getPrecision(),
                                   src->getPrecision());
             retcode = ex_expr::EXPR_ERROR;
           }
      counter--;
    }
  }
  
  if (getNoTruncationWarningsFlag() && *diagsArea) {
    Int32 warningMark2 = (*diagsArea)->getNumber(DgSqlCode::WARNING_);
    Int32 counter = warningMark2 - warningMark;
    while (counter) {
      if (((*diagsArea)->getWarningEntry(warningMark2 - counter + 1))->
		getSQLCODE() == EXE_STRING_OVERFLOW) {
	(*diagsArea)->deleteWarning(warningMark2-counter);
      }
      else if (((*diagsArea)->getWarningEntry(warningMark2 - counter + 1))->
                getSQLCODE() == EXE_NUMERIC_OVERFLOW) {
             (*diagsArea)->deleteWarning(warningMark2-counter);
           }
      counter--;
    }
  }

  return retcode;
};
      

ex_expr::exp_return_type ex_conv_clause::processNulls(char *op_data[],
						      CollHeap *heap,
						      ComDiagsArea **diagsArea)
{
  Attributes *tgtAttr = getOperand(0);

  if (getOperand(1)->getNullFlag() &&          // if input operand is nullable
      (!op_data[1]))                           // and it is null
    {
      if (tgtAttr->getNullFlag())              // if result is nullable
        {
          // move null value to result
          char *rslt = op_data[0];

          // For a null value, DP2 expects the rest of the field to be 0,
          // for SQL/MP tables, but we can do it for all.
          if (tgtAttr->getTupleFormat() == ExpTupleDesc::SQLMX_ALIGNED_FORMAT)
          {
            // For aligned format the null and variable length and value
            // are not in contiguous memory, thus zero out the variable
            // length (if variable field) and value memory separately.
            rslt = ( (tgtAttr->getVCIndicatorLength() > 0)
                     ? op_data[ ex_clause::MAX_OPERANDS ]
                     : op_data[ 2 * ex_clause::MAX_OPERANDS ] );
          }

          str_pad(rslt,
                  tgtAttr->getLength() + 
                  tgtAttr->getNullIndicatorLength() +
                  tgtAttr->getVCIndicatorLength(), 
                  '\0');

          ExpTupleDesc::setNullValue(op_data[0],
                                     tgtAttr->getNullBitIndex(),
                                     tgtAttr->getTupleFormat());
        }
      else // result is not nullable	      
        {
          // Attempt to put NULL into column with 
          // NOT NULL NONDROPPABLE constraint.
          if (getNumOperands() != 3)
            {
              ExRaiseSqlError(heap, diagsArea, EXE_ASSIGNING_NULL_TO_NOT_NULL);
              return ex_expr::EXPR_ERROR;
            }
          else // data conversion error flag is present
            { // begin fix to CR 10-040430-8520: regress/core/test005 fails in MP
              // after a query caching fix changed NumericType::errorsCanOccur()
              // to return true if an underflow/overflow can occur when doing a
              // cast or a narrow from, say, an IEEE float to a Tandem REAL type.
              // In the CR, "select * from t where e is null" is forced via CQS
              // to use an index for e. t is an MP table. e is type Tandem REAL.
              // The errorsCanOccur() fix causes ExpGenerator::generateKeyCast()
              // to generate a "narrow ieee null constant to Tandem REAL" instead
              // of "cast ieee null constant to Tandem REAL". At runtime, this
              // method interprets "narrow ieee null constant to Tandem REAL"
              // and incorrectly assumes it found a NULL primary key value (a
              // contradiction). The correct behavior is to declare a conversion
              // failure iff the target is not nullable and the source is null.
              // set it to note that a conversion has failed
              Lng32 *dataConversionErrorFlag = 
                (Lng32 *)op_data[2 * ex_clause::MAX_OPERANDS + 2];
              *dataConversionErrorFlag = CONV_RESULT_FAILED;
              // end fix to CR 10-040430-8520

              // If target is varchar, it's important to clear out the length
              // so that if it gets used (e.g. conversion error is ignored),
              // then a bogus length would not be accessed
              if (tgtAttr->getVCIndicatorLength() > 0) {
                char* rslt = op_data[ ex_clause::MAX_OPERANDS ];
                str_pad(rslt, tgtAttr->getVCIndicatorLength(), '\0');
              }

              // Make sure the data portion of target is cleared so
              // that if it is used for partitioning, all data
              // conversion error rows will be repartitioned to the
              // same partition.  Note that is some cases the
              // dataCoversionErrorFlag is not properly used.
              char* rslt = op_data[2* ex_clause::MAX_OPERANDS ];
              str_pad(rslt, tgtAttr->getLength(), '\0');
            }
        }

      return ex_expr::EXPR_NULL;     // indicate that a null input was processed
    }
  
  // first operand is not null -- set null indicator in result if nullable
  if (tgtAttr->getNullFlag())
  {
    ExpTupleDesc::clearNullValue(op_data[0], 
                                 tgtAttr->getNullBitIndex(),
                                 tgtAttr->getTupleFormat());
  }

  return ex_expr::EXPR_OK;         // indicate input is not null
};


////////////////////////////////////////////////////////////////////////
// up- or downscale an exact numeric.
////////////////////////////////////////////////////////////////////////
ex_expr::exp_return_type scaleDoIt(char *operand,
				   Lng32 operandLen,
			           Lng32 operandType,
				   Lng32 operandCurrScale,
				   Lng32 newScale,
                                   Lng32 typeOfOldScale,
                                   CollHeap * heap) {

  // return if there is no difference in scale or if "newScale"
  // is really a character set, used when the old representation
  // of the value was a character type. Note that in that case,
  // convDoIt has already scaled the value to the correct amount.
  if (operandCurrScale == newScale ||
      DFS2REC::isAnyCharacter(typeOfOldScale))
    return ex_expr::EXPR_OK;
  
  Int64 intermediate = 0;
  double intermediateDouble = 0;
  char* intermediateString = 0; 
  char *decimalString = 0;
  NABoolean negativeNum = FALSE;

  // variable used for float operation. Specified in "pragma refligned..."
  float  *floatOperandPtr;
  double *doubleOperandPtr;


  Int64 limit = 0;
  switch (operandType) {
  case REC_BIN16_SIGNED: {
    intermediate = (Int64) *(short*)operand;
    limit = (Int64)((intermediate > 0) ? (SHRT_MAX/10) : (SHRT_MIN/10));
  }
  break;
  case REC_BIN16_UNSIGNED: {
    intermediate = (Int64) *(unsigned short*)operand;
    limit = (Int64)(USHRT_MAX/10);
  }
  break;
  case REC_BIN32_SIGNED: {
    intermediate = (Int64) *(Int32*)operand;
    limit = (Int64)((intermediate > 0) ? (INT_MAX/10) : (INT_MIN/10));
  }
  break;
  case REC_BIN32_UNSIGNED: {
    intermediate = (Int64) *(UInt32*)operand;
    limit = (Int64)(UINT_MAX/10);
  }
  break;
  case REC_BIN64_SIGNED: {
    intermediate = *(Int64*)operand;
    limit = (Int64)((intermediate > 0) ? (LLONG_MAX/10) : (LLONG_MIN/10));
  }
  break;
  case REC_FLOAT32: {
    floatOperandPtr  = (float *)operand;
    intermediateDouble = *floatOperandPtr; //(double) *(float*)operand;
  }
  break;
  case REC_FLOAT64: {
    doubleOperandPtr = (double *)operand;
    intermediateDouble = *doubleOperandPtr; //*(double*)operand;
  }
  break;
  case REC_DECIMAL_LSE: {
  case REC_DECIMAL_UNSIGNED:
    // Check if the first bit is set
    negativeNum = operand[0] & 0x80;
    if (negativeNum)
      operand[0] &= 0x7F;
    decimalString = operand;
  }
  break;
  case REC_DECIMAL_LS: {
    intermediateString = operand;
  }
  break;           
  case REC_NUM_BIG_SIGNED:
  case REC_NUM_BIG_UNSIGNED: {
    // not yet supported
    return ex_expr::EXPR_ERROR;

    intermediateString = operand;
  }
  break;           
  default:
    return ex_expr::EXPR_ERROR;
  };
  Lng32 scale = operandCurrScale - newScale;

  if (intermediate != 0) {
    // do calculations only, if intermediate is not 0.
    if (scale > 0) {
      // operandCurrScale in greater than newScale, we have to downscale
      // we can stop if intermediate is 0
      while (intermediate && scale--)
	intermediate /= 10;
    }
    else {
      // we have to upscale.
      while(scale++) {
	if (((intermediate < 0) && (intermediate < limit)) ||
	    ((intermediate > 0) && (intermediate > limit))) {
	  // the next multiplication causes an overflow
	  return ex_expr::EXPR_ERROR;
	};
	intermediate *= 10;
      };
    };
  } // intermediate != 0
  else if (intermediateDouble != 0) {
    // downscale from exact to float
    scale = operandCurrScale;

    // Check for overflow. TBD.
    while (scale--) intermediateDouble /= 10;
  }
  else if (intermediateString != 0) {
    if (DFS2REC::isBigNum(operandType))
      {
	
      }
    else
      {
	intermediateString = new (heap) char[operandLen];
	memset(intermediateString, '0', operandLen);
	if (scale > 0) {  //downscale
	  if (scale <= (operandLen - 1))
	    memcpy(&intermediateString[scale + 1],
		   &operand[1], 
		   operandLen - scale - 1);
	  else {
	    NADELETEBASIC(intermediateString, heap);
	    return ex_expr::EXPR_ERROR;
	  }
	}
	if (scale < 0) {   //upscale;
	  scale = -scale;
	  if (scale <= (operandLen - 1)) {
	    char* first_nonzero = 
	      str_find_first_nonzero(&operand[1], scale);
	    if (first_nonzero)
	      {
		NADELETEBASIC(intermediateString, heap);
		return ex_expr::EXPR_ERROR;
	      }
	    str_cpy_all(&intermediateString[1],
			&operand[1+scale],
			operandLen - scale -1);
	  }
	  else {
	    NADELETEBASIC(intermediateString, heap);
	    return ex_expr::EXPR_ERROR;
	  }
	}
      } // decimal
  } // intermediateString != 0
  else
  if (decimalString != 0) {
    decimalString = new (heap) char[operandLen];
    memset(decimalString, '0', operandLen);
    if (scale > 0) {  //downscale
      if (scale <= operandLen)
        str_cpy_all(&decimalString[scale], &operand[0], operandLen - scale);
      else {
        NADELETEBASIC(decimalString, heap);
        return ex_expr::EXPR_ERROR;
      }
    }
    if (scale < 0) {   //upscale;
      scale = -scale;
      if (scale <= operandLen) {
        char* first_nonzero = 
           str_find_first_nonzero(&operand[0], scale);
        if (first_nonzero)
	{
	  NADELETEBASIC(decimalString, heap);
          return ex_expr::EXPR_ERROR;
	}
        str_cpy_all(&decimalString[0], &operand[scale], operandLen - scale);
      }
      else {
	NADELETEBASIC(decimalString, heap);
        return ex_expr::EXPR_ERROR;
      }
    }
  }
  // scaling was sucessful, put result into operand
  switch (operandType) {
  case REC_BIN16_SIGNED: {
    *(short*)operand = (short)intermediate;
  }
  break;
  case REC_BIN16_UNSIGNED: {
    *(unsigned short*)operand = (unsigned short)intermediate;
  }
  break;
  case REC_BIN32_SIGNED: {
    *(Lng32*)operand = (Lng32)intermediate;
  }
  break;
  case REC_BIN32_UNSIGNED: {
    *(ULng32*)operand = (ULng32)intermediate;
  }
  break;
  case REC_BIN64_SIGNED: {
    *(Int64*)operand = intermediate;
  }
  break;
  case REC_FLOAT32: {
    floatOperandPtr  = (float *)operand;
    *floatOperandPtr = (float)intermediateDouble;
  }
  break;
  case REC_FLOAT64: {
    doubleOperandPtr = (double *)operand;
    *doubleOperandPtr = intermediateDouble;
  }
  break;

  case REC_DECIMAL_LS: {
    str_cpy_all(&operand[1], &intermediateString[1], operandLen -1);
    NADELETEBASIC(intermediateString, heap);
    }
    break;
  case REC_DECIMAL_LSE:
  case REC_DECIMAL_UNSIGNED:
    str_cpy_all(operand, decimalString, operandLen);
    NADELETEBASIC(decimalString, heap);
    if (negativeNum)
      operand[0] |= 0x80;
    break;
  };
  return ex_expr::EXPR_OK;

};


ex_expr::exp_return_type swapBytes(Attributes *attr,
                                   void *ptr)
{
  Int16 dataType = attr->getDatatype();
  Int32 storageLength = attr->getStorageLength();
  rec_datetime_field startField;
  rec_datetime_field endField; 
  ExpDatetime *dtAttr;

  if (dataType >= REC_MIN_BINARY_NUMERIC && dataType <= REC_MAX_BINARY_NUMERIC)
  {
     swapBytes(ptr, storageLength);
  }
  else
  if (dataType == REC_FLOAT32 || dataType == REC_FLOAT64)
  {
     swapBytes(ptr, storageLength);
  }
  else
  if (dataType >= REC_MIN_INTERVAL && dataType <= REC_MAX_INTERVAL)
  {
     swapBytes(ptr, storageLength);
  }
  else
  if (dataType == REC_NCHAR_F_UNICODE ||
      dataType == REC_NUM_BIG_UNSIGNED ||
      dataType == REC_NUM_BIG_SIGNED) 
  {
     for (Int32 i = 0; i < storageLength; i=i+2)
     {
        swapBytes((void *)((char *)ptr+i), 2);
     }
  }
  else
  if (dataType == REC_DATETIME)
  {
     dtAttr = (ExpDatetime *)attr;
     // Get the start and end fields for this Datetime type.
     dtAttr->getDatetimeFields(dtAttr->getPrecision(),
                          startField,
                          endField);
     if (startField == REC_DATE_YEAR)
        // swap the year portion in datetime field
        swapBytes(ptr, 2);
     if (endField == REC_DATE_SECOND)
     {
        // Swap the fraction part in the seconds
        if (dtAttr->getScale() > 0) // There is fraction
           swapBytes((char *)ptr+storageLength-4, 4);   
     }

  }
  return ex_expr::EXPR_OK;
}