src/interfaces/ecpg/test/compat_oracle/char_array.pgc

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <pgtypes_numeric.h>

EXEC SQL INCLUDE sqlda.h;

EXEC SQL INCLUDE ../regression;

static void warn(void)
{
  fprintf(stderr, "Warning: At least one column was truncated\n");
}

/* Compatible handling of char array to retrieve varchar field to char array
   should be fixed-length, blank-padded, then null-terminated.
   Conforms to the ANSI Fixed Character type. */

int main() {

  EXEC SQL WHENEVER SQLWARNING do warn();
  EXEC SQL WHENEVER SQLERROR STOP;

  const char *ppppp = "XXXXX";
  int loopcount;
  sqlda_t *sqlda = NULL;

  EXEC SQL BEGIN DECLARE SECTION;
  char shortstr[5];
  char bigstr[11];
  short shstr_ind = 0;
  short bigstr_ind = 0;
  EXEC SQL END DECLARE SECTION;

  ECPGdebug(1, stderr);
  EXEC SQL CONNECT TO REGRESSDB1;

  EXEC SQL CREATE TABLE strdbase (strval varchar(10));
  EXEC SQL INSERT INTO strdbase values ('');
  EXEC SQL INSERT INTO strdbase values ('AB');
  EXEC SQL INSERT INTO strdbase values ('ABCD');
  EXEC SQL INSERT INTO strdbase values ('ABCDE');
  EXEC SQL INSERT INTO strdbase values ('ABCDEF');
  EXEC SQL INSERT INTO strdbase values ('ABCDEFGHIJ');

  EXEC SQL declare C cursor for select strval, strval from strdbase;
  EXEC SQL OPEN C;

  EXEC SQL WHENEVER NOT FOUND DO BREAK;

  printf("Full Str.  :  Short  Ind.\n");
  for (loopcount = 0; loopcount < 100; loopcount++) {
    strncpy(shortstr, ppppp, sizeof shortstr);
    memset(bigstr, 0, sizeof bigstr);
    EXEC SQL FETCH C into :bigstr :bigstr_ind, :shortstr :shstr_ind;
    printf("\"%s\": \"%s\"  %d\n", bigstr, shortstr, shstr_ind);
  }

  EXEC SQL CLOSE C;
  EXEC SQL DROP TABLE strdbase;
  EXEC SQL COMMIT WORK;

  /* SQLDA handling */
  EXEC SQL WHENEVER SQLWARNING SQLPRINT;
  EXEC SQL WHENEVER NOT FOUND STOP;
  EXEC SQL PREPARE stmt1 FROM "SELECT 123::numeric(3,0), 't'::varchar(2)";
  EXEC SQL DECLARE cur1 CURSOR FOR stmt1;
  EXEC SQL OPEN cur1;
  EXEC SQL FETCH NEXT FROM cur1 INTO DESCRIPTOR sqlda;

  printf("\n-----------------\ntype    : data\n");
  for (int i = 0 ; i < sqlda->sqld ; i++)
  {
	  sqlvar_t v = sqlda->sqlvar[i];
	  char *sqldata = v.sqldata;

	  if (v.sqltype == ECPGt_numeric)
		  sqldata =
			  PGTYPESnumeric_to_asc((numeric*) sqlda->sqlvar[i].sqldata, -1);

	  printf("%-8s: \"%s\"\n", v.sqlname.data, sqldata);
  }

  EXEC SQL CLOSE cur1;
  EXEC SQL COMMIT WORK;

  printf("\nGOOD-BYE!!\n\n");

  EXEC SQL DISCONNECT ALL;

  return 0;
}