| /********************************************************************** |
| // @@@ 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, |
| // software distributed under the License is distributed on an |
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| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| // |
| // @@@ END COPYRIGHT @@@ |
| **********************************************************************/ |
| /* -*-C++-*- |
| **************************************************************************** |
| * |
| * File: ComTdbPackRows.h |
| * Description: |
| * |
| * Created: 5/6/98 |
| * Language: C++ |
| * |
| * |
| * |
| * |
| **************************************************************************** |
| */ |
| |
| #ifndef COMTDBPACKROWS_H |
| #define COMTDBPACKROWS_H |
| |
| // External forward declarations |
| // |
| #include "ComTdb.h" |
| |
| |
| class ComTdbPackRows: public ComTdb |
| { |
| friend class ExPackRowsTcb; |
| friend class ExPackRowsPrivateState; |
| |
| public: |
| |
| // Default Constructor. |
| NA_EIDPROC |
| ComTdbPackRows(); |
| |
| // Copy constructor. |
| NA_EIDPROC |
| ComTdbPackRows(const ComTdbPackRows* packTdb); |
| |
| // Constructor used by the PhyPack::codeGen() in GenRelMisc.cpp. |
| NA_EIDPROC |
| ComTdbPackRows(ComTdb* childTdb, |
| ex_expr* packExpr, |
| ex_expr* predExpr, |
| const unsigned short packTuppIndex, |
| Lng32 packTuppLen, |
| ex_cri_desc* givenCriDesc, |
| ex_cri_desc* returnedCriDesc, |
| queue_index fromParent, |
| queue_index toParent); |
| |
| |
| // Pack the pack TDB for transmission from one process to another. |
| NA_EIDPROC |
| Long pack(void *); |
| |
| // Unpack the pack TDB after receiving it from another process. |
| NA_EIDPROC |
| Lng32 unpack(void *, void * reallocator); |
| |
| // Don't know what it is for ?? |
| NA_EIDPROC |
| void display() const; |
| |
| // Return a pointer to the child TBD of this Pack TDB. |
| NA_EIDPROC |
| inline ComTdb* getChildTdb() { return childTdb_; } |
| |
| // We are observing order queue protocol. |
| NA_EIDPROC |
| Int32 orderedQueueProtocol() const ; |
| |
| // Return a pointer to the specifed (by position) child TDB. |
| NA_EIDPROC |
| virtual const ComTdb* getChild(Int32 pos) const |
| { |
| if(pos == 0) return childTdb_; |
| return NULL; |
| } |
| |
| // Return the number of children for this node. |
| NA_EIDPROC |
| virtual Int32 numChildren() const { return 1; } |
| |
| // Return the number of expression this node has. |
| NA_EIDPROC |
| virtual Int32 numExpressions() const { return 2; } |
| |
| // Return the expression by position. |
| NA_EIDPROC |
| virtual ex_expr* getExpressionNode(Int32 pos) |
| { |
| switch(pos) |
| { |
| case 0: return packExpr_; |
| case 1: return predExpr_; |
| default: break; |
| } |
| return NULL; |
| } |
| |
| // Return the name of an expression by position. |
| NA_EIDPROC |
| virtual const char* getExpressionName(Int32 pos) const |
| { |
| switch(pos) |
| { |
| case 0: return "packExpr"; |
| case 1: return "predExpr"; |
| default: break; |
| } |
| return NULL; |
| } |
| |
| virtual const char* getNodeName() const { return "EX_PACK"; } |
| |
| protected: |
| |
| // The child of this Pack TDB. |
| ComTdbPtr childTdb_; // 00-07 |
| |
| // The expression to do the real packing. |
| ExExprPtr packExpr_; // 08-15 |
| |
| // The selection predicate. |
| ExExprPtr predExpr_; // 16-23 |
| |
| // The Cri Descriptor given to this node by its parent. |
| ExCriDescPtr givenCriDesc_; // 24-31 |
| |
| // The Cri Descriptor return to the parent node. |
| ExCriDescPtr returnedCriDesc_; // 32-39 |
| |
| // The length of the packed record. |
| Int32 packTuppLen_; // 40-43 |
| |
| // The length of the down queue used to communicate with the parent. |
| UInt32 fromParent_; // 44-47 |
| |
| // The length of the up queue used to communicate with the parent. |
| UInt32 toParent_; // 48-51 |
| |
| // The size of pool buffers to allocate. |
| UInt32 bufferSize_; // 52-55 |
| |
| // The number of buffers to allocate for the pool. |
| UInt16 noOfBuffers_; // 56-57 |
| |
| // The index of the generated tupp in the ATP. |
| UInt16 packTuppIndex_; // 58-59 |
| |
| char fillersComTdbPackRows_[36]; // 60-95 |
| |
| |
| }; |
| |
| #endif |
| |