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Initial revision of NDB Cluster files
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248
ndb/include/ndbapi/NdbScanOperation.hpp
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248
ndb/include/ndbapi/NdbScanOperation.hpp
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/* Copyright (C) 2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*****************************************************************************
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* Name: NdbScanOperation.hpp
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* Include:
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* Link:
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* Author: Martin Sk<53>ld
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* Date: 2002-04-01
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* Version: 0.1
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* Description: Table scan support
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* Documentation:
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* Adjust: 2002-04-01 Martin Sk<53>ld First version.
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****************************************************************************/
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#ifndef NdbScanOperation_H
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#define NdbScanOperation_H
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#include <NdbOperation.hpp>
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#include <NdbCursorOperation.hpp>
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/**
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* @class NdbScanOperation
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* @brief Class of scan operations for use in transactions.
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*/
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class NdbScanOperation : public NdbCursorOperation
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{
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friend class Ndb;
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friend class NdbConnection;
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friend class NdbResultSet;
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friend class NdbOperation;
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public:
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/**
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* readTuples returns a NdbResultSet where tuples are stored.
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* Tuples are not stored in NdbResultSet until execute(NoCommit)
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* has been executed and nextResult has been called.
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*
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* @param parallel Scan parallelism
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* @param LockMode Scan lock handling
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* @returns NdbResultSet.
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*/
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virtual NdbResultSet* readTuples(unsigned parallel = 0,
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LockMode = LM_Read );
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#ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
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int updateTuples();
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int updateTuples(Uint32 parallelism);
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int deleteTuples();
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int deleteTuples(Uint32 parallelism);
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// Overload setValue for updateTuples
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int setValue(const char* anAttrName, const char* aValue, Uint32 len = 0);
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int setValue(const char* anAttrName, Int32 aValue);
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int setValue(const char* anAttrName, Uint32 aValue);
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int setValue(const char* anAttrName, Int64 aValue);
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int setValue(const char* anAttrName, Uint64 aValue);
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int setValue(const char* anAttrName, float aValue);
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int setValue(const char* anAttrName, double aValue);
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int setValue(Uint32 anAttrId, const char* aValue, Uint32 len = 0);
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int setValue(Uint32 anAttrId, Int32 aValue);
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int setValue(Uint32 anAttrId, Uint32 aValue);
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int setValue(Uint32 anAttrId, Int64 aValue);
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int setValue(Uint32 anAttrId, Uint64 aValue);
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int setValue(Uint32 anAttrId, float aValue);
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int setValue(Uint32 anAttrId, double aValue);
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#endif
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private:
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NdbScanOperation(Ndb* aNdb);
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~NdbScanOperation();
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NdbCursorOperation::CursorType cursorType();
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virtual int nextResult(bool fetchAllowed = true);
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virtual void release();
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void closeScan();
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// Overloaded methods from NdbCursorOperation
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int executeCursor(int ProcessorId);
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// Overloaded private methods from NdbOperation
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int init(NdbTableImpl* tab, NdbConnection* myConnection);
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int prepareSend(Uint32 TC_ConnectPtr, Uint64 TransactionId);
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int doSend(int ProcessorId);
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virtual void setErrorCode(int aErrorCode);
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virtual void setErrorCodeAbort(int aErrorCode);
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virtual int equal_impl(const NdbColumnImpl* anAttrObject,
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const char* aValue,
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Uint32 len);
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private:
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NdbConnection *m_transConnection;
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bool m_autoExecute;
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bool m_updateOp;
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bool m_writeOp;
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bool m_deleteOp;
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class SetValueRecList* m_setValueList;
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};
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#ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
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class AttrInfo;
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class SetValueRecList;
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class SetValueRec {
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friend class SetValueRecList;
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public:
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SetValueRec();
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~SetValueRec();
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enum SetValueType {
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SET_STRING_ATTR1 = 0,
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SET_INT32_ATTR1 = 1,
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SET_UINT32_ATTR1 = 2,
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SET_INT64_ATTR1 = 3,
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SET_UINT64_ATTR1 = 4,
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SET_FLOAT_ATTR1 = 5,
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SET_DOUBLE_ATTR1 = 6,
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SET_STRING_ATTR2 = 7,
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SET_INT32_ATTR2 = 8,
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SET_UINT32_ATTR2 = 9,
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SET_INT64_ATTR2 = 10,
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SET_UINT64_ATTR2 = 11,
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SET_FLOAT_ATTR2 = 12,
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SET_DOUBLE_ATTR2 = 13
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};
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SetValueType stype;
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union {
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char* anAttrName;
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Uint32 anAttrId;
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};
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typedef struct String {
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char* aStringValue;
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Uint32 len;
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};
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union {
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String stringStruct;
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Int32 anInt32Value;
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Uint32 anUint32Value;
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Int64 anInt64Value;
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Uint64 anUint64Value;
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float aFloatValue;
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double aDoubleValue;
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};
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private:
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SetValueRec* next;
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};
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inline
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SetValueRec::SetValueRec() :
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next(0)
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{
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}
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inline
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SetValueRec::~SetValueRec()
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{
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if ((stype == SET_STRING_ATTR1) ||
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(stype == SET_INT32_ATTR1) ||
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(stype == SET_UINT32_ATTR1) ||
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(stype == SET_INT64_ATTR1) ||
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(stype == SET_UINT64_ATTR1) ||
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(stype == SET_FLOAT_ATTR1) ||
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(stype == SET_DOUBLE_ATTR1))
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free(anAttrName);
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if ((stype == SET_STRING_ATTR1) ||
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(stype == SET_STRING_ATTR2))
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free(stringStruct.aStringValue);
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if (next) delete next;
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next = 0;
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}
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class SetValueRecList {
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public:
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SetValueRecList();
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~SetValueRecList();
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void add(const char* anAttrName, const char* aValue, Uint32 len = 0);
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void add(const char* anAttrName, Int32 aValue);
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void add(const char* anAttrName, Uint32 aValue);
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void add(const char* anAttrName, Int64 aValue);
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void add(const char* anAttrName, Uint64 aValue);
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void add(const char* anAttrName, float aValue);
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void add(const char* anAttrName, double aValue);
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void add(Uint32 anAttrId, const char* aValue, Uint32 len = 0);
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void add(Uint32 anAttrId, Int32 aValue);
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void add(Uint32 anAttrId, Uint32 aValue);
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void add(Uint32 anAttrId, Int64 aValue);
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void add(Uint32 anAttrId, Uint64 aValue);
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void add(Uint32 anAttrId, float aValue);
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void add(Uint32 anAttrId, double aValue);
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typedef void(* IterateFn)(SetValueRec&, NdbOperation&);
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static void callSetValueFn(SetValueRec&, NdbOperation&);
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void iterate(IterateFn nextfn, NdbOperation&);
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private:
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SetValueRec* first;
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SetValueRec* last;
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};
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inline
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SetValueRecList::SetValueRecList() :
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first(0),
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last(0)
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{
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}
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inline
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SetValueRecList::~SetValueRecList() {
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if (first) delete first;
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first = last = 0;
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}
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inline
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void SetValueRecList::iterate(SetValueRecList::IterateFn nextfn, NdbOperation& oper)
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{
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SetValueRec* recPtr = first;
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while(recPtr) {
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(*nextfn)(*recPtr, oper);
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recPtr = recPtr->next; // Move to next in list - MASV
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}
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}
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#endif
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#endif
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