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93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
/* 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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#ifndef NdbCursorOperation_H
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#define NdbCursorOperation_H
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#include <NdbOperation.hpp>
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class NdbResultSet;
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/**
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* @class NdbCursorOperation
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* @brief Operation using cursors
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*/
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class NdbCursorOperation : public NdbOperation
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{
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friend class NdbResultSet;
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friend class NdbConnection;
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public:
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/**
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* Type of cursor
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*/
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enum CursorType {
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NoCursor = 0,
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ScanCursor = 1,
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IndexCursor = 2
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};
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/**
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* Lock when performing scan
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*/
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enum LockMode {
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LM_Read = 0,
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LM_Exclusive = 1,
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LM_CommittedRead = 2,
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#ifndef DOXYGEN_SHOULD_SKIP_INTERNAL
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LM_Dirty = 2
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#endif
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};
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virtual CursorType cursorType() = 0;
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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 ) = 0;
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inline NdbResultSet* readTuplesExclusive(int parallell = 0){
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return readTuples(parallell, LM_Exclusive);
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}
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protected:
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NdbCursorOperation(Ndb* aNdb);
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~NdbCursorOperation();
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void cursInit();
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virtual int executeCursor(int ProcessorId) = 0;
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NdbResultSet* getResultSet();
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NdbResultSet* m_resultSet;
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private:
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virtual int nextResult(bool fetchAllowed) = 0;
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virtual void closeScan() = 0;
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};
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#endif
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