6fcb411fe4
Prepared statements can return multiple result sets since MySQL 5.5. That can happen when calling stored procedures using `CALL x();`. This change removes the previous caching of result bindings, since the number of fields in a result can differ from result set to result set. This could potentially have a negative impact on prepared statements always only returning one result set, since the result binding buffers are recreated everytime the statement is executed instead of once. That difference should be negligible. Fixes #823.
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod MySQL Extension
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* Copyright (C) 2004-2007 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#ifndef _INCLUDE_SM_MYSQL_BOUND_RESULTS_H_
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#define _INCLUDE_SM_MYSQL_BOUND_RESULTS_H_
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#include "MyDatabase.h"
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class MyStatement;
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struct ResultBind
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{
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my_bool my_null;
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unsigned long my_length;
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union
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{
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int ival;
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float fval;
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} data;
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unsigned char *blob;
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size_t length;
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};
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class MyBoundResults :
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public IResultSet,
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public IResultRow
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{
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friend class MyStatement;
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public:
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MyBoundResults(MYSQL_STMT *stmt, MYSQL_RES *res, unsigned int num_fields);
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~MyBoundResults();
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public: //IResultSet
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unsigned int GetRowCount();
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unsigned int GetFieldCount();
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const char *FieldNumToName(unsigned int columnId);
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bool FieldNameToNum(const char *name, unsigned int *columnId);
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bool MoreRows();
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IResultRow *FetchRow();
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bool Rewind();
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DBType GetFieldType(unsigned int field);
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DBType GetFieldDataType(unsigned int field);
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IResultRow *CurrentRow();
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public: //IResultRow
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DBResult GetString(unsigned int id, const char **pString, size_t *length);
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DBResult CopyString(unsigned int id,
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char *buffer,
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size_t maxlength,
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size_t *written);
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DBResult GetFloat(unsigned int id, float *pFloat);
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DBResult GetInt(unsigned int id, int *pInt);
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bool IsNull(unsigned int id);
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size_t GetDataSize(unsigned int id);
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DBResult GetBlob(unsigned int id, const void **pData, size_t *length);
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DBResult CopyBlob(unsigned int id, void *buffer, size_t maxlength, size_t *written);
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public:
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bool Initialize();
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void Update();
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private:
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bool RefetchField(MYSQL_STMT *stmt,
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unsigned int id,
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size_t initSize,
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enum_field_types type);
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private:
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MYSQL_STMT *m_stmt;
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MYSQL_RES *m_pRes;
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MYSQL_BIND *m_bind;
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ResultBind *m_pull;
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unsigned int m_ColCount;
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bool m_Initialized;
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unsigned int m_RowCount;
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unsigned int m_CurRow;
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bool m_bUpdatedBinds;
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};
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#endif //_INCLUDE_SM_MYSQL_BOUND_RESULTS_H_
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