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/* Copyright (C) 2009 PrimeBase Technologies GmbH, Germany
*
* PrimeBase Media Stream for MySQL
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Barry Leslie
*
* System variables table.
*
*/
#pragma once
#ifndef __SYSTAB_VARIABLES_H__
#define __SYSTAB_VARIABLES_H__
#include "cslib/CSMutex.h"
#include "defs_ms.h"
#include "system_table_ms.h"
#include "discover_ms.h"
#define RESTORE_DUMP_VAR "Restoring-Dump"
#define BACKUP_NUMBER_VAR "Backup-Number"
#define VARIABLES_TABLE_NAME "pbms_variable"
class MSVariableTable : public MSOpenSystemTable {
public:
MSVariableTable(MSSystemTableShare *share, TABLE *table);
~MSVariableTable();
void use();
void unuse();
void seqScanInit();
bool seqScanNext(char *buf);
int getRefLen() { return sizeof(iVariableIndex);}
void seqScanPos(unsigned char *pos);
void seqScanRead(unsigned char *pos, char *buf);
void updateRow(char *old_data, char *new_data);
static void saveTable(MSDatabase *db);
static void loadTable(MSDatabase *db);
static void transferTable(MSDatabase *from_db, MSDatabase *to_db);
static void setVariable(MSDatabase *db, const char *name, const char *value);
static CSStringBuffer *dumpTable(MSDatabase *db);
static void restoreTable(MSDatabase *db, const char *data, size_t size, bool reload = true);
static void removeTable(CSString *db_path);
static const uint8_t tableID = 0X04; // A unique id for the MSVariableTable dump data
static const uint16_t tableVersion = 0X0001; // The current version of the table
private:
uint32_t iVariableIndex;
static CSLock gVarLock;
};
extern DT_FIELD_INFO pbms_variable_info[];
extern DT_KEY_INFO pbms_variable_keys[];
#endif // __SYSTAB_VARIABLES_H__
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