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Make the auto_vacuum mode peristent in all cases. (CVS 4115)

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FossilOrigin-Name: 5b0408ddd0f1c825f402d0f5a3088a61b5ecd2c3
This commit is contained in:
danielk1977
2007-06-25 08:16:58 +00:00
parent d62e76c792
commit 27b1f95f08
6 changed files with 142 additions and 30 deletions
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34
src/pragma.c
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@@ -11,7 +11,7 @@
*************************************************************************
** This file contains code used to implement the PRAGMA command.
**
** $Id: pragma.c,v 1.140 2007/06/24 08:00:43 danielk1977 Exp $
** $Id: pragma.c,v 1.141 2007/06/25 08:16:58 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -424,6 +424,9 @@ void sqlite3Pragma(
#ifndef SQLITE_OMIT_AUTOVACUUM
if( sqlite3StrICmp(zLeft,"auto_vacuum")==0 ){
Btree *pBt = pDb->pBt;
if( sqlite3ReadSchema(pParse) ){
goto pragma_out;
}
if( !zRight ){
int auto_vacuum =
pBt ? sqlite3BtreeGetAutoVacuum(pBt) : SQLITE_DEFAULT_AUTOVACUUM;
@@ -431,7 +434,34 @@ void sqlite3Pragma(
}else{
int eAuto = getAutoVacuum(zRight);
if( eAuto>=0 ){
sqlite3BtreeSetAutoVacuum(pBt, eAuto);
/* Call SetAutoVacuum() to set initialize the internal auto and
** incr-vacuum flags. This is required in case this connection
** creates the database file. It is important that it is created
** as an auto-vacuum capable db.
*/
int rc = sqlite3BtreeSetAutoVacuum(pBt, eAuto);
if( rc==SQLITE_OK && (eAuto==1 || eAuto==2) ){
/* When setting the auto_vacuum mode to either "full" or
** "incremental", write the value of meta[6] in the database
** file. Before writing to meta[6], check that meta[3] indicates
** that this really is an auto-vacuum capable database.
*/
static const VdbeOpList setMeta6[] = {
{ OP_Transaction, 0, 1, 0}, /* 0 */
{ OP_ReadCookie, 0, 3, 0}, /* 1 */
{ OP_If, 0, 0, 0}, /* 2 */
{ OP_Halt, SQLITE_OK, OE_Abort, 0}, /* 3 */
{ OP_Integer, 0, 0, 0}, /* 4 */
{ OP_SetCookie, 0, 6, 0}, /* 5 */
};
int iAddr;
iAddr = sqlite3VdbeAddOpList(v, ArraySize(setMeta6), setMeta6);
sqlite3VdbeChangeP1(v, iAddr, iDb);
sqlite3VdbeChangeP1(v, iAddr+1, iDb);
sqlite3VdbeChangeP2(v, iAddr+2, iAddr+4);
sqlite3VdbeChangeP1(v, iAddr+4, eAuto-1);
sqlite3VdbeChangeP1(v, iAddr+5, iDb);
}
}
}
}else