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Add the journal_mode pragma. This is currently just syntax - it is not

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operational. (CVS 5024)

FossilOrigin-Name: 8eaa0c71023ac428f6f9f8091341584caa773ab9
This commit is contained in:
drh
2008-04-17 17:02:01 +00:00
parent f3a87624a2
commit 3b02013e73
7 changed files with 109 additions and 18 deletions
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57
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 1.174 2008/03/27 22:42:52 drh Exp $
** $Id: pragma.c,v 1.175 2008/04/17 17:02:02 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -424,6 +424,61 @@ void sqlite3Pragma(
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0, zRet, 0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}else
/*
** PRAGMA [database.]journal_mode
** PRAGMA [database.]journal_mode = (delete|persist|off)
*/
if( sqlite3StrICmp(zLeft,"journal_mode")==0 ){
int eMode;
static const char *azModeName[] = {"delete", "persist", "off"};
if( zRight==0 ){
eMode = PAGER_JOURNALMODE_QUERY;
}else{
int n = strlen(zRight);
eMode = 2;
while( eMode>=0 && sqlite3StrNICmp(zRight, azModeName[eMode], n)!=0 ){
eMode--;
}
}
if( pId2->n==0 && eMode==PAGER_JOURNALMODE_QUERY ){
/* Simple "PRAGMA persistent_journal;" statement. This is a query for
** the current default journal mode (which may be different to
** the journal-mode of the main database).
*/
eMode = db->dfltJournalMode;
}else{
Pager *pPager;
if( pId2->n==0 ){
/* This indicates that no database name was specified as part
** of the PRAGMA command. In this case the journal-mode must be
** set on all attached databases, as well as the main db file.
**
** Also, the sqlite3.dfltJournalMode variable is set so that
** any subsequently attached databases also use the specified
** journal mode.
*/
int ii;
assert(pDb==&db->aDb[0]);
for(ii=2; ii<db->nDb; ii++){
pPager = sqlite3BtreePager(db->aDb[ii].pBt);
sqlite3PagerJournalMode(pPager, eMode);
}
db->dfltJournalMode = eMode;
}
pPager = sqlite3BtreePager(pDb->pBt);
eMode = sqlite3PagerJournalMode(pPager, eMode);
}
assert( eMode==PAGER_JOURNALMODE_DELETE
|| eMode==PAGER_JOURNALMODE_PERSIST
|| eMode==PAGER_JOURNALMODE_OFF );
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "journal_mode", P4_STATIC);
sqlite3VdbeAddOp4(v, OP_String8, 0, 1, 0,
azModeName[eMode], P4_STATIC);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 1);
}else
#endif /* SQLITE_OMIT_PAGER_PRAGMAS */
/*