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Reference count Table structures so that they are not deallocated too soon.

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Ticket #1210. (CVS 2498)

FossilOrigin-Name: e73d25c7419d580c47925494621df26d2fb9f27e
This commit is contained in:
drh
2005-06-06 21:19:56 +00:00
parent 473d179d8a
commit ed8a3bb108
9 changed files with 79 additions and 64 deletions
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9
src/expr.c
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@@ -12,7 +12,7 @@
** This file contains routines used for analyzing expressions and
** for generating VDBE code that evaluates expressions in SQLite.
**
** $Id: expr.c,v 1.204 2005/06/06 17:11:46 drh Exp $
** $Id: expr.c,v 1.205 2005/06/06 21:19:57 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -474,14 +474,15 @@ SrcList *sqlite3SrcListDup(SrcList *p){
for(i=0; i<p->nSrc; i++){
struct SrcList_item *pNewItem = &pNew->a[i];
struct SrcList_item *pOldItem = &p->a[i];
Table *pTab;
pNewItem->zDatabase = sqliteStrDup(pOldItem->zDatabase);
pNewItem->zName = sqliteStrDup(pOldItem->zName);
pNewItem->zAlias = sqliteStrDup(pOldItem->zAlias);
pNewItem->jointype = pOldItem->jointype;
pNewItem->iCursor = pOldItem->iCursor;
pNewItem->pTab = pOldItem->pTab;
if( pNewItem->pTab ){
pNewItem->pTab->isTransient = 0;
pTab = pNewItem->pTab = pOldItem->pTab;
if( pTab ){
pTab->nRef++;
}
pNewItem->pSelect = sqlite3SelectDup(pOldItem->pSelect);
pNewItem->pOn = sqlite3ExprDup(pOldItem->pOn);