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Fix a problem with LIMIT and OFFSET clauses on the parent query when optimizing a UNION ALL sub-select. (CVS 5332)

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FossilOrigin-Name: a79786a961dba8f4ffaddbe55e6467c14b12f7d6
This commit is contained in:
danielk1977
2008-07-01 14:39:35 +00:00
parent f23329a221
commit 4b86ef1d87
5 changed files with 32 additions and 14 deletions
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7
src/select.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.441 2008/07/01 14:09:14 danielk1977 Exp $
** $Id: select.c,v 1.442 2008/07/01 14:39:35 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -3191,16 +3191,21 @@ static int flattenSubquery(
for(pSub=pSub->pPrior; pSub; pSub=pSub->pPrior){
Select *pNew;
ExprList *pOrderBy = p->pOrderBy;
Expr *pLimit = p->pLimit;
Expr *pOffset = p->pOffset;
Select *pPrior = p->pPrior;
p->pOrderBy = 0;
p->pSrc = 0;
p->pPrior = 0;
p->pLimit = 0;
pNew = sqlite3SelectDup(db, p);
pNew->pPrior = pPrior;
p->pPrior = pNew;
p->pOrderBy = pOrderBy;
p->op = TK_ALL;
p->pSrc = pSrc;
p->pLimit = pLimit;
p->pOffset = pOffset;
p->pRightmost = 0;
pNew->pRightmost = 0;
}