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Continuing improvements to the multi-index OR-clause optimizer. Added a

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few simple test cases. (CVS 6062)

FossilOrigin-Name: 55d4f493e7df8515574a75caec9967d6c71b6012
This commit is contained in:
drh
2008-12-23 23:56:22 +00:00
parent 67ddef6922
commit 23d04d5a20
8 changed files with 229 additions and 66 deletions
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16
src/delete.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** in order to generate code for DELETE FROM statements.
**
** $Id: delete.c,v 1.190 2008/12/10 21:19:57 drh Exp $
** $Id: delete.c,v 1.191 2008/12/23 23:56:22 drh Exp $
*/
#include "sqliteInt.h"
@@ -392,21 +392,15 @@ void sqlite3DeleteFrom(
int iRowid = ++pParse->nMem; /* Used for storing rowid values. */
int iRowSet = ++pParse->nMem; /* Register for rowset of rows to delete */
/* Begin the database scan
/* Collect rowids of every row to be deleted.
*/
pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0, 0);
sqlite3VdbeAddOp2(v, OP_Null, 0, iRowSet);
pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, 0,
WHERE_FILL_ROWSET, iRowSet);
if( pWInfo==0 ) goto delete_from_cleanup;
/* Remember the rowid of every item to be deleted.
*/
sqlite3VdbeAddOp2(v, IsVirtual(pTab) ? OP_VRowid : OP_Rowid, iCur, iRowid);
sqlite3VdbeAddOp2(v, OP_RowSetAdd, iRowSet, iRowid);
if( db->flags & SQLITE_CountRows ){
sqlite3VdbeAddOp2(v, OP_AddImm, memCnt, 1);
}
/* End the database scan loop.
*/
sqlite3WhereEnd(pWInfo);
/* Open the pseudo-table used to store OLD if there are triggers.