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Sorting is now done using a sorting index rather than loading the entire

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result set into memory and doing a merge sort.  The old merge sort technique
was a carry-over from SQLite version 1.  The new method uses a bounded amount
of memory and scales to much larger result sets.  There are still errors:
some 39 regression tests fail. (CVS 2653)

FossilOrigin-Name: 09db0a24241f9248584250d1728117b8a3159626
This commit is contained in:
drh
2005-09-01 03:07:44 +00:00
parent dece1a8464
commit 0342b1f542
9 changed files with 192 additions and 338 deletions
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7
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 1.222 2005/08/30 00:54:02 drh Exp $
** $Id: expr.c,v 1.223 2005/09/01 03:07:44 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -546,9 +546,12 @@ Select *sqlite3SelectDup(Select *p){
pNew->pOffset = sqlite3ExprDup(p->pOffset);
pNew->iLimit = -1;
pNew->iOffset = -1;
pNew->ppOpenVirtual = 0;
pNew->isResolved = p->isResolved;
pNew->isAgg = p->isAgg;
pNew->pRightmost = 0;
pNew->addrOpenVirt[0] = -1;
pNew->addrOpenVirt[1] = -1;
pNew->addrOpenVirt[2] = -1;
return pNew;
}
#else