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Disable sorting by indices if there is a COLLATE subclause in the

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ORDER BY clause. (CVS 713)

FossilOrigin-Name: 2438da791afb53b4f1c7a9ff9705d393c86f3cbd
This commit is contained in:
drh
2002-08-14 03:03:57 +00:00
parent 0c44e2edf3
commit c330af1dca
5 changed files with 33 additions and 13 deletions
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6
src/where.c
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@ -13,7 +13,7 @@
** the WHERE clause of SQL statements. Also found here are subroutines
** to generate VDBE code to evaluate expressions.
**
** $Id: where.c,v 1.61 2002/08/13 23:02:58 drh Exp $
** $Id: where.c,v 1.62 2002/08/14 03:03:57 drh Exp $
*/
#include "sqliteInt.h"
@ -181,6 +181,10 @@ static Index *findSortingIndex(
/* Indices can only be used for ascending sort order */
return 0;
}
if( (pOrderBy->a[i].sortOrder & SQLITE_SO_TYPEMASK)!=SQLITE_SO_UNK ){
/* Do not sort by index if there is a COLLATE clause */
return 0;
}
p = pOrderBy->a[i].pExpr;
if( p->op!=TK_COLUMN || p->iTable!=base ){
/* Can not use an index sort on anything that is not a column in the