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Disable the LIKE optimization if the affinity of the LHS column is

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not TEXT.  Ticket #3901. (CVS 6727)

FossilOrigin-Name: a255c645c46ae03b65f862858fe57e462076e1fc
This commit is contained in:
drh
2009-06-07 23:45:10 +00:00
parent 49008596ed
commit c4ac22e905
6 changed files with 127 additions and 26 deletions
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10
src/where.c
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@@ -16,7 +16,7 @@
** so is applicable. Because this module is responsible for selecting
** indices, you might also think of this module as the "query optimizer".
**
** $Id: where.c,v 1.401 2009/06/06 15:17:28 drh Exp $
** $Id: where.c,v 1.402 2009/06/07 23:45:11 drh Exp $
*/
#include "sqliteInt.h"
@@ -654,17 +654,15 @@ static int isLikeOrGlob(
}
pColl = sqlite3ExprCollSeq(pParse, pLeft);
assert( pColl!=0 || pLeft->iColumn==-1 );
if( pColl==0 ){
/* No collation is defined for the ROWID. Use the default. */
pColl = db->pDfltColl;
}
if( pColl==0 ) return 0;
if( (pColl->type!=SQLITE_COLL_BINARY || *pnoCase) &&
(pColl->type!=SQLITE_COLL_NOCASE || !*pnoCase) ){
return 0;
}
if( sqlite3ExprAffinity(pLeft)!=SQLITE_AFF_TEXT ) return 0;
z = pRight->u.zToken;
cnt = 0;
if( z ){
if( ALWAYS(z) ){
while( (c=z[cnt])!=0 && c!=wc[0] && c!=wc[1] && c!=wc[2] ){
cnt++;
}