database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-08 03:22:21 +03:00
Code Activity

Optimizer now converts OR-connected WHERE-clause terms into an IN operator so

Browse Source 
that they can be used with indices.  There are known problems with the
ORDER BY optimization in this and in several prior check-ins.  This
check-in is not recommended for production use. (CVS 2569)

FossilOrigin-Name: d23c8bf81e508722e92ff1b9c8bc98dc026a31f2
This commit is contained in:
drh
2005-07-29 15:10:17 +00:00
parent ed37800693
commit 6c30be8e51
5 changed files with 146 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/expr.c
View File

@@ -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 1.213 2005/07/21 18:23:20 drh Exp $
** $Id: expr.c,v 1.214 2005/07/29 15:10:18 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -1334,7 +1334,7 @@ void sqlite3CodeSubselect(Parse *pParse, Expr *pExpr){
** this code only executes once. Because for a non-constant
** expression we need to rerun this code each time.
*/
if( testAddr>=0 && !sqlite3ExprIsConstant(pE2) ){
if( testAddr>0 && !sqlite3ExprIsConstant(pE2) ){
VdbeOp *aOp = sqlite3VdbeGetOp(v, testAddr-1);
int i;
for(i=0; i<4; i++){