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

Scan an index instead of a table for "SELECT count(*) FROM <tbl>" queries. Because an index is usually smaller than a table on disk, this saves some IO. (CVS 6315)

Browse Source 
FossilOrigin-Name: 294ba6f743c9132dce0e73da480bd3c2071e7239
This commit is contained in:
danielk1977
2009-02-23 17:33:49 +00:00
parent 699b3d4f89
commit e2d7b24d08
9 changed files with 82 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
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 1.414 2009/02/20 10:58:42 danielk1977 Exp $
** $Id: expr.c,v 1.415 2009/02/23 17:33:50 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -931,6 +931,7 @@ SrcList *sqlite3SrcListDup(sqlite3 *db, SrcList *p, int flags){
pNewItem->pOn = sqlite3ExprDup(db, pOldItem->pOn, flags);
pNewItem->pUsing = sqlite3IdListDup(db, pOldItem->pUsing);
pNewItem->colUsed = pOldItem->colUsed;
pNewItem->usesRowid = pOldItem->usesRowid;
}
return pNew;
}