database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-06 15:49:35 +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/sqliteInt.h
View File

@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.835 2009/02/23 16:52:08 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.836 2009/02/23 17:33:50 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1601,6 +1601,7 @@ struct SrcList {
u8 isPopulated; /* Temporary table associated with SELECT is populated */
u8 jointype; /* Type of join between this able and the previous */
u8 notIndexed; /* True if there is a NOT INDEXED clause */
u8 usesRowid; /* True if the rowid field is read */
int iCursor; /* The VDBE cursor number used to access this table */
Expr *pOn; /* The ON clause of a join */
IdList *pUsing; /* The USING clause of a join */