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Simplify the VM code that implements WHERE claues. (CVS 6067)

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FossilOrigin-Name: fa95f843e179a38f663978d675607c4c3037928d
This commit is contained in:
drh
2008-12-28 16:55:25 +00:00
parent 3460d19c85
commit 6df2acd216
4 changed files with 61 additions and 43 deletions
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15
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.815 2008/12/23 23:56:22 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.816 2008/12/28 16:55:25 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1595,11 +1595,13 @@ struct WhereLevel {
/*
** Flags appropriate for the wctrlFlags parameter of sqlite3WhereBegin().
*/
#define WHERE_ORDERBY_NORMAL 0x000 /* No-op */
#define WHERE_ORDERBY_MIN 0x001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX 0x002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED 0x004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_FILL_ROWSET 0x008 /* Save results in a RowSet object */
#define WHERE_ORDERBY_NORMAL 0x0000 /* No-op */
#define WHERE_ORDERBY_MIN 0x0001 /* ORDER BY processing for min() func */
#define WHERE_ORDERBY_MAX 0x0002 /* ORDER BY processing for max() func */
#define WHERE_ONEPASS_DESIRED 0x0004 /* Want to do one-pass UPDATE/DELETE */
#define WHERE_FILL_ROWSET 0x0008 /* Save results in a RowSet object */
#define WHERE_OMIT_OPEN 0x0010 /* Table cursor are already open */
#define WHERE_OMIT_CLOSE 0x0020 /* Omit close of table & index cursors */
/*
** The WHERE clause processing routine has two halves. The
@@ -1610,6 +1612,7 @@ struct WhereLevel {
*/
struct WhereInfo {
Parse *pParse; /* Parsing and code generating context */
u16 wctrlFlags; /* Flags originally passed to sqlite3WhereBegin() */
u8 okOnePass; /* Ok to use one-pass algorithm for UPDATE or DELETE */
int regRowSet; /* Store rowids in this rowset if >=0 */
SrcList *pTabList; /* List of tables in the join */