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Update the WHERE clause processing infrastructure in preparation for adding

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multi-index OR evaluation. (CVS 6037)

FossilOrigin-Name: 78401b33febf678cfeec2a35514eb4172de420ab
This commit is contained in:
drh
2008-12-17 19:22:15 +00:00
parent fd7f045225
commit 700a22612b
4 changed files with 141 additions and 46 deletions
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12
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.810 2008/12/17 17:30:26 danielk1977 Exp $
** @(#) $Id: sqliteInt.h,v 1.811 2008/12/17 19:22:16 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1539,11 +1539,10 @@ struct SrcList {
**
*/
struct WhereLevel {
int iFrom; /* Which entry in the FROM clause */
int wsFlags; /* "Where-Scan" flags show the choosen scan strategy */
int iMem; /* First memory cell used by this level */
u32 wsFlags; /* "Where-Scan" flags show the choosen scan strategy */
int iLeftJoin; /* Memory cell used to implement LEFT OUTER JOIN */
Index *pIdx; /* Index used. NULL if no index */
struct WhereTerm *pTerm; /* Where term containing OR clause */
int iTabCur; /* The VDBE cursor used to access the table */
int iIdxCur; /* The VDBE cursor used to access pIdx */
int addrBrk; /* Jump here to break out of the loop */
@@ -1552,8 +1551,9 @@ struct WhereLevel {
int addrFirst; /* First instruction of interior of the loop */
int op, p1, p2; /* Opcode used to terminate the loop */
u8 p5; /* P5 operand of the opcode that terminates the loop */
int nEq; /* Number of == or IN constraints on this loop */
int nIn; /* Number of IN operators constraining this loop */
u8 iFrom; /* Which entry in the FROM clause */
u16 nEq; /* Number of == or IN constraints on this loop */
u16 nIn; /* Number of IN operators constraining this loop */
struct InLoop {
int iCur; /* The VDBE cursor used by this IN operator */
int addrInTop; /* Top of the IN loop */