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Fix the CSE mechanism so that it takes into account column affinity

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changes that might be imposed by comparison operators. (CVS 4949)

FossilOrigin-Name: 91cc646e2b0c1d62a1989405cc9384a2c22d98d0
This commit is contained in:
drh
2008-04-01 05:07:14 +00:00
parent 2f7794c111
commit da250ea599
9 changed files with 106 additions and 73 deletions
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10
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.685 2008/04/01 03:27:39 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.686 2008/04/01 05:07:15 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1139,7 +1139,7 @@ struct Expr {
#define EP_Dequoted 0x0040 /* True if the string has been dequoted */
#define EP_InfixFunc 0x0080 /* True for an infix function: LIKE, GLOB, etc */
#define EP_ExpCollate 0x0100 /* Collating sequence specified explicitly */
#define EP_Constant 0x0200 /* A constant expression */
#define EP_AnyAff 0x0200 /* Can take a cached column of any affinity */
/*
** These macros can be used to test, set, or clear bits in the
@@ -1469,7 +1469,7 @@ struct Parse {
struct yColCache {
int iTable; /* Table cursor number */
int iColumn; /* Table column number */
char aff; /* Affinity. Or 0 if none specified */
char affChange; /* True if this register has had an affinity change */
int iReg; /* Register holding value of this column */
} aColCache[10]; /* One for each valid column cache entry */
u32 writeMask; /* Start a write transaction on these databases */
@@ -1838,11 +1838,11 @@ void sqlite3DeleteFrom(Parse*, SrcList*, Expr*);
void sqlite3Update(Parse*, SrcList*, ExprList*, Expr*, int);
WhereInfo *sqlite3WhereBegin(Parse*, SrcList*, Expr*, ExprList**, u8);
void sqlite3WhereEnd(WhereInfo*);
int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int);
int sqlite3ExprCodeGetColumn(Parse*, Table*, int, int, int, int);
void sqlite3ExprCodeMove(Parse*, int, int);
void sqlite3ExprClearColumnCache(Parse*, int);
void sqlite3ExprColumnCacheDisable(Parse*, int);
void sqlite3ExprExpireColumnCacheLines(Parse*, int, int);
void sqlite3ExprCacheAffinityChange(Parse*, int, int);
int sqlite3ExprWritableRegister(Parse*,int,int);
int sqlite3ExprCode(Parse*, Expr*, int);
int sqlite3ExprCodeTemp(Parse*, Expr*, int*);