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Fix a problem that could cause a crash when a shared-cache schema contains column default values. (CVS 6353)

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FossilOrigin-Name: afadddc34eee3d6a39102b790ce1a869b33d4286
This commit is contained in:
danielk1977
2009-03-17 17:48:59 +00:00
parent 3ded8d6f2a
commit 21822c58b0
6 changed files with 59 additions and 24 deletions
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6
src/build.c
View File

@@ -22,7 +22,7 @@
** COMMIT
** ROLLBACK
**
** $Id: build.c,v 1.522 2009/03/14 08:37:24 danielk1977 Exp $
** $Id: build.c,v 1.523 2009/03/17 17:49:00 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -1111,7 +1111,9 @@ void sqlite3AddDefaultValue(Parse *pParse, Expr *pExpr){
** is required by pragma table_info.
*/
sqlite3ExprDelete(db, pCol->pDflt);
pCol->pDflt = sqlite3ExprDup(db, pExpr, EXPRDUP_REDUCE|EXPRDUP_SPAN);
pCol->pDflt = sqlite3ExprDup(
db, pExpr, EXPRDUP_REDUCE|EXPRDUP_DISTINCTSPAN
);
}
}
sqlite3ExprDelete(db, pExpr);

21
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 1.418 2009/03/05 14:53:18 danielk1977 Exp $
** $Id: expr.c,v 1.419 2009/03/17 17:49:00 danielk1977 Exp $
*/
#include "sqliteInt.h"
@@ -649,7 +649,9 @@ void sqlite3DequoteExpr(sqlite3 *db, Expr *p){
return;
}
ExprSetProperty(p, EP_Dequoted);
if( p->token.dyn==0 && !ExprHasProperty(p, EP_Reduced) ){
if( p->token.dyn==0
&& !ExprHasAnyProperty(p, EP_Reduced|EP_TokenOnly|EP_SpanOnly)
){
sqlite3TokenCopy(db, &p->token, &p->token);
}
sqlite3Dequote((char*)p->token.z);
@@ -679,7 +681,7 @@ static int dupedExprStructSize(Expr *p, int flags){
nSize = EXPR_FULLSIZE;
}else if( p->pLeft || p->pRight || p->pColl || p->x.pList ){
nSize = EXPR_REDUCEDSIZE;
}else if( flags&EXPRDUP_SPAN ){
}else if( flags&(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN) ){
nSize = EXPR_SPANONLYSIZE;
}else{
nSize = EXPR_TOKENONLYSIZE;
@@ -696,7 +698,9 @@ static int dupedExprStructSize(Expr *p, int flags){
*/
static int dupedExprNodeSize(Expr *p, int flags){
int nByte = dupedExprStructSize(p, flags) + (p->token.z ? p->token.n + 1 : 0);
if( flags&EXPRDUP_SPAN && (p->token.z!=p->span.z || p->token.n!=p->span.n) ){
if( (flags&EXPRDUP_DISTINCTSPAN)
|| (flags&EXPRDUP_SPAN && (p->token.z!=p->span.z || p->token.n!=p->span.n))
){
nByte += p->span.n;
}
return (nByte+7)&~7;
@@ -722,7 +726,7 @@ static int dupedExprSize(Expr *p, int flags){
if( p ){
nByte = dupedExprNodeSize(p, flags);
if( flags&EXPRDUP_REDUCE ){
int f = flags&(~EXPRDUP_SPAN);
int f = flags&(~(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN));
nByte += dupedExprSize(p->pLeft, f) + dupedExprSize(p->pRight, f);
}
}
@@ -740,7 +744,8 @@ static int dupedExprSize(Expr *p, int flags){
static Expr *exprDup(sqlite3 *db, Expr *p, int flags, u8 **pzBuffer){
Expr *pNew = 0; /* Value to return */
if( p ){
const int isRequireSpan = (flags&EXPRDUP_SPAN);
const int isRequireDistinctSpan = (flags&EXPRDUP_DISTINCTSPAN);
const int isRequireSpan = (flags&(EXPRDUP_SPAN|EXPRDUP_DISTINCTSPAN));
const int isReduced = (flags&EXPRDUP_REDUCE);
u8 *zAlloc;
@@ -791,7 +796,9 @@ static Expr *exprDup(sqlite3 *db, Expr *p, int flags, u8 **pzBuffer){
if( 0==((p->flags|pNew->flags) & EP_TokenOnly) ){
/* Fill in the pNew->span token, if required. */
if( isRequireSpan ){
if( p->token.z!=p->span.z || p->token.n!=p->span.n ){
if( isRequireDistinctSpan
|| p->token.z!=p->span.z || p->token.n!=p->span.n
){
pNew->span.z = &zAlloc[nNewSize+nToken];
memcpy((char *)pNew->span.z, p->span.z, p->span.n);
pNew->span.dyn = 0;

7
src/sqliteInt.h
View File

@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.841 2009/03/16 13:19:36 danielk1977 Exp $
** @(#) $Id: sqliteInt.h,v 1.842 2009/03/17 17:49:00 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -1522,8 +1522,9 @@ struct Expr {
** Flags passed to the sqlite3ExprDup() function. See the header comment
** above sqlite3ExprDup() for details.
*/
#define EXPRDUP_REDUCE 0x0001
#define EXPRDUP_SPAN 0x0002
#define EXPRDUP_REDUCE 0x0001
#define EXPRDUP_SPAN 0x0002
#define EXPRDUP_DISTINCTSPAN 0x0004
/*
** A list of expressions. Each expression may optionally have a