/*
** The following set of routines walk through the parse tree and assign
** a specific database to all table references where the database name
** was left unspecified in the original SQL statement. The pFix structure
** must have been initialized by a prior call to sqlite3FixInit().
**
** These routines are used to make sure that an index, trigger, or
** view in one database does not refer to objects in a different database.
** (Exception: indices, triggers, and views in the TEMP database are
** allowed to refer to anything.) If a reference is explicitly made
** to an object in a different database, an error message is added to
** pParse->zErrMsg and these routines return non-zero. If everything
** checks out, these routines return 0.
*/
int sqlite3FixSrcList(
DbFixer *pFix, /* Context of the fixation */
SrcList *pList /* The Source list to check and modify */
){
int i;
const char *zDb;
struct SrcList_item *pItem;
if( NEVER(pList==0) ) return 0;
zDb = pFix->zDb;
for(i=0, pItem=pList->a; i<pList->nSrc; i++, pItem++){
if( pItem->zDatabase==0 ){
pItem->zDatabase = sqlite3DbStrDup(pFix->pParse->db, zDb);
}else if( sqlite3StrICmp(pItem->zDatabase,zDb)!=0 ){
sqlite3ErrorMsg(pFix->pParse,
"%s %T cannot reference objects in database %s",
pFix->zType, pFix->pName, pItem->zDatabase);
return 1;
}
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_TRIGGER)
if( sqlite3FixSelect(pFix, pItem->pSelect) ) return 1;
if( sqlite3FixExpr(pFix, pItem->pOn) ) return 1;
#endif
}
return 0;
}
int sqlite3FixExpr(
DbFixer *pFix, /* Context of the fixation */
Expr *pExpr /* The expression to be fixed to one database */
){
while( pExpr ){
if( pExpr->op==TK_VARIABLE ){
if( pFix->pParse->db->init.busy ){
pExpr->op = TK_NULL;
}else{
sqlite3ErrorMsg(pFix->pParse, "%s cannot use variables", pFix->zType);
return 1;
}
}
if( ExprHasProperty(pExpr, EP_TokenOnly) ) break;
if( ExprHasProperty(pExpr, EP_xIsSelect) ){
if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
}else{
if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
}
if( sqlite3FixExpr(pFix, pExpr->pRight) ){
return 1;
}
pExpr = pExpr->pLeft;
}
return 0;
}
int sqlite3FixTriggerStep(
DbFixer *pFix, /* Context of the fixation */
TriggerStep *pStep /* The trigger step be fixed to one database */
){
while( pStep ){
if( sqlite3FixSelect(pFix, pStep->pSelect) ){
return 1;
}
if( sqlite3FixExpr(pFix, pStep->pWhere) ){
return 1;
}
if( sqlite3FixExprList(pFix, pStep->pExprList) ){
return 1;
}
#ifndef SQLITE_OMIT_UPSERT
if( pStep->pUpsert ){
Upsert *pUp = pStep->pUpsert;
if( sqlite3FixExprList(pFix, pUp->pUpsertTarget)
|| sqlite3FixExpr(pFix, pUp->pUpsertTargetWhere)
|| sqlite3FixExprList(pFix, pUp->pUpsertSet)
|| sqlite3FixExpr(pFix, pUp->pUpsertWhere)
){
return 1;
}
}
#endif
pStep = pStep->pNext;
}
return 0;
}
/*
** The following set of routines walk through the parse tree and assign
** a specific database to all table references where the database name
** was left unspecified in the original SQL statement. The pFix structure
** must have been initialized by a prior call to sqlite3FixInit().
**
** These routines are used to make sure that an index, trigger, or
** view in one database does not refer to objects in a different database.
** (Exception: indices, triggers, and views in the TEMP database are
** allowed to refer to anything.) If a reference is explicitly made
** to an object in a different database, an error message is added to
** pParse->zErrMsg and these routines return non-zero. If everything
** checks out, these routines return 0.
*/
int sqlite3FixSrcList(
DbFixer *pFix, /* Context of the fixation */
SrcList *pList /* The Source list to check and modify */
){
int i;
const char *zDb;
struct SrcList_item *pItem;
if( NEVER(pList==0) ) return 0;
zDb = pFix->zDb;
for(i=0, pItem=pList->a; i<pList->nSrc; i++, pItem++){
if( pFix->bVarOnly==0 ){
if( pItem->zDatabase && sqlite3StrICmp(pItem->zDatabase, zDb) ){
sqlite3ErrorMsg(pFix->pParse,
"%s %T cannot reference objects in database %s",
pFix->zType, pFix->pName, pItem->zDatabase);
return 1;
}
sqlite3DbFree(pFix->pParse->db, pItem->zDatabase);
pItem->zDatabase = 0;
pItem->pSchema = pFix->pSchema;
}
#if !defined(SQLITE_OMIT_VIEW) || !defined(SQLITE_OMIT_TRIGGER)
if( sqlite3FixSelect(pFix, pItem->pSelect) ) return 1;
if( sqlite3FixExpr(pFix, pItem->pOn) ) return 1;
#endif
if( pItem->fg.isTabFunc && sqlite3FixExprList(pFix, pItem->u1.pFuncArg) ){
return 1;
}
}
return 0;
}
int sqlite3FixTriggerStep(
DbFixer *pFix, /* Context of the fixation */
TriggerStep *pStep /* The trigger step be fixed to one database */
){
while( pStep ){
if( sqlite3FixSelect(pFix, pStep->pSelect) ){
return 1;
}
if( sqlite3FixExpr(pFix, pStep->pWhere) ){
return 1;
}
if( sqlite3FixExprList(pFix, pStep->pExprList) ){
return 1;
}
pStep = pStep->pNext;
}
return 0;
}
int sqlite3FixExpr(
DbFixer *pFix, /* Context of the fixation */
Expr *pExpr /* The expression to be fixed to one database */
){
while( pExpr ){
if( ExprHasAnyProperty(pExpr, EP_TokenOnly) ) break;
if( ExprHasProperty(pExpr, EP_xIsSelect) ){
if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
}else{
if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
}
if( sqlite3FixExpr(pFix, pExpr->pRight) ){
return 1;
}
pExpr = pExpr->pLeft;
}
return 0;
}
int sqlite3FixExpr(
DbFixer *pFix, /* Context of the fixation */
Expr *pExpr /* The expression to be fixed to one database */
){
while( pExpr ){
if( sqlite3FixSelect(pFix, pExpr->pSelect) ){
return 1;
}
if( sqlite3FixExprList(pFix, pExpr->pList) ){
return 1;
}
if( sqlite3FixExpr(pFix, pExpr->pRight) ){
return 1;
}
pExpr = pExpr->pLeft;
}
return 0;
}
int sqlite3FixTriggerStep(
DbFixer *pFix,
TriggerStep *pStep
){
while( pStep ){
if( sqlite3FixSelect(pFix, pStep->pSelect) ){
return 1;
}
if( sqlite3FixExpr(pFix, pStep->pWhere) ){
return 1;
}
if( sqlite3FixExprList(pFix, pStep->pExprList) ){
return 1;
}
pStep = pStep->pNext;
}
return 0;
}
int sqlite3FixExpr(
DbFixer *pFix,
Expr *pExpr
){
while( pExpr ){
if( ExprHasAnyProperty(pExpr, EP_TokenOnly) ) break;
if( ExprHasProperty(pExpr, EP_xIsSelect) ){
if( sqlite3FixSelect(pFix, pExpr->x.pSelect) ) return 1;
}else{
if( sqlite3FixExprList(pFix, pExpr->x.pList) ) return 1;
}
if( sqlite3FixExpr(pFix, pExpr->pRight) ){
return 1;
}
pExpr = pExpr->pLeft;
}
return 0;
}
int sqlite3FixSelect(
DbFixer *pFix, /* Context of the fixation */
Select *pSelect /* The SELECT statement to be fixed to one database */
){
while( pSelect ){
if( sqlite3FixExprList(pFix, pSelect->pEList) ){
return 1;
}
if( sqlite3FixSrcList(pFix, pSelect->pSrc) ){
return 1;
}
if( sqlite3FixExpr(pFix, pSelect->pWhere) ){
return 1;
}
if( sqlite3FixExprList(pFix, pSelect->pGroupBy) ){
return 1;
}
if( sqlite3FixExpr(pFix, pSelect->pHaving) ){
return 1;
}
if( sqlite3FixExprList(pFix, pSelect->pOrderBy) ){
return 1;
}
if( sqlite3FixExpr(pFix, pSelect->pLimit) ){
return 1;
}
if( pSelect->pWith ){
int i;
for(i=0; i<pSelect->pWith->nCte; i++){
if( sqlite3FixSelect(pFix, pSelect->pWith->a[i].pSelect) ){
return 1;
}
}
}
pSelect = pSelect->pPrior;
}
return 0;
}
