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Changes to support recursive triggers.

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FossilOrigin-Name: 9b9c19211593d5ff7b39254a29c284560a8bcedb
This commit is contained in:
dan
2009-08-28 18:53:45 +00:00
parent e408edac16
commit 165921a742
25 changed files with 889 additions and 581 deletions
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33
src/resolve.c
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@@ -137,6 +137,7 @@ static int lookupName(
struct SrcList_item *pMatch = 0; /* The matching pSrcList item */
NameContext *pTopNC = pNC; /* First namecontext in the list */
Schema *pSchema = 0; /* Schema of the expression */
int isTrigger = 0; /* True if a new.* or old.* reference. */
assert( pNC ); /* the name context cannot be NULL. */
assert( zCol ); /* The Z in X.Y.Z cannot be NULL */
@@ -222,33 +223,29 @@ static int lookupName(
/* If we have not already resolved the name, then maybe
** it is a new.* or old.* trigger argument reference
*/
if( zDb==0 && zTab!=0 && cnt==0 && pParse->trigStack!=0 ){
TriggerStack *pTriggerStack = pParse->trigStack;
if( zDb==0 && zTab!=0 && cnt==0 && pParse->pTriggerTab!=0 ){
Table *pTab = 0;
u32 *piColMask = 0;
if( pTriggerStack->newIdx != -1 && sqlite3StrICmp("new", zTab) == 0 ){
pExpr->iTable = pTriggerStack->newIdx;
assert( pTriggerStack->pTab );
pTab = pTriggerStack->pTab;
piColMask = &(pTriggerStack->newColMask);
}else if( pTriggerStack->oldIdx != -1 && sqlite3StrICmp("old", zTab)==0 ){
pExpr->iTable = pTriggerStack->oldIdx;
assert( pTriggerStack->pTab );
pTab = pTriggerStack->pTab;
piColMask = &(pTriggerStack->oldColMask);
if( pParse->triggerOp!=TK_DELETE && sqlite3StrICmp("new",zTab) == 0 ){
pExpr->iTable = 1;
pTab = pParse->pTriggerTab;
piColMask = &(pParse->newmask);
}else if( pParse->triggerOp!=TK_INSERT && sqlite3StrICmp("old",zTab)==0 ){
pExpr->iTable = 0;
pTab = pParse->pTriggerTab;
piColMask = &(pParse->oldmask);
}
if( pTab ){
int iCol;
Column *pCol = pTab->aCol;
pSchema = pTab->pSchema;
cntTab++;
for(iCol=0; iCol < pTab->nCol; iCol++, pCol++) {
isTrigger = 1;
for(iCol=0; iCol<pTab->nCol; iCol++){
Column *pCol = &pTab->aCol[iCol];
if( sqlite3StrICmp(pCol->zName, zCol)==0 ){
cnt++;
pExpr->iColumn = iCol==pTab->iPKey ? -1 : (i16)iCol;
pExpr->pTab = pTab;
testcase( iCol==31 );
testcase( iCol==32 );
if( iCol>=32 ){
@@ -382,6 +379,10 @@ lookupname_end:
if( pTopNC==pNC ) break;
pTopNC = pTopNC->pNext;
}
if( isTrigger ){
pExpr->pTab = pParse->pTriggerTab;
pExpr->op = TK_TRIGGER;
}
return WRC_Prune;
} else {
return WRC_Abort;