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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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37
src/expr.c
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@@ -1521,7 +1521,7 @@ void sqlite3CodeSubselect(
** If all of the above are false, then we can run this code just once
** save the results, and reuse the same result on subsequent invocations.
*/
if( !ExprHasAnyProperty(pExpr, EP_VarSelect) && !pParse->trigStack ){
if( !ExprHasAnyProperty(pExpr, EP_VarSelect) && !pParse->pTriggerTab ){
int mem = ++pParse->nMem;
sqlite3VdbeAddOp1(v, OP_If, mem);
testAddr = sqlite3VdbeAddOp2(v, OP_Integer, 1, mem);
@@ -2556,6 +2556,17 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
break;
}
case TK_TRIGGER: {
sqlite3VdbeAddOp3(v, OP_TriggerVal, pExpr->iColumn, target,pExpr->iTable);
assert( pExpr->pTab );
VdbeComment((v, "%s.%s",
(pExpr->iTable ? "new" : "old"),
(pExpr->iColumn<0 ? "rowid" : pExpr->pTab->aCol[pExpr->iColumn].zName)
));
break;
}
/*
** Form A:
** CASE x WHEN e1 THEN r1 WHEN e2 THEN r2 ... WHEN eN THEN rN ELSE y END
@@ -2640,24 +2651,20 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
}
#ifndef SQLITE_OMIT_TRIGGER
case TK_RAISE: {
if( !pParse->trigStack ){
int vrc;
if( !pParse->pTriggerTab ){
sqlite3ErrorMsg(pParse,
"RAISE() may only be used within a trigger-program");
return 0;
}
if( pExpr->affinity!=OE_Ignore ){
assert( pExpr->affinity==OE_Rollback ||
pExpr->affinity == OE_Abort ||
pExpr->affinity == OE_Fail );
assert( !ExprHasProperty(pExpr, EP_IntValue) );
sqlite3VdbeAddOp4(v, OP_Halt, SQLITE_CONSTRAINT, pExpr->affinity, 0,
pExpr->u.zToken, 0);
} else {
assert( pExpr->affinity == OE_Ignore );
sqlite3VdbeAddOp2(v, OP_ContextPop, 0, 0);
sqlite3VdbeAddOp2(v, OP_Goto, 0, pParse->trigStack->ignoreJump);
VdbeComment((v, "raise(IGNORE)"));
}
assert( pExpr->affinity==OE_Rollback
|| pExpr->affinity==OE_Abort
|| pExpr->affinity==OE_Fail
|| pExpr->affinity==OE_Ignore
);
assert( !ExprHasProperty(pExpr, EP_IntValue) );
vrc = (pExpr->affinity==OE_Ignore ? SQLITE_OK : SQLITE_CONSTRAINT);
sqlite3VdbeAddOp4(v, OP_Halt, vrc, pExpr->affinity, 0, pExpr->u.zToken,0);
break;
}
#endif