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Add defenses against trying to attach qual conditions to a setOperation

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query node, since that won't work unless the planner is upgraded.
Someday we should try to support at least some cases of this, but for
now just plug the hole in the dike.  Per discussion with Dmitry Tkach.
This commit is contained in:
Tom Lane
2003-07-16 17:25:48 +00:00
parent 96be4b28a3
commit 93236b58e0
4 changed files with 64 additions and 7 deletions
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21
src/backend/rewrite/rewriteHandler.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.122 2003/07/03 16:34:25 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.123 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -148,18 +148,31 @@ rewriteRuleAction(Query *parsetree,
* As above, the action's jointree must not share substructure with the
* main parsetree's.
*/
if (sub_action->jointree != NULL)
if (sub_action->commandType != CMD_UTILITY)
{
bool keeporig;
List *newjointree;
Assert(sub_action->jointree != NULL);
keeporig = (!rangeTableEntry_used((Node *) sub_action->jointree,
rt_index, 0)) &&
(rangeTableEntry_used(rule_qual, rt_index, 0) ||
rangeTableEntry_used(parsetree->jointree->quals, rt_index, 0));
newjointree = adjustJoinTreeList(parsetree, !keeporig, rt_index);
sub_action->jointree->fromlist =
nconc(newjointree, sub_action->jointree->fromlist);
if (newjointree != NIL)
{
/*
* If sub_action is a setop, manipulating its jointree will do
* no good at all, because the jointree is dummy. (Perhaps
* someday we could push the joining and quals down to the
* member statements of the setop?)
*/
if (sub_action->setOperations != NULL)
elog(ERROR, "Conditional UNION/INTERSECT/EXCEPT statements are not implemented");
sub_action->jointree->fromlist =
nconc(newjointree, sub_action->jointree->fromlist);
}
}
/*