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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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10
src/backend/optimizer/prep/prepunion.c
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@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.97 2003/06/29 23:05:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/prepunion.c,v 1.98 2003/07/16 17:25:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -85,6 +85,14 @@ plan_set_operations(Query *parse)
Assert(topop && IsA(topop, SetOperationStmt));
/* check for unsupported stuff */
Assert(parse->utilityStmt == NULL);
Assert(parse->jointree->fromlist == NIL);
Assert(parse->jointree->quals == NULL);
Assert(parse->groupClause == NIL);
Assert(parse->havingQual == NULL);
Assert(parse->distinctClause == NIL);
/*
* Find the leftmost component Query. We need to use its column names
* for all generated tlists (else SELECT INTO won't work right).