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Clean up handling of inherited-table update queries, per bug report

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from Sebastian Böck.  The fix involves being more consistent about
when rangetable entries are copied or modified.  Someday we really
need to fix this stuff to not scribble on its input data structures
in the first place...
This commit is contained in:
Tom Lane
2004-10-02 22:39:49 +00:00
parent 19241421f2
commit 47aa95e951
5 changed files with 78 additions and 55 deletions
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12
src/backend/optimizer/util/clauses.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.180 2004/08/29 05:06:44 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/util/clauses.c,v 1.181 2004/10/02 22:39:48 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -3254,10 +3254,20 @@ query_tree_mutator(Query *query,
CHECKFLATCOPY(newrte->subquery, rte->subquery, Query);
MUTATE(newrte->subquery, newrte->subquery, Query *);
}
else
{
/* else, copy RT subqueries as-is */
newrte->subquery = copyObject(rte->subquery);
}
break;
case RTE_JOIN:
if (!(flags & QTW_IGNORE_JOINALIASES))
MUTATE(newrte->joinaliasvars, rte->joinaliasvars, List *);
else
{
/* else, copy join aliases as-is */
newrte->joinaliasvars = copyObject(rte->joinaliasvars);
}
break;
case RTE_FUNCTION:
MUTATE(newrte->funcexpr, rte->funcexpr, Node *);