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Ooops, didn't cut-and-paste quite enough code from ResolveNew; 

with result that flatten_join_alias_vars failed to descend into subselects.
This commit is contained in:
Tom Lane 2003-01-16 18:26:02 +00:00
parent 57ce0f84f2
commit 136828c699
1 changed files with 19 additions and 1 deletions
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20
src/backend/optimizer/util/var.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/var.c,v 1.44 2003/01/15 19:35:44 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/var.c,v 1.45 2003/01/16 18:26:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -360,6 +360,23 @@ flatten_join_alias_vars_mutator(Node *node,
/* expand it; recurse in case join input is itself a join */
return flatten_join_alias_vars_mutator(newvar, context);
}
/*
* Since expression_tree_mutator won't touch subselects, we have to
* handle them specially.
*/
if (IsA(node, SubLink))
{
SubLink *sublink = (SubLink *) node;
SubLink *newnode;
FLATCOPY(newnode, sublink, SubLink);
MUTATE(newnode->lefthand, sublink->lefthand, List *,
flatten_join_alias_vars_mutator, context);
MUTATE(newnode->subselect, sublink->subselect, Node *,
flatten_join_alias_vars_mutator, context);
return (Node *) newnode;
}
if (IsA(node, Query))
{
/* Recurse into RTE subquery or not-yet-planned sublink subquery */
@ -375,6 +392,7 @@ flatten_join_alias_vars_mutator(Node *node,
}
/* Already-planned tree not supported */
Assert(!is_subplan(node));
return expression_tree_mutator(node, flatten_join_alias_vars_mutator,
(void *) context);
}