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Fix problems with subselects used in GROUP BY expressions, per gripe

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from Philip Warner.  Side effect of change is that GROUP BY expressions
will not be re-evaluated at multiple plan levels anymore, whereas this
sometimes happened with old code.
This commit is contained in:
Tom Lane
2001-10-30 19:58:58 +00:00
parent 512a3aef36
commit 96ca8ffebc
4 changed files with 167 additions and 103 deletions
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4
src/include/optimizer/clauses.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: clauses.h,v 1.47 2001/10/28 06:26:07 momjian Exp $
* $Id: clauses.h,v 1.48 2001/10/30 19:58:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -44,7 +44,7 @@ extern List *pull_agg_clause(Node *clause);
extern bool contain_subplans(Node *clause);
extern List *pull_subplans(Node *clause);
extern void check_subplans_for_ungrouped_vars(Node *clause, Query *query);
extern void check_subplans_for_ungrouped_vars(Query *query);
extern bool contain_noncachable_functions(Node *clause);