From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 8 Mar 2001 01:49:01 +0000 (+0000)
Subject: A subplan invoked within an aggregate function's argument should
X-Git-Url: http://waps.l3s.uni-hannover.de/gitweb/?a=commitdiff_plain;h=86207d84f46d425d82d07b8eeec179fa96068c2e;p=users%2Fbernd%2Fpostgres.git

A subplan invoked within an aggregate function's argument should
be allowed to receive ungrouped variables of the current query level.
Curious that no one reported this bug before...
---

diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index 5ab45f67ac..9a3ac10536 100644
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -542,6 +542,14 @@ check_subplans_for_ungrouped_vars_walker(Node *node,
 	if (node == NULL)
 		return false;
 
+	/*
+	 * If we find an aggregate function, do not recurse into its
+	 * arguments.  Subplans invoked within aggregate calls are allowed
+	 * to receive ungrouped variables.
+	 */
+	if (IsA(node, Aggref))
+		return false;
+
 	/*
 	 * We can ignore Vars other than in subplan args lists, since the
 	 * parser already checked 'em.