From 6d79d251019314f4abd29ce8138cf4da10a51d6f Mon Sep 17 00:00:00 2001
From: Hadi Moshayedi <hadi@moshayedi.net>
Date: Mon, 6 Nov 2017 23:16:43 -0500
Subject: [PATCH] Fix a relcache reference leak in stats collection.

In DistributedTablesSize() we didn't close the relations that had
replication factor > 2. This caused relcache reference leaks, and
warning messages like following in logs:

    WARNING:  relcache reference leak: relation "researchers" not closed
---
 src/backend/distributed/utils/statistics_collection.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/backend/distributed/utils/statistics_collection.c b/src/backend/distributed/utils/statistics_collection.c
index 246175aff..ce63c088b 100644
--- a/src/backend/distributed/utils/statistics_collection.c
+++ b/src/backend/distributed/utils/statistics_collection.c
@@ -397,6 +397,7 @@ DistributedTablesSize(List *distTableOids)
 		if (PartitionMethod(relationId) == DISTRIBUTE_BY_HASH &&
 			!SingleReplicatedTable(relationId))
 		{
+			heap_close(relation, AccessShareLock);
 			continue;
 		}