From 6be84eeb8d5a72014b1b6e44d0646f69531a1ccf Mon Sep 17 00:00:00 2001
From: Robert Haas
Date: Mon, 14 Mar 2016 14:27:11 -0400
Subject: Update more comments for 96198d94cb7adc664bda341842dc8db671d8be72.

Etsuro Fujita, reviewed (though not completely endorsed) by Ashutosh
Bapat, and slightly expanded by me.
---
 src/backend/optimizer/path/joinpath.c | 3 ++-
 src/include/nodes/relation.h          | 4 +++-
 2 files changed, 5 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/backend/optimizer/path/joinpath.c b/src/backend/optimizer/path/joinpath.c
index 3b898dafee1..f3aced3c931 100644
--- a/src/backend/optimizer/path/joinpath.c
+++ b/src/backend/optimizer/path/joinpath.c
@@ -213,7 +213,8 @@ add_paths_to_joinrel(PlannerInfo *root,
 
 	/*
 	 * 5. If inner and outer relations are foreign tables (or joins) belonging
-	 * to the same server, give the FDW a chance to push down joins.
+	 * to the same server and using the same user mapping, give the FDW a
+	 * chance to push down joins.
 	 */
 	if (joinrel->fdwroutine &&
 		joinrel->fdwroutine->GetForeignJoinPaths)
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h
index 641728bb0f4..bdea72c3f47 100644
--- a/src/include/nodes/relation.h
+++ b/src/include/nodes/relation.h
@@ -448,9 +448,11 @@ typedef struct PlannerInfo
  *		in just as for a baserel, except we don't bother with lateral_vars.
  *
  * If the relation is either a foreign table or a join of foreign tables that
- * all belong to the same foreign server, these fields will be set:
+ * all belong to the same foreign server and use the same user mapping, these
+ * fields will be set:
  *
  *		serverid - OID of foreign server, if foreign table (else InvalidOid)
+ *		umid - OID of user mapping, if foreign table (else InvalidOid)
  *		fdwroutine - function hooks for FDW, if foreign table (else NULL)
  *		fdw_private - private state for FDW, if foreign table (else NULL)
  *
-- 
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