fix-alias-usage-in-postgres_fdw-explain.patch

diff --git a/contrib/postgres_fdw/expected/postgres_fdw.out b/contrib/postgres_fdw/expected/postgres_fdw.out
index 14180ee..5f7aa31 100644
--- a/contrib/postgres_fdw/expected/postgres_fdw.out
+++ b/contrib/postgres_fdw/expected/postgres_fdw.out
@@ -8507,7 +8507,7 @@ SELECT t1.a,t2.b,t2.c FROM fprt1 t1 LEFT JOIN (SELECT * FROM fprt2 WHERE a < 10)
 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Foreign Scan
    Output: t1.a, ftprt2_p1.b, ftprt2_p1.c
-   Relations: (public.ftprt1_p1 t1) LEFT JOIN (public.ftprt2_p1 fprt2)
+   Relations: (public.ftprt1_p1 t1) LEFT JOIN (public.ftprt2_p1)
    Remote SQL: SELECT r5.a, r6.b, r6.c FROM (public.fprt1_p1 r5 LEFT JOIN public.fprt2_p1 r6 ON (((r5.a = r6.b)) AND ((r5.b = r6.a)) AND ((r6.a < 10)))) WHERE ((r5.a < 10)) ORDER BY r5.a ASC NULLS LAST, r6.b ASC NULLS LAST, r6.c ASC NULLS LAST
 (4 rows)
 
@@ -8689,17 +8689,17 @@ SELECT a, sum(b), min(b), count(*) FROM pagg_tab GROUP BY a HAVING avg(b) < 22 O
 SET enable_partitionwise_aggregate TO true;
 EXPLAIN (COSTS OFF)
 SELECT a, sum(b), min(b), count(*) FROM pagg_tab GROUP BY a HAVING avg(b) < 22 ORDER BY 1;
-                              QUERY PLAN                              
-----------------------------------------------------------------------
+                         QUERY PLAN                          
+-------------------------------------------------------------
  Sort
    Sort Key: fpagg_tab_p1.a
    ->  Append
          ->  Foreign Scan
-               Relations: Aggregate on (public.fpagg_tab_p1 pagg_tab)
+               Relations: Aggregate on (public.fpagg_tab_p1)
          ->  Foreign Scan
-               Relations: Aggregate on (public.fpagg_tab_p2 pagg_tab)
+               Relations: Aggregate on (public.fpagg_tab_p2)
          ->  Foreign Scan
-               Relations: Aggregate on (public.fpagg_tab_p3 pagg_tab)
+               Relations: Aggregate on (public.fpagg_tab_p3)
 (9 rows)
 
 SELECT a, sum(b), min(b), count(*) FROM pagg_tab GROUP BY a HAVING avg(b) < 22 ORDER BY 1;
diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c
index fa14296..1bed907 100644
--- a/contrib/postgres_fdw/postgres_fdw.c
+++ b/contrib/postgres_fdw/postgres_fdw.c
@@ -576,7 +576,6 @@ postgresGetForeignRelSize(PlannerInfo *root,
 	RangeTblEntry *rte = planner_rt_fetch(baserel->relid, root);
 	const char *namespace;
 	const char *relname;
-	const char *refname;
 
 	/*
 	 * We use PgFdwRelationInfo to pass various information to subsequent
@@ -727,13 +726,12 @@ postgresGetForeignRelSize(PlannerInfo *root,
 	fpinfo->relation_name = makeStringInfo();
 	namespace = get_namespace_name(get_rel_namespace(foreigntableid));
 	relname = get_rel_name(foreigntableid);
-	refname = rte->eref->aliasname;
 	appendStringInfo(fpinfo->relation_name, "%s.%s",
 					 quote_identifier(namespace),
 					 quote_identifier(relname));
-	if (*refname && strcmp(refname, relname) != 0)
+	if (rte->alias && strcmp(rte->alias->aliasname, relname) != 0)
 		appendStringInfo(fpinfo->relation_name, " %s",
-						 quote_identifier(rte->eref->aliasname));
+						 quote_identifier(rte->alias->aliasname));
 
 	/* No outer and inner relations. */
 	fpinfo->make_outerrel_subquery = false;