diff -U3 /tmp/cirrus-ci-build/src/test/regress/expected/partition_join.out /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/partition_join.out
--- /tmp/cirrus-ci-build/src/test/regress/expected/partition_join.out	2024-12-26 01:41:18.101028754 +0000
+++ /tmp/cirrus-ci-build/src/bin/pg_upgrade/tmp_check/results/partition_join.out	2024-12-26 01:47:01.964386223 +0000
@@ -65,31 +65,24 @@
 -- inner join with partially-redundant join clauses
 EXPLAIN (COSTS OFF)
 SELECT t1.a, t1.c, t2.b, t2.c FROM prt1 t1, prt2 t2 WHERE t1.a = t2.a AND t1.a = t2.b ORDER BY t1.a, t2.b;
-                          QUERY PLAN                           
----------------------------------------------------------------
- Sort
-   Sort Key: t1.a
+                       QUERY PLAN                        
+---------------------------------------------------------
+ Merge Join
+   Merge Cond: (t1.a = t2.a)
    ->  Append
-         ->  Merge Join
-               Merge Cond: (t1_1.a = t2_1.a)
-               ->  Index Scan using iprt1_p1_a on prt1_p1 t1_1
-               ->  Sort
-                     Sort Key: t2_1.b
-                     ->  Seq Scan on prt2_p1 t2_1
-                           Filter: (a = b)
-         ->  Hash Join
-               Hash Cond: (t1_2.a = t2_2.a)
-               ->  Seq Scan on prt1_p2 t1_2
-               ->  Hash
-                     ->  Seq Scan on prt2_p2 t2_2
-                           Filter: (a = b)
-         ->  Hash Join
-               Hash Cond: (t1_3.a = t2_3.a)
-               ->  Seq Scan on prt1_p3 t1_3
-               ->  Hash
-                     ->  Seq Scan on prt2_p3 t2_3
-                           Filter: (a = b)
-(22 rows)
+         ->  Index Scan using iprt1_p1_a on prt1_p1 t1_1
+         ->  Index Scan using iprt1_p2_a on prt1_p2 t1_2
+         ->  Index Scan using iprt1_p3_a on prt1_p3 t1_3
+   ->  Sort
+         Sort Key: t2.b
+         ->  Append
+               ->  Seq Scan on prt2_p1 t2_1
+                     Filter: (a = b)
+               ->  Seq Scan on prt2_p2 t2_2
+                     Filter: (a = b)
+               ->  Seq Scan on prt2_p3 t2_3
+                     Filter: (a = b)
+(15 rows)
 
 SELECT t1.a, t1.c, t2.b, t2.c FROM prt1 t1, prt2 t2 WHERE t1.a = t2.a AND t1.a = t2.b ORDER BY t1.a, t2.b;
  a  |  c   | b  |  c