diff -U3 /home/postgres/pgsql/src/test/regress/expected/partition_prune.out /home/postgres/pgsql/src/test/regress/results/partition_prune.out
--- /home/postgres/pgsql/src/test/regress/expected/partition_prune.out	2019-04-01 12:39:52.613109088 -0400
+++ /home/postgres/pgsql/src/test/regress/results/partition_prune.out	2019-04-01 13:18:02.852615395 -0400
@@ -3409,24 +3409,18 @@
 --------------------------
  Update on pp_lp
    Update on pp_lp1
-   Update on pp_lp2
    ->  Seq Scan on pp_lp1
          Filter: (a = 1)
-   ->  Seq Scan on pp_lp2
-         Filter: (a = 1)
-(7 rows)
+(4 rows)
 
 explain (costs off) delete from pp_lp where a = 1;
         QUERY PLAN        
 --------------------------
  Delete on pp_lp
    Delete on pp_lp1
-   Delete on pp_lp2
    ->  Seq Scan on pp_lp1
          Filter: (a = 1)
-   ->  Seq Scan on pp_lp2
-         Filter: (a = 1)
-(7 rows)
+(4 rows)
 
 set constraint_exclusion = 'off'; -- this should not affect the result.
 explain (costs off) select * from pp_lp where a = 1;
@@ -3444,24 +3438,18 @@
 --------------------------
  Update on pp_lp
    Update on pp_lp1
-   Update on pp_lp2
    ->  Seq Scan on pp_lp1
          Filter: (a = 1)
-   ->  Seq Scan on pp_lp2
-         Filter: (a = 1)
-(7 rows)
+(4 rows)
 
 explain (costs off) delete from pp_lp where a = 1;
         QUERY PLAN        
 --------------------------
  Delete on pp_lp
    Delete on pp_lp1
-   Delete on pp_lp2
    ->  Seq Scan on pp_lp1
          Filter: (a = 1)
-   ->  Seq Scan on pp_lp2
-         Filter: (a = 1)
-(7 rows)
+(4 rows)
 
 drop table pp_lp;
 -- Ensure enable_partition_prune does not affect non-partitioned tables.