diff -U3 /home/postgres/pgsql/src/test/regress/expected/temp.out /home/postgres/pgsql/src/test/regress/results/temp.out
--- /home/postgres/pgsql/src/test/regress/expected/temp.out	2019-08-05 11:20:31.612729499 -0400
+++ /home/postgres/pgsql/src/test/regress/results/temp.out	2019-08-11 15:45:24.471393832 -0400
@@ -273,6 +273,36 @@
 (1 row)
 
 -- two relations remain in this case.
+explain
+select relname from pg_class where relname like 'temp_parted_oncommit_test%';
+                                           QUERY PLAN                                            
+-------------------------------------------------------------------------------------------------
+ Index Only Scan using pg_class_relname_nsp_index on pg_class  (cost=0.28..8.30 rows=1 width=64)
+   Index Cond: ((relname >= 'temp'::text) AND (relname < 'temq'::text))
+   Filter: (relname ~~ 'temp_parted_oncommit_test%'::text)
+(3 rows)
+
+set enable_indexonlyscan TO 0;
+explain
+select relname from pg_class where relname like 'temp_parted_oncommit_test%';
+                                         QUERY PLAN                                         
+--------------------------------------------------------------------------------------------
+ Index Scan using pg_class_relname_nsp_index on pg_class  (cost=0.28..8.30 rows=1 width=64)
+   Index Cond: ((relname >= 'temp'::text) AND (relname < 'temq'::text))
+   Filter: (relname ~~ 'temp_parted_oncommit_test%'::text)
+(3 rows)
+
+set enable_indexscan TO 0;
+explain
+select relname from pg_class where relname like 'temp_parted_oncommit_test%';
+                                       QUERY PLAN                                        
+-----------------------------------------------------------------------------------------
+ Bitmap Heap Scan on pg_class  (cost=4.29..8.30 rows=1 width=64)
+   Filter: (relname ~~ 'temp_parted_oncommit_test%'::text)
+   ->  Bitmap Index Scan on pg_class_relname_nsp_index  (cost=0.00..4.29 rows=1 width=0)
+         Index Cond: ((relname >= 'temp'::text) AND (relname < 'temq'::text))
+(4 rows)
+
 select relname from pg_class where relname like 'temp_parted_oncommit_test%';
           relname           
 ----------------------------
@@ -280,6 +310,8 @@
  temp_parted_oncommit_test1
 (2 rows)
 
+reset enable_indexscan;
+reset enable_indexonlyscan;
 drop table temp_parted_oncommit_test;
 -- Check dependencies between ON COMMIT actions with inheritance trees.
 -- Using ON COMMIT DROP on a parent removes the whole set.