diff -U3 /home/pgbf/buildroot/HEAD/pgsql.build/src/test/regress/expected/partition_prune.out /home/pgbf/buildroot/HEAD/pgsql.build/src/test/regress/results/partition_prune.out
--- /home/pgbf/buildroot/HEAD/pgsql.build/src/test/regress/expected/partition_prune.out	Thu Dec 12 00:40:04 2019
+++ /home/pgbf/buildroot/HEAD/pgsql.build/src/test/regress/results/partition_prune.out	Thu Dec 12 00:45:44 2019
@@ -3169,10 +3169,12 @@
 --------------------------------------------
  Limit (actual rows=0 loops=1)
    Output: ma_test.a, ma_test.b
+   Worker 0: actual rows=0 loops=1
    ->  Merge Append (actual rows=0 loops=1)
          Sort Key: ma_test.b
+         Worker 0: actual rows=0 loops=1
          Subplans Removed: 3
-(5 rows)
+(7 rows)
 
 deallocate mt_q2;
 reset plan_cache_mode;