1 files changed, 80 insertions, 0 deletions
diff --git a/src/test/regress/expected/write_parallel.out b/src/test/regress/expected/write_parallel.out
new file mode 100644
index 0000000..dc0c4ba
--- /dev/null
+++ b/src/test/regress/expected/write_parallel.out
@@ -0,0 +1,80 @@
+--
+-- PARALLEL
+--
+begin;
+-- encourage use of parallel plans
+set parallel_setup_cost=0;
+set parallel_tuple_cost=0;
+set min_parallel_table_scan_size=0;
+set max_parallel_workers_per_gather=4;
+--
+-- Test write operations that has an underlying query that is eligible
+-- for parallel plans
+--
+explain (costs off) create table parallel_write as
+    select length(stringu1) from tenk1 group by length(stringu1);
+                    QUERY PLAN                     
+---------------------------------------------------
+ Finalize HashAggregate
+   Group Key: (length((stringu1)::text))
+   ->  Gather
+         Workers Planned: 4
+         ->  Partial HashAggregate
+               Group Key: length((stringu1)::text)
+               ->  Parallel Seq Scan on tenk1
+(7 rows)
+
+create table parallel_write as
+    select length(stringu1) from tenk1 group by length(stringu1);
+drop table parallel_write;
+explain (costs off) select length(stringu1) into parallel_write
+    from tenk1 group by length(stringu1);
+                    QUERY PLAN                     
+---------------------------------------------------
+ Finalize HashAggregate
+   Group Key: (length((stringu1)::text))
+   ->  Gather
+         Workers Planned: 4
+         ->  Partial HashAggregate
+               Group Key: length((stringu1)::text)
+               ->  Parallel Seq Scan on tenk1
+(7 rows)
+
+select length(stringu1) into parallel_write
+    from tenk1 group by length(stringu1);
+drop table parallel_write;
+explain (costs off) create materialized view parallel_mat_view as
+    select length(stringu1) from tenk1 group by length(stringu1);
+                    QUERY PLAN                     
+---------------------------------------------------
+ Finalize HashAggregate
+   Group Key: (length((stringu1)::text))
+   ->  Gather
+         Workers Planned: 4
+         ->  Partial HashAggregate
+               Group Key: length((stringu1)::text)
+               ->  Parallel Seq Scan on tenk1
+(7 rows)
+
+create materialized view parallel_mat_view as
+    select length(stringu1) from tenk1 group by length(stringu1);
+create unique index on parallel_mat_view(length);
+refresh materialized view parallel_mat_view;
+refresh materialized view concurrently parallel_mat_view;
+drop materialized view parallel_mat_view;
+prepare prep_stmt as select length(stringu1) from tenk1 group by length(stringu1);
+explain (costs off) create table parallel_write as execute prep_stmt;
+                    QUERY PLAN                     
+---------------------------------------------------
+ Finalize HashAggregate
+   Group Key: (length((stringu1)::text))
+   ->  Gather
+         Workers Planned: 4
+         ->  Partial HashAggregate
+               Group Key: length((stringu1)::text)
+               ->  Parallel Seq Scan on tenk1
+(7 rows)
+
+create table parallel_write as execute prep_stmt;
+drop table parallel_write;
+rollback;