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Improve code coverage of select_parallel test.

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Make sure that rescans of parallel indexscans are tested.
Per code coverage report.
This commit is contained in:
Tom Lane 2017-08-31 13:15:54 -04:00
parent cb8e015b94
commit 4c7af96365
2 changed files with 75 additions and 0 deletions
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55
src/test/regress/expected/select_parallel.out
View File

@ -179,6 +179,61 @@ select count(*) from tenk1 where thousand > 95;
9040
(1 row)
-- test rescan cases too
set enable_material = false;
explain (costs off)
select * from
(select count(unique1) from tenk1 where hundred > 10) ss
right join (values (1),(2),(3)) v(x) on true;
QUERY PLAN
--------------------------------------------------------------------------
Nested Loop Left Join
-> Values Scan on "*VALUES*"
-> Finalize Aggregate
-> Gather
Workers Planned: 4
-> Partial Aggregate
-> Parallel Index Scan using tenk1_hundred on tenk1
Index Cond: (hundred > 10)
(8 rows)
select * from
(select count(unique1) from tenk1 where hundred > 10) ss
right join (values (1),(2),(3)) v(x) on true;
count | x
-------+---
8900 | 1
8900 | 2
8900 | 3
(3 rows)
explain (costs off)
select * from
(select count(*) from tenk1 where thousand > 99) ss
right join (values (1),(2),(3)) v(x) on true;
QUERY PLAN
--------------------------------------------------------------------------------------
Nested Loop Left Join
-> Values Scan on "*VALUES*"
-> Finalize Aggregate
-> Gather
Workers Planned: 4
-> Partial Aggregate
-> Parallel Index Only Scan using tenk1_thous_tenthous on tenk1
Index Cond: (thousand > 99)
(8 rows)
select * from
(select count(*) from tenk1 where thousand > 99) ss
right join (values (1),(2),(3)) v(x) on true;
count | x
-------+---
9000 | 1
9000 | 2
9000 | 3
(3 rows)
reset enable_material;
reset enable_seqscan;
reset enable_bitmapscan;
-- test parallel bitmap heap scan.

20
src/test/regress/sql/select_parallel.sql
View File

@ -65,6 +65,26 @@ explain (costs off)
select count(*) from tenk1 where thousand > 95;
select count(*) from tenk1 where thousand > 95;
-- test rescan cases too
set enable_material = false;
explain (costs off)
select * from
(select count(unique1) from tenk1 where hundred > 10) ss
right join (values (1),(2),(3)) v(x) on true;
select * from
(select count(unique1) from tenk1 where hundred > 10) ss
right join (values (1),(2),(3)) v(x) on true;
explain (costs off)
select * from
(select count(*) from tenk1 where thousand > 99) ss
right join (values (1),(2),(3)) v(x) on true;
select * from
(select count(*) from tenk1 where thousand > 99) ss
right join (values (1),(2),(3)) v(x) on true;
reset enable_material;
reset enable_seqscan;
reset enable_bitmapscan;