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Add regression test for 04ae11f62e643e07c411c4935ea6af46cb112aa9.

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The code in this area needs further revision, and it would be best
not to re-break the things we've already fixed.

Per a gripe from Tom Lane.
This commit is contained in:
Robert Haas 2016-06-16 12:00:55 -04:00
parent 9901d8ac2e
commit 8c1d9d56e9
2 changed files with 66 additions and 0 deletions
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48
src/test/regress/expected/select_parallel.out
View File

@ -1,12 +1,21 @@
--
-- PARALLEL
--
create or replace function parallel_restricted(int) returns int as $$
begin
perform * from pg_stat_activity where client_port is null;
if (found) then
raise 'parallel restricted function run in worker';
end if;
return $1;
end$$ language plpgsql parallel restricted;
-- Serializable isolation would disable parallel query, so explicitly use an
-- arbitrary other level.
begin isolation level repeatable read;
-- setup parallel test
set parallel_setup_cost=0;
set parallel_tuple_cost=0;
set max_parallel_workers_per_gather=4;
explain (costs off)
select count(*) from a_star;
QUERY PLAN
@ -30,6 +39,45 @@ select count(*) from a_star;
50
(1 row)
-- test that parallel_restricted function doesn't run in worker
alter table tenk1 set (parallel_workers = 4);
explain (verbose, costs off)
select parallel_restricted(unique1) from tenk1
where stringu1 = 'GRAAAA' order by 1;
QUERY PLAN
---------------------------------------------------------
Sort
Output: (parallel_restricted(unique1))
Sort Key: (parallel_restricted(tenk1.unique1))
-> Gather
Output: parallel_restricted(unique1)
Workers Planned: 4
-> Parallel Seq Scan on public.tenk1
Output: unique1
Filter: (tenk1.stringu1 = 'GRAAAA'::name)
(9 rows)
select parallel_restricted(unique1) from tenk1
where stringu1 = 'GRAAAA' order by 1;
parallel_restricted
---------------------
448
1124
1800
2476
3152
3828
4504
5180
5856
6532
7208
7884
8560
9236
9912
(15 rows)
set force_parallel_mode=1;
explain (costs off)
select stringu1::int2 from tenk1 where unique1 = 1;

18
src/test/regress/sql/select_parallel.sql
View File

@ -2,6 +2,15 @@
-- PARALLEL
--
create or replace function parallel_restricted(int) returns int as $$
begin
perform * from pg_stat_activity where client_port is null;
if (found) then
raise 'parallel restricted function run in worker';
end if;
return $1;
end$$ language plpgsql parallel restricted;
-- Serializable isolation would disable parallel query, so explicitly use an
-- arbitrary other level.
begin isolation level repeatable read;
@ -9,11 +18,20 @@ begin isolation level repeatable read;
-- setup parallel test
set parallel_setup_cost=0;
set parallel_tuple_cost=0;
set max_parallel_workers_per_gather=4;
explain (costs off)
select count(*) from a_star;
select count(*) from a_star;
-- test that parallel_restricted function doesn't run in worker
alter table tenk1 set (parallel_workers = 4);
explain (verbose, costs off)
select parallel_restricted(unique1) from tenk1
where stringu1 = 'GRAAAA' order by 1;
select parallel_restricted(unique1) from tenk1
where stringu1 = 'GRAAAA' order by 1;
set force_parallel_mode=1;
explain (costs off)