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Add minimal regression test for blessed record type transfer.

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Test that blessed records can be transferred through a TupleQueue and
correctly decoded by another backend.  While touching the file, make
sure that force_parallel_mode settings only cover relevant tests.

Author: Thomas Munro, editorialized by Andres Freund
Reviewed-By: Andres Freund
Discussion: https://postgr.es/m/20170823054644.efuzftxjpfi6wwqs%40alap3.anarazel.de
This commit is contained in:
Andres Freund 2017-08-24 17:42:49 -07:00
parent d7694fc148
commit d36f7efb39
2 changed files with 66 additions and 3 deletions
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38
src/test/regress/expected/select_parallel.out
View File

@ -326,7 +326,8 @@ select string4 from tenk1 order by string4 limit 5;
reset max_parallel_workers;
reset enable_hashagg;
set force_parallel_mode=1;
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
explain (costs off)
select stringu1::int2 from tenk1 where unique1 = 1;
QUERY PLAN
@ -338,7 +339,38 @@ explain (costs off)
Index Cond: (unique1 = 1)
(5 rows)
ROLLBACK TO SAVEPOINT settings;
-- exercise record typmod remapping between backends
CREATE OR REPLACE FUNCTION make_record(n int)
RETURNS RECORD LANGUAGE plpgsql PARALLEL SAFE AS
$$
BEGIN
RETURN CASE n
WHEN 1 THEN ROW(1)
WHEN 2 THEN ROW(1, 2)
WHEN 3 THEN ROW(1, 2, 3)
WHEN 4 THEN ROW(1, 2, 3, 4)
ELSE ROW(1, 2, 3, 4, 5)
END;
END;
$$;
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
SELECT make_record(x) FROM (SELECT generate_series(1, 5) x) ss ORDER BY x;
make_record
-------------
(1)
(1,2)
(1,2,3)
(1,2,3,4)
(1,2,3,4,5)
(5 rows)
ROLLBACK TO SAVEPOINT settings;
DROP function make_record(n int);
-- to increase the parallel query test coverage
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
EXPLAIN (analyze, timing off, summary off, costs off) SELECT * FROM tenk1;
QUERY PLAN
-------------------------------------------------------------
@ -348,8 +380,12 @@ EXPLAIN (analyze, timing off, summary off, costs off) SELECT * FROM tenk1;
-> Parallel Seq Scan on tenk1 (actual rows=2000 loops=5)
(4 rows)
ROLLBACK TO SAVEPOINT settings;
-- provoke error in worker
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
select stringu1::int2 from tenk1 where unique1 = 1;
ERROR: invalid input syntax for integer: "BAAAAA"
CONTEXT: parallel worker
ROLLBACK TO SAVEPOINT settings;
rollback;

31
src/test/regress/sql/select_parallel.sql
View File

@ -126,15 +126,42 @@ select string4 from tenk1 order by string4 limit 5;
reset max_parallel_workers;
reset enable_hashagg;
set force_parallel_mode=1;
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
explain (costs off)
select stringu1::int2 from tenk1 where unique1 = 1;
ROLLBACK TO SAVEPOINT settings;
-- exercise record typmod remapping between backends
CREATE OR REPLACE FUNCTION make_record(n int)
RETURNS RECORD LANGUAGE plpgsql PARALLEL SAFE AS
$$
BEGIN
RETURN CASE n
WHEN 1 THEN ROW(1)
WHEN 2 THEN ROW(1, 2)
WHEN 3 THEN ROW(1, 2, 3)
WHEN 4 THEN ROW(1, 2, 3, 4)
ELSE ROW(1, 2, 3, 4, 5)
END;
END;
$$;
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
SELECT make_record(x) FROM (SELECT generate_series(1, 5) x) ss ORDER BY x;
ROLLBACK TO SAVEPOINT settings;
DROP function make_record(n int);
-- to increase the parallel query test coverage
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
EXPLAIN (analyze, timing off, summary off, costs off) SELECT * FROM tenk1;
ROLLBACK TO SAVEPOINT settings;
-- provoke error in worker
SAVEPOINT settings;
SET LOCAL force_parallel_mode = 1;
select stringu1::int2 from tenk1 where unique1 = 1;
ROLLBACK TO SAVEPOINT settings;
rollback;