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Add test for compress_chunk plan invalidation

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This patch adds a testcase for prepared statement plan invalidation
when a chunk gets compressed.
This commit is contained in:
Sven Klemm 2019-08-21 14:41:22 +02:00 committed by Matvey Arye
parent ea7d2c7e60
commit 45fac0ebe6
2 changed files with 84 additions and 2 deletions

60
tsl/test/expected/compression.out

@ -289,10 +289,68 @@ where hypertable_name::text like 'conditions';
--make sure compressed_chunk_id is reset to NULL
select ch1.compressed_chunk_id IS NULL
FROM _timescaledb_catalog.chunk ch1, _timescaledb_catalog.hypertable ht where ch1.hypertable_id = ht.id and ht.table_name like 'conditions'
FROM _timescaledb_catalog.chunk ch1, _timescaledb_catalog.hypertable ht where ch1.hypertable_id = ht.id and ht.table_name like 'conditions';
?column?
----------
t
t
(2 rows)
-- test plans get invalidated when chunks get compressed
SET timescaledb.enable_transparent_decompression TO ON;
CREATE TABLE plan_inval(time timestamptz, device_id int);
SELECT create_hypertable('plan_inval','time');
NOTICE: adding not-null constraint to column "time"
create_hypertable
-------------------------
(5,public,plan_inval,t)
(1 row)
ALTER TABLE plan_inval SET (timescaledb.compress,timescaledb.compress_orderby='time desc');
-- create 2 chunks
INSERT INTO plan_inval SELECT * FROM (VALUES ('2000-01-01'::timestamptz,1), ('2000-01-07'::timestamptz,1)) v(time,device_id);
SET max_parallel_workers_per_gather to 0;
PREPARE prep_plan AS SELECT count(*) FROM plan_inval;
EXECUTE prep_plan;
count
-------
2
(1 row)
EXECUTE prep_plan;
count
-------
2
(1 row)
EXECUTE prep_plan;
count
-------
2
(1 row)
-- get name of first chunk
SELECT tableoid::regclass AS "CHUNK_NAME" FROM plan_inval ORDER BY time LIMIT 1
\gset
SELECT compress_chunk(:'CHUNK_NAME');
compress_chunk
----------------
(1 row)
EXECUTE prep_plan;
count
-------
2
(1 row)
EXPLAIN (COSTS OFF) EXECUTE prep_plan;
QUERY PLAN
----------------------------------------------------------------
Aggregate
-> Append
-> Custom Scan (DecompressChunk) on _hyper_5_11_chunk
-> Seq Scan on compress_hyper_6_13_chunk
-> Seq Scan on _hyper_5_12_chunk
(5 rows)

26
tsl/test/sql/compression.sql

@ -114,4 +114,28 @@ where hypertable_name::text like 'conditions';
--make sure compressed_chunk_id is reset to NULL
select ch1.compressed_chunk_id IS NULL
FROM _timescaledb_catalog.chunk ch1, _timescaledb_catalog.hypertable ht where ch1.hypertable_id = ht.id and ht.table_name like 'conditions'
FROM _timescaledb_catalog.chunk ch1, _timescaledb_catalog.hypertable ht where ch1.hypertable_id = ht.id and ht.table_name like 'conditions';
-- test plans get invalidated when chunks get compressed
SET timescaledb.enable_transparent_decompression TO ON;
CREATE TABLE plan_inval(time timestamptz, device_id int);
SELECT create_hypertable('plan_inval','time');
ALTER TABLE plan_inval SET (timescaledb.compress,timescaledb.compress_orderby='time desc');
-- create 2 chunks
INSERT INTO plan_inval SELECT * FROM (VALUES ('2000-01-01'::timestamptz,1), ('2000-01-07'::timestamptz,1)) v(time,device_id);
SET max_parallel_workers_per_gather to 0;
PREPARE prep_plan AS SELECT count(*) FROM plan_inval;
EXECUTE prep_plan;
EXECUTE prep_plan;
EXECUTE prep_plan;
-- get name of first chunk
SELECT tableoid::regclass AS "CHUNK_NAME" FROM plan_inval ORDER BY time LIMIT 1
\gset
SELECT compress_chunk(:'CHUNK_NAME');
EXECUTE prep_plan;
EXPLAIN (COSTS OFF) EXECUTE prep_plan;