citus/src/test/regress/sql/subquery_view.sql

467 lines
11 KiB
SQL

-- ===================================================================
-- test recursive planning functionality on views
-- ===================================================================
CREATE SCHEMA subquery_view;
SET search_path TO subquery_view, public;
SET citus.next_shard_id TO 1512000;
CREATE TABLE users_table_local AS SELECT * FROM users_table;
CREATE TABLE events_table_local AS SELECT * FROM events_table;
SET client_min_messages TO DEBUG1;
CREATE VIEW view_without_subquery AS
SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC;
SELECT
*
FROM
view_without_subquery
ORDER BY 1 DESC LIMIT 5;
CREATE VIEW view_without_subquery_second AS
SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC
LIMIT 5;
SELECT
*
FROM
view_without_subquery_second
ORDER BY 1;
-- subqueries in FROM clause with LIMIT should be recursively planned
CREATE VIEW subquery_limit AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_limit ORDER BY 1 DESC;
-- subqueries in FROM clause with GROUP BY non-distribution column should be recursively planned
CREATE VIEW subquery_non_p_key_group_by AS
SELECT
*
FROM
(SELECT
DISTINCT users_table.value_1
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1
) as foo
ORDER BY 1 DESC;
SELECT * FROM subquery_non_p_key_group_by ORDER BY 1 DESC;
CREATE VIEW final_query_router AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.value_3
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
GROUP BY users_table.value_3
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.value_3
ORDER BY 2 DESC, 1;
SELECT * FROM final_query_router ORDER BY 1;
CREATE VIEW final_query_realtime AS
SELECT
*
FROM
(SELECT
users_table.value_2
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
GROUP BY users_table.value_2
ORDER BY 1 DESC
) as foo,
(SELECT
users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (5,6,7,8)
ORDER BY 1 DESC
) as bar
WHERE foo.value_2 = bar.user_id
ORDER BY 2 DESC, 1 DESC
LIMIT 3;
SELECT
DISTINCT ON (users_table.value_2) users_table.value_2, time, value_3
FROM
final_query_realtime, users_table
WHERE
users_table.user_id = final_query_realtime.user_id
ORDER BY 1 DESC, 2 DESC, 3 DESC
LIMIT 3;
CREATE VIEW subquery_in_where AS
SELECT DISTINCT user_id
FROM users_table
WHERE
user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5);
SELECT
*
FROM
subquery_in_where
ORDER BY 1 DESC;
-- subquery in FROM -> FROM -> WHERE should be replaced due to LIMIT
CREATE VIEW subquery_from_from_where AS
SELECT user_id, array_length(events_table, 1)
FROM (
SELECT user_id, array_agg(event ORDER BY time) AS events_table
FROM (
SELECT
u.user_id, e.event_type::text AS event, e.time
FROM
users_table AS u,
events_table AS e
WHERE u.user_id = e.user_id AND
u.user_id IN
(
SELECT
user_id
FROM
users_table
WHERE value_2 >= 5
AND EXISTS (SELECT user_id FROM events_table WHERE event_type > 1 AND event_type <= 3 AND value_3 > 1 AND user_id = users_table.user_id)
AND NOT EXISTS (SELECT user_id FROM events_table WHERE event_type > 3 AND event_type <= 4 AND value_3 > 1 AND user_id = users_table.user_id)
LIMIT 5
)
) t
GROUP BY user_id
) q;
SELECT
*
FROM
subquery_from_from_where
ORDER BY
2 DESC, 1;
-- subquery in FROM -> FROM -> FROM should be replaced if
-- it contains onle local tables
CREATE VIEW subquery_from_from_where_local_table AS
SELECT
DISTINCT user_id
FROM
(
SELECT users_table.user_id FROM users_table,
(
SELECT
event_type, user_id
FROM
(SELECT event_type, users_table.user_id FROM users_table,
(SELECT user_id, event_type FROM events_table_local WHERE value_2 < 3 OFFSET 3) as foo
WHERE foo.user_id = users_table.user_id
) bar
) as baz
WHERE baz.user_id = users_table.user_id
) as sub1;
SELECT
*
FROM
subquery_from_from_where
ORDER BY 1 DESC
LIMIT 3;
SET citus.enable_repartition_joins to ON;
CREATE VIEW repartition_view AS
SELECT
count(*)
FROM
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) as foo,
(
SELECT user_id FROM users_table
) as bar
WHERE foo.value_2 = bar.user_id;
SELECT
*
FROM
repartition_view;
CREATE VIEW all_executors_view AS
SELECT
count(*)
FROM
(
SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
) as foo,
(
SELECT user_id FROM users_table OFFSET 0
) as bar,
(
SELECT DISTINCT users_table.value_2 FROM users_table, events_table WHERE users_table.user_id = events_table.value_2 AND users_table.user_id < 2
) baz,
(
SELECT user_id FROM users_table_local WHERE user_id = 2
) baw
WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
SELECT
*
FROM
all_executors_view;
SET citus.enable_repartition_joins to OFF;
-- the same query, but this time the CTEs also live inside a subquery
CREATE VIEW subquery_and_ctes AS
SELECT
*
FROM
(
WITH cte AS (
WITH local_cte AS (
SELECT * FROM users_table_local
),
dist_cte AS (
SELECT
user_id
FROM
events_table,
(SELECT DISTINCT value_2 FROM users_table OFFSET 0) as foo
WHERE
events_table.user_id = foo.value_2 AND
events_table.user_id IN (SELECT DISTINCT value_1 FROM users_table ORDER BY 1 LIMIT 3)
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT
count(*) as cnt
FROM
cte,
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
WHERE foo.user_id = cte.user_id
) as foo, users_table WHERE foo.cnt > users_table.value_2;
SELECT * FROM subquery_and_ctes
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
LIMIT 5;
CREATE VIEW subquery_and_ctes_second AS
SELECT time, event_type, value_2, value_3 FROM
(
WITH cte AS MATERIALIZED (
WITH local_cte AS MATERIALIZED (
SELECT * FROM users_table_local
),
dist_cte AS MATERIALIZED (
SELECT user_id FROM events_table
)
SELECT dist_cte.user_id FROM local_cte join dist_cte on dist_cte.user_id=local_cte.user_id
)
SELECT DISTINCT cte.user_id
FROM users_table, cte
WHERE
users_table.user_id = cte.user_id AND
users_table.user_id IN
(WITH cte_in_where AS (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5) SELECT * FROM cte_in_where)
ORDER BY 1 DESC
) as foo,
events_table
WHERE
foo.user_id = events_table.value_2;
SELECT * FROM subquery_and_ctes_second
ORDER BY 3 DESC, 2 DESC, 1 DESC
LIMIT 5;
CREATE VIEW deep_subquery AS
SELECT count(*)
FROM
(
SELECT avg(min) FROM
(
SELECT min(users_table.value_1) FROM
(
SELECT avg(event_type) as avg_ev_type FROM
(
SELECT
max(value_1) as mx_val_1
FROM (
SELECT
avg(event_type) as avg
FROM
(
SELECT
cnt
FROM
(SELECT count(*) as cnt, value_2 FROM users_table GROUP BY value_2) as level_1, users_table
WHERE
users_table.user_id = level_1.cnt
) as level_2, events_table
WHERE events_table.user_id = level_2.cnt
GROUP BY level_2.cnt
) as level_3, users_table
WHERE user_id = level_3.avg
GROUP BY level_3.avg
) as level_4, events_table
WHERE level_4.mx_val_1 = events_table.user_id
GROUP BY level_4.mx_val_1
) as level_5, users_table
WHERE
level_5.avg_ev_type = users_table.user_id
GROUP BY
level_5.avg_ev_type
) as level_6, users_table WHERE users_table.user_id = level_6.min
GROUP BY users_table.value_1
) as bar;
SELECT
*
FROM
deep_subquery;
CREATE VIEW result_of_view_is_also_recursively_planned AS
SELECT
user_id
FROM
(SELECT
DISTINCT users_table.user_id
FROM
users_table, events_table
WHERE
users_table.user_id = events_table.user_id AND
event_type IN (1,2,3,4)
ORDER BY 1 DESC LIMIT 5
) as foo
ORDER BY 1 DESC;
SELECT
*
FROM
(SELECT
*
FROM
result_of_view_is_also_recursively_planned, events_table
WHERE
events_table.value_2 = result_of_view_is_also_recursively_planned.user_id
ORDER BY time DESC
LIMIT 5
OFFSET 4
) as foo
ORDER BY time DESC LIMIT 5;
SET client_min_messages TO DEFAULT;
CREATE TABLE reference_table (text_col text, int_col int);
SELECT create_reference_table('reference_table');
SELECT public.coordinator_plan_with_subplans($Q$
EXPLAIN (COSTS OFF) WITH cte AS (
SELECT application_name AS text_col
FROM pg_stat_activity
) SELECT * FROM reference_table JOIN cte USING (text_col);
$Q$);
CREATE TABLE dist_table(text_col text, int_col int);
SELECT create_distributed_table('dist_table', 'text_col');
SELECT public.coordinator_plan_with_subplans($Q$
EXPLAIN (COSTS OFF) WITH cte AS (
SELECT application_name AS text_col
FROM pg_stat_activity
) SELECT * FROM dist_table JOIN cte USING (text_col);
$Q$);
CREATE OR REPLACE VIEW view_on_views AS SELECT pg_stat_activity.application_name, pg_locks.pid FROM pg_stat_activity, pg_locks;
SELECT public.coordinator_plan_with_subplans($Q$
EXPLAIN (COSTS OFF) WITH cte AS (
SELECT application_name AS text_col
FROM view_on_views
) SELECT * FROM reference_table JOIN cte USING (text_col);
$Q$);
SELECT public.coordinator_plan_with_subplans($Q$
EXPLAIN (COSTS OFF) WITH cte AS (
SELECT application_name AS text_col
FROM view_on_views
) SELECT * FROM dist_table JOIN cte USING (text_col);
$Q$);
SET client_min_messages TO WARNING;
DROP SCHEMA subquery_view CASCADE;
SET search_path TO public;