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--
-- multi subquery complex queries aims to expand existing subquery pushdown
-- regression tests to cover more caeses
-- the tables that are used depends to multi_insert_select_behavioral_analytics_create_table.sql
--
-- We don't need shard id sequence here, so commented out to prevent conflicts with concurrent tests
-- ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 1400000;
ALTER SEQUENCE pg_catalog.pg_dist_jobid_seq RESTART 1400000;
SET citus.subquery_pushdown TO TRUE;
SET citus.enable_router_execution TO FALSE;
--
-- NOT SUPPORTED YET BUT SHOULD BE ADDED
--
--SELECT ("final_query"."event_types") as types, count(*) AS sumOfEventType
--FROM
-- ( SELECT *, random()
-- FROM
-- ( SELECT "t"."user_id",
-- "t"."time",
-- unnest("t"."collected_events") AS "event_types"
-- FROM
-- ( SELECT "t1"."user_id",
-- min("t1"."time") AS "time",
-- array_agg(("t1"."event")
-- ORDER BY time ASC, event DESC) AS collected_events
-- FROM (
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id",
-- "events"."time",
-- 0 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (10, 11, 12, 13, 14, 15) ) events_subquery_1)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 1 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (15, 16, 17, 18, 19) ) events_subquery_2)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 2 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (20, 21, 22, 23, 24, 25) ) events_subquery_3)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 3 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (26, 27, 28, 29, 30, 13)) events_subquery_4)) t1
-- GROUP BY "t1"."user_id") AS t) "q"
--INNER JOIN
-- (SELECT "users"."user_id"
-- FROM users_table as "users"
-- WHERE value_1 > 50 and value_1 < 70) AS t ON (t.user_id = q.user_id)) as final_query
--GROUP BY types
--ORDER BY types;
--
-- NOT SUPPORTED YET BUT SHOULD BE ADDED
--
--SELECT user_id, count(*) as cnt
--FROM
-- (SELECT first_query.user_id,
-- Random()
-- FROM
-- ( SELECT "t"."user_id",
-- "t"."time",
-- unnest("t"."collected_events") AS "event_types"
-- FROM
-- ( SELECT "t1"."user_id",
-- min("t1"."time") AS "time",
-- array_agg(("t1"."event")
-- ORDER BY time ASC, event DESC) AS collected_events
-- FROM (
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id",
-- "events"."time",
-- 0 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (10, 11, 12, 13, 14, 15) ) events_subquery_1)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 1 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (15, 16, 17, 18, 19) ) events_subquery_2)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 2 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (20, 21, 22, 23, 24, 25) ) events_subquery_3)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 3 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (26, 27, 28, 29, 30, 13)) events_subquery_4)) t1
-- GROUP BY "t1"."user_id") AS t) "first_query"
--INNER JOIN
-- (SELECT "t"."user_id"
-- FROM
-- (SELECT "users"."user_id"
-- FROM users_table as "users"
-- WHERE value_1 > 50 and value_1 < 70) AS t
-- left OUTER JOIN
-- (SELECT DISTINCT("events"."user_id")
-- FROM events_table as "events"
-- WHERE event_type IN (26, 27, 28, 29, 30, 13)
-- GROUP BY "events"."user_id") as t2 on t2.user_id = t.user_id ) as second_query
-- ON ("first_query".user_id = "second_query".user_id)) as final_query
--GROUP BY user_id ORDER BY cnt DESC, user_id DESC LIMIT 10;
--
-- NOT SUPPORTED YET BUT SHOULD BE ADDED
--
--SELECT user_id, count(*) as cnt
--FROM
-- (SELECT first_query.user_id,
-- Random()
-- FROM
-- ( SELECT "t"."user_id",
-- "t"."time",
-- unnest("t"."collected_events") AS "event_types"
-- FROM
-- ( SELECT "t1"."user_id",
-- min("t1"."time") AS "time",
-- array_agg(("t1"."event")
-- ORDER BY time ASC, event DESC) AS collected_events
-- FROM (
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id",
-- "events"."time",
-- 0 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (10, 11, 12, 13, 14, 15) ) events_subquery_1)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 1 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (15, 16, 17, 18, 19) ) events_subquery_2)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 2 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (20, 21, 22, 23, 24, 25) ) events_subquery_3)
-- UNION
-- (SELECT *
-- FROM
-- (SELECT "events"."user_id", "events"."time", 3 AS event
-- FROM events_table as "events"
-- WHERE event_type IN (26, 27, 28, 29, 30, 13)) events_subquery_4)) t1
-- GROUP BY "t1"."user_id") AS t) "first_query"
--INNER JOIN
-- (SELECT "t"."user_id"
-- FROM
-- (SELECT "users"."user_id"
-- FROM users_table as "users"
-- WHERE value_1 > 50 and value_1 < 70) AS t
-- left OUTER JOIN
-- (SELECT DISTINCT("events"."user_id")
-- FROM events_table as "events"
-- WHERE event_type IN (26, 27, 28, 29, 30, 13)
-- GROUP BY "events"."user_id") as t2 on t2.user_id = t.user_id ) as second_query
-- ON ("first_query".user_id = "second_query".user_id)) as final_query
--GROUP BY user_id ORDER BY cnt DESC, user_id DESC LIMIT 10;
-- Simple LATERAL JOINs with GROUP BYs in each side
SELECT *
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT user_id,
Max(time) AS lastseen
FROM
(SELECT user_id,
time
FROM
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40) "events_1"
ORDER BY time DESC
LIMIT 1000) "recent_events_1"
GROUP BY user_id
ORDER BY max(time) DESC) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 50 and users.value_2 < 55
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 50) "some_users"
order BY user_id
limit 50;
-- same query with subuqery joins in topmost select
SELECT "some_users_data".user_id, lastseen
FROM
(SELECT user_id,
Max(TIME) AS lastseen
FROM
(SELECT user_id,
TIME
FROM
(SELECT user_id,
TIME
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40) "events_1"
ORDER BY TIME DESC
LIMIT 1000) "recent_events_1"
GROUP BY user_id
ORDER BY max(TIME) DESC) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 50 and users.value_2 < 55
LIMIT 1) "some_users_data" ON TRUE
ORDER BY user_id
limit 50;
-- not supported since JOIN is not on the partition key
SELECT *
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT user_id,
Max(time) AS lastseen
FROM
(SELECT user_id,
time
FROM
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40) "events_1"
ORDER BY time DESC
LIMIT 1000) "recent_events_1"
GROUP BY user_id
ORDER BY max(time) DESC) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."value_1" = "some_recent_users"."user_id"
AND users.value_2 > 50 and users.value_2 < 55
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 50) "some_users"
order BY user_id
limit 50;
-- not supported since JOIN is not on the partition key
-- see (2 * user_id as user_id) target list element
SELECT *
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT 2 * user_id as user_id,
(time) AS lastseen
FROM
(SELECT user_id,
time
FROM
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40) "events_1"
ORDER BY time DESC
LIMIT 1000) "recent_events_1"
) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 50 and users.value_2 < 55
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 50) "some_users"
order BY user_id
limit 50;
-- LATERAL JOINs used with INNER JOINs
SELECT user_id, lastseen
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT filter_users_1.user_id,
time AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id = "user_where_1_join_1".user_id)) filter_users_1
JOIN LATERAL
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id = filter_users_1.user_id
ORDER BY time DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY time DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 10) "some_users"
order BY user_id DESC
limit 10;
--
-- A similar query with topmost select is dropped
-- and replaced by aggregation. Notice the heavy use of limit
--
SELECT "some_users_data".user_id, MAX(lastseen), count(*)
FROM
(SELECT filter_users_1.user_id,
TIME AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id = "user_where_1_join_1".user_id)) filter_users_1
JOIN LATERAL
(SELECT user_id,
TIME
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id = filter_users_1.user_id
ORDER BY TIME DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY TIME DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
GROUP BY 1
ORDER BY 2, 1 DESC
limit 10;
-- not supported since the inner JOIN is not equi join
SELECT user_id, lastseen
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT filter_users_1.user_id,
time AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id != "user_where_1_join_1".user_id)) filter_users_1
JOIN LATERAL
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id = filter_users_1.user_id
ORDER BY time DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY time DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 10) "some_users"
order BY user_id DESC
limit 10;
-- not supported since the inner JOIN is not on the partition key
SELECT user_id, lastseen
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT filter_users_1.user_id,
time AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id", "users"."value_1"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id = "user_where_1_join_1".value_1)) filter_users_1
JOIN LATERAL
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id = filter_users_1.user_id
ORDER BY time DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY time DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 10) "some_users"
order BY user_id DESC
limit 10;
-- not supported since upper LATERAL JOIN is not equi join
SELECT user_id, lastseen
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT filter_users_1.user_id,
time AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id", "users"."value_1"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id = "user_where_1_join_1".user_id)) filter_users_1
JOIN LATERAL
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id != filter_users_1.user_id
ORDER BY time DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY time DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 10) "some_users"
order BY user_id DESC
limit 10;
-- not supported since lower LATERAL JOIN is not on the partition key
SELECT user_id, lastseen
FROM
(SELECT "some_users_data".user_id, lastseen
FROM
(SELECT filter_users_1.user_id,
time AS lastseen
FROM
(SELECT user_where_1_1.user_id
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_1 > 20) user_where_1_1
INNER JOIN
(SELECT "users"."user_id", "users"."value_1"
FROM users_table as "users"
WHERE user_id > 12 and user_id < 16 and value_2 > 60) user_where_1_join_1
ON ("user_where_1_1".user_id = "user_where_1_join_1".user_id)) filter_users_1
JOIN LATERAL
(SELECT user_id,
time
FROM events_table as "events"
WHERE user_id > 12 and user_id < 16 and user_id = filter_users_1.user_id
ORDER BY time DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY time DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."value_1" = "some_recent_users"."user_id"
AND "users"."value_2" > 70
LIMIT 1) "some_users_data" ON TRUE
ORDER BY lastseen DESC
LIMIT 10) "some_users"
order BY user_id DESC
limit 10;
-- NESTED INNER JOINs
SELECT
count(*) AS value, "generated_group_field"
FROM
(SELECT DISTINCT "pushedDownQuery"."real_user_id", "generated_group_field"
FROM
(SELECT "eventQuery"."real_user_id", "eventQuery"."time", random(), ("eventQuery"."value_2") AS "generated_group_field"
FROM
(SELECT *
FROM
(SELECT "events"."time", "events"."user_id", "events"."value_2"
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40 and event_type IN (40, 41, 42, 43, 44, 45) ) "temp_data_queries"
inner JOIN
(SELECT
user_where_1_1.real_user_id
FROM
(SELECT "users"."user_id" as real_user_id
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 50 ) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_3 > 50 ) user_where_1_join_1
ON ("user_where_1_1".real_user_id = "user_where_1_join_1".user_id)) "user_filters_1"
ON ("temp_data_queries".user_id = "user_filters_1".real_user_id)) "eventQuery") "pushedDownQuery") "pushedDownQuery"
GROUP BY "generated_group_field" ORDER BY generated_group_field DESC, value DESC;
-- not supported since the first inner join is not on the partition key
SELECT
count(*) AS value, "generated_group_field"
FROM
(SELECT DISTINCT "pushedDownQuery"."real_user_id", "generated_group_field"
FROM
(SELECT "eventQuery"."real_user_id", "eventQuery"."time", random(), ("eventQuery"."value_2") AS "generated_group_field"
FROM
(SELECT *
FROM
(SELECT "events"."time", "events"."user_id", "events"."value_2"
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40 and event_type IN (40, 41, 42, 43, 44, 45) ) "temp_data_queries"
inner JOIN
(SELECT
user_where_1_1.real_user_id
FROM
(SELECT "users"."user_id" as real_user_id
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 50 ) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_3 > 50 ) user_where_1_join_1
ON ("user_where_1_1".real_user_id = "user_where_1_join_1".user_id)) "user_filters_1"
ON ("temp_data_queries".value_2 = "user_filters_1".real_user_id)) "eventQuery") "pushedDownQuery") "pushedDownQuery"
GROUP BY "generated_group_field" ORDER BY generated_group_field DESC, value DESC;
-- not supported since the first inner join is not an equi join
SELECT
count(*) AS value, "generated_group_field"
FROM
(SELECT DISTINCT "pushedDownQuery"."real_user_id", "generated_group_field"
FROM
(SELECT "eventQuery"."real_user_id", "eventQuery"."time", random(), ("eventQuery"."value_2") AS "generated_group_field"
FROM
(SELECT *
FROM
(SELECT "events"."time", "events"."user_id", "events"."value_2"
FROM events_table as "events"
WHERE user_id > 10 and user_id < 40 and event_type IN (40, 41, 42, 43, 44, 45) ) "temp_data_queries"
inner JOIN
(SELECT
user_where_1_1.real_user_id
FROM
(SELECT "users"."user_id" as real_user_id
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 50 ) user_where_1_1
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_3 > 50 ) user_where_1_join_1
ON ("user_where_1_1".real_user_id >= "user_where_1_join_1".user_id)) "user_filters_1"
ON ("temp_data_queries".user_id = "user_filters_1".real_user_id)) "eventQuery") "pushedDownQuery") "pushedDownQuery"
GROUP BY "generated_group_field" ORDER BY generated_group_field DESC, value DESC;
-- single level inner joins
SELECT
"value_3", count(*) AS cnt
FROM
(SELECT "value_3", "user_id", random()
FROM
(SELECT users_in_segment_1.user_id, value_3
FROM
(SELECT user_id, value_3 * 2 as value_3
FROM
(SELECT user_id, value_3
FROM
(SELECT "users"."user_id", value_3
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 30
) simple_user_where_1
) all_buckets_1
) users_in_segment_1
JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 60
) some_users_data
ON ("users_in_segment_1".user_id = "some_users_data".user_id)
) segmentalias_1) "tempQuery"
GROUP BY "value_3"
ORDER BY cnt, value_3 DESC LIMIT 10;
-- not supported since there is no partition column equality at all
SELECT
"value_3", count(*) AS cnt
FROM
(SELECT "value_3", "user_id", random()
FROM
(SELECT users_in_segment_1.user_id, value_3
FROM
(SELECT user_id, value_3 * 2 as value_3
FROM
(SELECT user_id, value_3
FROM
(SELECT "users"."user_id", value_3
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 30) simple_user_where_1) all_buckets_1) users_in_segment_1
JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 10 and user_id < 40 and value_2 > 60) some_users_data
ON (true)) segmentalias_1) "tempQuery"
GROUP BY "value_3" ORDER BY cnt, value_3 DESC LIMIT 10;
-- nested LATERAL JOINs
SELECT *
FROM
(SELECT "some_users_data".user_id,
"some_recent_users".value_3
FROM
(SELECT filter_users_1.user_id,
value_3
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 20 and user_id < 70 and users.value_2 = 200) filter_users_1
JOIN LATERAL
(SELECT user_id,
value_3
FROM events_table as "events"
WHERE user_id > 20 and user_id < 70
AND ("events".user_id = "filter_users_1".user_id)
ORDER BY value_3 DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY value_3 DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 200
LIMIT 1) "some_users_data" ON TRUE
ORDER BY value_3 DESC
LIMIT 10) "some_users"
order BY
value_3 DESC
limit 10;
-- nested lateral join at top most level
SELECT "some_users_data".user_id, "some_recent_users".value_3
FROM
(SELECT filter_users_1.user_id, value_3
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 20 and user_id < 70 and users.value_2 = 200
) filter_users_1
JOIN LATERAL
(SELECT user_id, value_3
FROM events_table as "events"
WHERE user_id > 20 and user_id < 70
AND ("events".user_id = "filter_users_1".user_id)
ORDER BY value_3 DESC
LIMIT 1
) "last_events_1" ON TRUE
ORDER BY value_3 DESC
LIMIT 10
) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 200
LIMIT 1
) "some_users_data" ON TRUE
ORDER BY value_3 DESC, user_id ASC
LIMIT 10;
-- longer nested lateral joins
SELECT *
FROM
(SELECT "some_users_data".user_id,
"some_recent_users".value_3
FROM
(SELECT filter_users_1.user_id,
value_3
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 20 and user_id < 70 and users.value_2 = 200) filter_users_1
JOIN LATERAL
(SELECT user_id,
value_3
FROM events_table as "events"
WHERE user_id > 20 and user_id < 70
AND ("events".user_id = "filter_users_1".user_id)
ORDER BY value_3 DESC
LIMIT 1) "last_events_1" ON TRUE
ORDER BY value_3 DESC
LIMIT 10) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 200
LIMIT 1) "some_users_data" ON TRUE
ORDER BY value_3 DESC
LIMIT 10) "some_users"
order BY
value_3 DESC
limit 10;
-- longer nested lateral join wth top level join
SELECT "some_users_data".user_id, "some_recent_users".value_3
FROM
(SELECT filter_users_1.user_id, value_3
FROM
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 20 and user_id < 70 and users.value_2 = 200
) filter_users_1
JOIN LATERAL
(SELECT user_id, value_3
FROM events_table as "events"
WHERE user_id > 20 and user_id < 70
AND ("events".user_id = "filter_users_1".user_id)
ORDER BY value_3 DESC
LIMIT 1
) "last_events_1" ON TRUE
ORDER BY value_3 DESC
LIMIT 10
) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND users.value_2 > 200
LIMIT 1
) "some_users_data" ON TRUE
ORDER BY value_3 DESC
LIMIT 10;
-- LEFT JOINs used with INNER JOINs
SELECT
count(*) AS cnt, "generated_group_field"
FROM
(SELECT "eventQuery"."user_id", random(), generated_group_field
FROM
(SELECT "multi_group_wrapper_1".*, generated_group_field, random()
FROM
(SELECT *
FROM
(SELECT "events"."time", "events"."user_id" as event_user_id
FROM events_table as "events"
WHERE user_id > 80) "temp_data_queries"
INNER JOIN
(SELECT "users"."user_id"
FROM users_table as "users"
WHERE user_id > 80 and value_2 = 5) "user_filters_1"
on ("temp_data_queries".event_user_id = "user_filters_1".user_id)) AS "multi_group_wrapper_1"
LEFT JOIN
(SELECT "users"."user_id" AS "user_id", value_2 AS "generated_group_field"
FROM users_table as "users") "left_group_by_1"
on ("left_group_by_1".user_id = "multi_group_wrapper_1".event_user_id)) "eventQuery") "pushedDownQuery"
group BY
"generated_group_field"
ORDER BY cnt DESC, generated_group_field ASC
LIMIT 10;
-- single table subquery, no JOINS involved
SELECT
count(*) AS cnt, user_id
FROM
(SELECT "eventQuery"."user_id", random()
FROM
(SELECT "events"."user_id"
FROM events_table "events"
WHERE event_type IN (10, 20, 30, 40, 50, 60, 70, 80, 90)) "eventQuery") "pushedDownQuery"
GROUP BY
"user_id"
ORDER BY cnt DESC, user_id DESC
LIMIT 10;
-- lateral joins in the nested manner
SELECT *
FROM
(SELECT "some_users_data".user_id, value_2
FROM
(SELECT user_id,
Max(value_2) AS value_2
FROM
(SELECT user_id,
value_2
FROM
(SELECT user_id,
value_2
FROM events_table as "events"
WHERE user_id > 10 and user_id < 20) "events_1"
ORDER BY value_2 DESC
LIMIT 10000) "recent_events_1"
GROUP BY user_id
ORDER BY max(value_2) DESC) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."user_id" = "some_recent_users"."user_id"
AND value_2 > 75
LIMIT 1) "some_users_data" ON TRUE
ORDER BY value_2 DESC
LIMIT 10) "some_users"
order BY value_2 DESC, user_id DESC
limit 10;
-- not supported since join is not on the partition key
SELECT *
FROM
(SELECT "some_users_data".user_id, value_2
FROM
(SELECT user_id,
Max(value_2) AS value_2
FROM
(SELECT user_id,
value_2
FROM
(SELECT user_id,
value_2
FROM events_table as "events"
WHERE user_id > 10 and user_id < 20) "events_1"
ORDER BY value_2 DESC
LIMIT 10000) "recent_events_1"
GROUP BY user_id
ORDER BY max(value_2) DESC) "some_recent_users"
JOIN LATERAL
(SELECT "users".user_id
FROM users_table as "users"
WHERE "users"."value_2" = "some_recent_users"."user_id"
AND value_2 > 75
LIMIT 1) "some_users_data" ON TRUE
ORDER BY value_2 DESC
LIMIT 10) "some_users"
order BY value_2 DESC, user_id DESC
limit 10;
SET citus.subquery_pushdown TO FALSE;
SET citus.enable_router_execution TO TRUE;
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