mirror of https://github.com/citusdata/citus.git
574 lines
40 KiB
Plaintext
574 lines
40 KiB
Plaintext
-- ===================================================================
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-- test recursive planning functionality with subqueries and CTEs
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-- ===================================================================
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SET search_path TO subquery_and_ctes;
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CREATE TABLE users_table_local AS SELECT * FROM users_table;
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CREATE TABLE dist_table (id int, value int);
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SELECT create_distributed_table('dist_table', 'id', colocate_with => 'users_table');
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create_distributed_table
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--------------------------
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(1 row)
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INSERT INTO dist_table (id, value) VALUES(1, 2),(2, 3),(3,4);
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CREATE FUNCTION func() RETURNS TABLE (id int, value int) AS $$
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SELECT 1, 2
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$$ LANGUAGE SQL;
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SET client_min_messages TO DEBUG1;
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-- CTEs are recursively planned, and subquery foo is also recursively planned
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-- final plan becomes a router plan
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WITH cte AS (
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WITH local_cte AS (
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SELECT * FROM users_table_local
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),
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dist_cte AS (
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SELECT user_id FROM events_table
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)
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SELECT dist_cte.user_id FROM local_cte JOIN dist_cte ON dist_cte.user_id=local_cte.user_id
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)
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SELECT
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count(*)
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FROM
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cte,
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(SELECT
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DISTINCT users_table.user_id
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FROM
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users_table, events_table
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WHERE
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users_table.user_id = events_table.user_id AND
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event_type IN (1,2,3,4)
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ORDER BY 1 DESC LIMIT 5
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) as foo
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WHERE foo.user_id = cte.user_id;
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DEBUG: generating subplan 3_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: generating subplan 4_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
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DEBUG: generating subplan 4_2 for CTE dist_cte: SELECT user_id FROM subquery_and_ctes.events_table
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DEBUG: Plan 4 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('4_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('4_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: push down of limit count: 5
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DEBUG: generating subplan 3_2 for subquery SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
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DEBUG: Plan 3 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('3_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('3_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id OPERATOR(pg_catalog.=) cte.user_id)
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count
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-------
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1644
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(1 row)
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-- CTEs are colocated, route entire query
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WITH cte1 AS (
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SELECT * FROM users_table WHERE user_id = 1
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), cte2 AS (
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SELECT * FROM events_table WHERE user_id = 1
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)
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SELECT cte1.user_id, cte1.value_1, cte2.user_id, cte2.event_type
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FROM cte1, cte2
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ORDER BY cte1.user_id, cte1.value_1, cte2.user_id, cte2.event_type
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LIMIT 5;
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user_id | value_1 | user_id | event_type
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---------+---------+---------+------------
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1 | 1 | 1 | 0
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1 | 1 | 1 | 0
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1 | 1 | 1 | 1
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1 | 1 | 1 | 1
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1 | 1 | 1 | 2
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(5 rows)
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-- CTEs aren't colocated, CTEs become intermediate results
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WITH cte1 AS (
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SELECT * FROM users_table WHERE user_id = 1
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), cte2 AS (
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SELECT * FROM events_table WHERE user_id = 6
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)
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SELECT cte1.user_id, cte1.value_1, cte2.user_id, cte2.user_id
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FROM cte1, cte2
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ORDER BY cte1.user_id, cte1.value_1, cte2.user_id, cte2.event_type
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LIMIT 5;
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DEBUG: generating subplan 8_1 for CTE cte1: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table WHERE (user_id OPERATOR(pg_catalog.=) 1)
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DEBUG: generating subplan 8_2 for CTE cte2: SELECT user_id, "time", event_type, value_2, value_3, value_4 FROM subquery_and_ctes.events_table WHERE (user_id OPERATOR(pg_catalog.=) 6)
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DEBUG: Plan 8 query after replacing subqueries and CTEs: SELECT cte1.user_id, cte1.value_1, cte2.user_id, cte2.user_id FROM (SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('8_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) cte1, (SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.event_type, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('8_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, event_type integer, value_2 integer, value_3 double precision, value_4 bigint)) cte2 ORDER BY cte1.user_id, cte1.value_1, cte2.user_id, cte2.event_type LIMIT 5
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user_id | value_1 | user_id | user_id
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---------+---------+---------+---------
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1 | 1 | 6 | 6
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1 | 1 | 6 | 6
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1 | 1 | 6 | 6
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1 | 1 | 6 | 6
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1 | 1 | 6 | 6
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(5 rows)
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-- users_table & dist_table are colocated, route entire query
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WITH cte1 AS (
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SELECT * FROM users_table WHERE user_id = 1
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)
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UPDATE dist_table dt SET value = cte1.value_1
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FROM cte1 WHERE cte1.user_id = dt.id AND dt.id = 1;
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-- users_table & events_table & dist_table are colocated, route entire query
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WITH cte1 AS (
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SELECT * FROM users_table WHERE user_id = 1
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), cte2 AS (
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SELECT * FROM events_table WHERE user_id = 1
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)
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UPDATE dist_table dt SET value = cte1.value_1 + cte2.event_type
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FROM cte1, cte2 WHERE cte1.user_id = dt.id AND dt.id = 1;
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-- all relations are not colocated, CTEs become intermediate results
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WITH cte1 AS (
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SELECT * FROM users_table WHERE user_id = 1
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), cte2 AS (
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SELECT * FROM events_table WHERE user_id = 6
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)
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UPDATE dist_table dt SET value = cte1.value_1 + cte2.event_type
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FROM cte1, cte2 WHERE cte1.user_id = dt.id AND dt.id = 1;
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DEBUG: generating subplan 13_1 for CTE cte1: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table WHERE (user_id OPERATOR(pg_catalog.=) 1)
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DEBUG: generating subplan 13_2 for CTE cte2: SELECT user_id, "time", event_type, value_2, value_3, value_4 FROM subquery_and_ctes.events_table WHERE (user_id OPERATOR(pg_catalog.=) 6)
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DEBUG: Plan 13 query after replacing subqueries and CTEs: UPDATE subquery_and_ctes.dist_table dt SET value = (cte1.value_1 OPERATOR(pg_catalog.+) cte2.event_type) FROM (SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('13_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) cte1, (SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.event_type, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('13_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, event_type integer, value_2 integer, value_3 double precision, value_4 bigint)) cte2 WHERE ((cte1.user_id OPERATOR(pg_catalog.=) dt.id) AND (dt.id OPERATOR(pg_catalog.=) 1))
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-- volatile function calls should not be routed
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WITH cte1 AS (SELECT id, value FROM func())
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UPDATE dist_table dt SET value = cte1.value
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FROM cte1 WHERE dt.id = 1;
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DEBUG: generating subplan 16_1 for CTE cte1: SELECT id, value FROM subquery_and_ctes.func() func(id, value)
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DEBUG: Plan 16 query after replacing subqueries and CTEs: UPDATE subquery_and_ctes.dist_table dt SET value = cte1.value FROM (SELECT intermediate_result.id, intermediate_result.value FROM read_intermediate_result('16_1'::text, 'binary'::citus_copy_format) intermediate_result(id integer, value integer)) cte1 WHERE (dt.id OPERATOR(pg_catalog.=) 1)
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-- CTEs are recursively planned, and subquery foo is also recursively planned
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-- final plan becomes a real-time plan since we also have events_table in the
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-- range table entries
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WITH cte AS (
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WITH local_cte AS (
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SELECT * FROM users_table_local
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),
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dist_cte AS (
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SELECT user_id FROM events_table
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)
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SELECT dist_cte.user_id FROM local_cte JOIN dist_cte ON dist_cte.user_id=local_cte.user_id
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)
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SELECT
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count(*)
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FROM
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cte,
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(SELECT
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DISTINCT users_table.user_id
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FROM
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users_table, events_table
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WHERE
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users_table.user_id = events_table.user_id AND
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event_type IN (1,2,3,4)
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ORDER BY 1 DESC LIMIT 5
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) as foo, events_table
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WHERE foo.user_id = cte.user_id AND events_table.user_id = cte.user_id;
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DEBUG: generating subplan 17_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: generating subplan 18_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
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DEBUG: generating subplan 18_2 for CTE dist_cte: SELECT user_id FROM subquery_and_ctes.events_table
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DEBUG: Plan 18 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('18_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('18_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: push down of limit count: 5
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DEBUG: generating subplan 17_2 for subquery SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
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DEBUG: Plan 17 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('17_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('17_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo, subquery_and_ctes.events_table WHERE ((foo.user_id OPERATOR(pg_catalog.=) cte.user_id) AND (events_table.user_id OPERATOR(pg_catalog.=) cte.user_id))
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count
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-------
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30608
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(1 row)
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-- CTEs are replaced and subquery in WHERE is also replaced
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-- but the query is still real-time query since users_table is in the
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-- range table list
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WITH cte AS (
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WITH local_cte AS (
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SELECT * FROM users_table_local
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),
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dist_cte AS (
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SELECT user_id FROM events_table
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)
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SELECT dist_cte.user_id FROM local_cte JOIN dist_cte ON dist_cte.user_id=local_cte.user_id
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)
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SELECT DISTINCT cte.user_id
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FROM users_table, cte
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WHERE
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users_table.user_id = cte.user_id AND
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users_table.user_id IN (SELECT DISTINCT value_2 FROM users_table WHERE value_1 >= 1 AND value_1 <= 20 ORDER BY 1 LIMIT 5)
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ORDER BY 1 DESC;
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DEBUG: generating subplan 21_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: generating subplan 22_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
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DEBUG: generating subplan 22_2 for CTE dist_cte: SELECT user_id FROM subquery_and_ctes.events_table
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DEBUG: Plan 22 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('22_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('22_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: push down of limit count: 5
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DEBUG: generating subplan 21_2 for subquery SELECT DISTINCT value_2 FROM subquery_and_ctes.users_table WHERE ((value_1 OPERATOR(pg_catalog.>=) 1) AND (value_1 OPERATOR(pg_catalog.<=) 20)) ORDER BY value_2 LIMIT 5
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DEBUG: Plan 21 query after replacing subqueries and CTEs: SELECT DISTINCT cte.user_id FROM subquery_and_ctes.users_table, (SELECT intermediate_result.user_id FROM read_intermediate_result('21_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte WHERE ((users_table.user_id OPERATOR(pg_catalog.=) cte.user_id) AND (users_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT intermediate_result.value_2 FROM read_intermediate_result('21_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)))) ORDER BY cte.user_id DESC
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user_id
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---------
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4
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3
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2
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1
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(4 rows)
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-- subquery in WHERE clause is planned recursively due to the recurring table
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-- in FROM clause
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WITH cte AS (
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WITH local_cte AS (
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SELECT * FROM users_table_local
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),
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dist_cte AS (
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SELECT user_id FROM events_table
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)
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SELECT dist_cte.user_id FROM local_cte JOIN dist_cte ON dist_cte.user_id=local_cte.user_id
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)
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SELECT DISTINCT cte.user_id
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FROM cte
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WHERE
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cte.user_id IN (SELECT DISTINCT user_id FROM users_table WHERE value_1 >= 1 AND value_1 <= 20)
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ORDER BY 1 DESC;
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DEBUG: generating subplan 25_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: generating subplan 26_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
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DEBUG: generating subplan 26_2 for CTE dist_cte: SELECT user_id FROM subquery_and_ctes.events_table
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DEBUG: Plan 26 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('26_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('26_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
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DEBUG: generating subplan 25_2 for subquery SELECT DISTINCT user_id FROM subquery_and_ctes.users_table WHERE ((value_1 OPERATOR(pg_catalog.>=) 1) AND (value_1 OPERATOR(pg_catalog.<=) 20))
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DEBUG: Plan 25 query after replacing subqueries and CTEs: SELECT DISTINCT user_id FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('25_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte WHERE (user_id OPERATOR(pg_catalog.=) ANY (SELECT intermediate_result.user_id FROM read_intermediate_result('25_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer))) ORDER BY user_id DESC
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user_id
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---------
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6
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5
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4
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3
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2
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1
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(6 rows)
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-- CTEs inside a subquery and the final query becomes a router
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-- query
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SELECT
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user_id
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FROM
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(
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WITH cte AS (
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SELECT
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DISTINCT users_table.user_id
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FROM
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users_table, events_table
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WHERE
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users_table.user_id = events_table.user_id AND
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event_type IN (1,2,3,4)
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) SELECT * FROM cte ORDER BY 1 DESC
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) as foo
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ORDER BY 1 DESC;
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DEBUG: generating subplan 29_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4])))
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DEBUG: Plan 29 query after replacing subqueries and CTEs: SELECT user_id FROM (SELECT cte.user_id FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('29_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte ORDER BY cte.user_id DESC) foo ORDER BY user_id DESC
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user_id
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---------
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6
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5
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4
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3
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2
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1
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(6 rows)
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-- CTEs inside a subquery and the final query becomes a
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-- real-time query since the other subquery is safe to pushdown
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SELECT
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bar.user_id
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FROM
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(
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WITH cte AS (
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SELECT
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DISTINCT users_table.user_id
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FROM
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users_table, events_table
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WHERE
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users_table.user_id = events_table.user_id AND
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event_type IN (1,2,3,4)
|
|
) SELECT * FROM cte ORDER BY 1 DESC
|
|
) as foo,
|
|
(
|
|
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)
|
|
) as bar
|
|
WHERE foo.user_id = bar.user_id
|
|
ORDER BY 1 DESC;
|
|
DEBUG: generating subplan 31_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4])))
|
|
DEBUG: Plan 31 query after replacing subqueries and CTEs: SELECT bar.user_id FROM (SELECT cte.user_id FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('31_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte ORDER BY cte.user_id DESC) foo, (SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4])))) bar WHERE (foo.user_id OPERATOR(pg_catalog.=) bar.user_id) ORDER BY bar.user_id DESC
|
|
user_id
|
|
---------
|
|
6
|
|
5
|
|
4
|
|
3
|
|
2
|
|
1
|
|
(6 rows)
|
|
|
|
-- CTEs inside a deeper subquery
|
|
-- and also the subquery that contains the CTE is replaced
|
|
SELECT
|
|
DISTINCT bar.user_id
|
|
FROM
|
|
(
|
|
WITH cte 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)
|
|
) SELECT * FROM cte ORDER BY 1 DESC
|
|
) as foo,
|
|
(
|
|
SELECT
|
|
users_table.user_id, some_events.event_type
|
|
FROM
|
|
users_table,
|
|
(
|
|
WITH cte AS (
|
|
SELECT
|
|
event_type, users_table.user_id
|
|
FROM
|
|
users_table, events_table
|
|
WHERE
|
|
users_table.user_id = events_table.user_id AND
|
|
value_1 IN (1,2)
|
|
) SELECT * FROM cte ORDER BY 1 DESC
|
|
) as some_events
|
|
WHERE
|
|
users_table.user_id = some_events.user_id AND
|
|
event_type IN (1,2,3,4)
|
|
ORDER BY 2,1
|
|
LIMIT 2
|
|
) as bar
|
|
WHERE foo.user_id = bar.user_id
|
|
ORDER BY 1 DESC LIMIT 5;
|
|
DEBUG: generating subplan 33_1 for CTE cte: SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4])))
|
|
DEBUG: generating subplan 33_2 for CTE cte: SELECT events_table.event_type, users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (users_table.value_1 OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2])))
|
|
DEBUG: push down of limit count: 2
|
|
DEBUG: generating subplan 33_3 for subquery SELECT users_table.user_id, some_events.event_type FROM subquery_and_ctes.users_table, (SELECT cte.event_type, cte.user_id FROM (SELECT intermediate_result.event_type, intermediate_result.user_id FROM read_intermediate_result('33_2'::text, 'binary'::citus_copy_format) intermediate_result(event_type integer, user_id integer)) cte ORDER BY cte.event_type DESC) some_events WHERE ((users_table.user_id OPERATOR(pg_catalog.=) some_events.user_id) AND (some_events.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4]))) ORDER BY some_events.event_type, users_table.user_id LIMIT 2
|
|
DEBUG: Plan 33 query after replacing subqueries and CTEs: SELECT DISTINCT bar.user_id FROM (SELECT cte.user_id FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('33_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte ORDER BY cte.user_id DESC) foo, (SELECT intermediate_result.user_id, intermediate_result.event_type FROM read_intermediate_result('33_3'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, event_type integer)) bar WHERE (foo.user_id OPERATOR(pg_catalog.=) bar.user_id) ORDER BY bar.user_id DESC LIMIT 5
|
|
user_id
|
|
---------
|
|
1
|
|
(1 row)
|
|
|
|
-- CTEs on the different parts of the query is replaced
|
|
-- and subquery foo is also replaced since it contains
|
|
-- DISTINCT on a non-partition key
|
|
SELECT * FROM
|
|
(
|
|
WITH cte AS (
|
|
WITH local_cte AS (
|
|
SELECT * FROM users_table_local
|
|
),
|
|
dist_cte AS (
|
|
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
|
|
ORDER BY 3 DESC, 2 DESC, 1 DESC
|
|
LIMIT 5;
|
|
DEBUG: generating subplan 37_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: generating subplan 38_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
|
|
DEBUG: generating subplan 38_2 for CTE dist_cte: SELECT user_id FROM subquery_and_ctes.events_table
|
|
DEBUG: Plan 38 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('38_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('38_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: generating subplan 37_2 for CTE cte_in_where: SELECT DISTINCT value_2 FROM subquery_and_ctes.users_table WHERE ((value_1 OPERATOR(pg_catalog.>=) 1) AND (value_1 OPERATOR(pg_catalog.<=) 20)) ORDER BY value_2 LIMIT 5
|
|
DEBUG: push down of limit count: 5
|
|
DEBUG: generating subplan 37_3 for subquery SELECT DISTINCT cte.user_id FROM subquery_and_ctes.users_table, (SELECT intermediate_result.user_id FROM read_intermediate_result('37_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte WHERE ((users_table.user_id OPERATOR(pg_catalog.=) cte.user_id) AND (users_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT cte_in_where.value_2 FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('37_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) cte_in_where))) ORDER BY cte.user_id DESC
|
|
DEBUG: Plan 37 query after replacing subqueries and CTEs: SELECT foo.user_id, events_table.user_id, events_table."time", events_table.event_type, events_table.value_2, events_table.value_3, events_table.value_4 FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('37_3'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo, subquery_and_ctes.events_table WHERE (foo.user_id OPERATOR(pg_catalog.=) events_table.value_2) ORDER BY events_table."time" DESC, events_table.user_id DESC, foo.user_id DESC LIMIT 5
|
|
DEBUG: push down of limit count: 5
|
|
user_id | user_id | time | event_type | value_2 | value_3 | value_4
|
|
---------+---------+---------------------------------+------------+---------+---------+---------
|
|
4 | 1 | Thu Nov 23 21:54:46.924477 2017 | 6 | 4 | 5 |
|
|
2 | 4 | Thu Nov 23 18:10:21.338399 2017 | 1 | 2 | 4 |
|
|
4 | 3 | Thu Nov 23 18:08:26.550729 2017 | 2 | 4 | 3 |
|
|
2 | 3 | Thu Nov 23 16:44:41.903713 2017 | 4 | 2 | 2 |
|
|
1 | 3 | Thu Nov 23 16:31:56.219594 2017 | 5 | 1 | 2 |
|
|
(5 rows)
|
|
|
|
-- now recursively plan subqueries inside the CTEs that contains LIMIT and OFFSET
|
|
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(*)
|
|
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;
|
|
DEBUG: generating subplan 42_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT DISTINCT users_table.value_2 FROM subquery_and_ctes.users_table OFFSET 0) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT DISTINCT users_table.value_1 FROM subquery_and_ctes.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: generating subplan 43_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
|
|
DEBUG: generating subplan 43_2 for CTE dist_cte: SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT DISTINCT users_table.value_2 FROM subquery_and_ctes.users_table OFFSET 0) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT DISTINCT users_table.value_1 FROM subquery_and_ctes.users_table ORDER BY users_table.value_1 LIMIT 3)))
|
|
DEBUG: push down of limit count: 3
|
|
DEBUG: generating subplan 44_1 for subquery SELECT DISTINCT value_1 FROM subquery_and_ctes.users_table ORDER BY value_1 LIMIT 3
|
|
DEBUG: generating subplan 44_2 for subquery SELECT DISTINCT value_2 FROM subquery_and_ctes.users_table OFFSET 0
|
|
DEBUG: Plan 44 query after replacing subqueries and CTEs: SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT intermediate_result.value_2 FROM read_intermediate_result('44_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT intermediate_result.value_1 FROM read_intermediate_result('44_1'::text, 'binary'::citus_copy_format) intermediate_result(value_1 integer))))
|
|
DEBUG: Plan 43 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('43_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('43_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: push down of limit count: 5
|
|
DEBUG: generating subplan 42_2 for subquery SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
|
|
DEBUG: Plan 42 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('42_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('42_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id OPERATOR(pg_catalog.=) cte.user_id)
|
|
count
|
|
-------
|
|
432
|
|
(1 row)
|
|
|
|
-- the same query, but this time the CTEs also live inside a subquery
|
|
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
|
|
ORDER BY 3 DESC, 1 DESC, 2 DESC, 4 DESC
|
|
LIMIT 5;
|
|
DEBUG: generating subplan 48_1 for CTE cte: WITH local_cte AS (SELECT users_table_local.user_id, users_table_local."time", users_table_local.value_1, users_table_local.value_2, users_table_local.value_3, users_table_local.value_4 FROM subquery_and_ctes.users_table_local), dist_cte AS (SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT DISTINCT users_table.value_2 FROM subquery_and_ctes.users_table OFFSET 0) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT DISTINCT users_table.value_1 FROM subquery_and_ctes.users_table ORDER BY users_table.value_1 LIMIT 3)))) SELECT dist_cte.user_id FROM (local_cte JOIN dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: generating subplan 49_1 for CTE local_cte: SELECT user_id, "time", value_1, value_2, value_3, value_4 FROM subquery_and_ctes.users_table_local
|
|
DEBUG: generating subplan 49_2 for CTE dist_cte: SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT DISTINCT users_table.value_2 FROM subquery_and_ctes.users_table OFFSET 0) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT DISTINCT users_table.value_1 FROM subquery_and_ctes.users_table ORDER BY users_table.value_1 LIMIT 3)))
|
|
DEBUG: push down of limit count: 3
|
|
DEBUG: generating subplan 50_1 for subquery SELECT DISTINCT value_1 FROM subquery_and_ctes.users_table ORDER BY value_1 LIMIT 3
|
|
DEBUG: generating subplan 50_2 for subquery SELECT DISTINCT value_2 FROM subquery_and_ctes.users_table OFFSET 0
|
|
DEBUG: Plan 50 query after replacing subqueries and CTEs: SELECT events_table.user_id FROM subquery_and_ctes.events_table, (SELECT intermediate_result.value_2 FROM read_intermediate_result('50_2'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo WHERE ((events_table.user_id OPERATOR(pg_catalog.=) foo.value_2) AND (events_table.user_id OPERATOR(pg_catalog.=) ANY (SELECT intermediate_result.value_1 FROM read_intermediate_result('50_1'::text, 'binary'::citus_copy_format) intermediate_result(value_1 integer))))
|
|
DEBUG: Plan 49 query after replacing subqueries and CTEs: SELECT dist_cte.user_id FROM ((SELECT intermediate_result.user_id, intermediate_result."time", intermediate_result.value_1, intermediate_result.value_2, intermediate_result.value_3, intermediate_result.value_4 FROM read_intermediate_result('49_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer, "time" timestamp without time zone, value_1 integer, value_2 integer, value_3 double precision, value_4 bigint)) local_cte JOIN (SELECT intermediate_result.user_id FROM read_intermediate_result('49_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) dist_cte ON ((dist_cte.user_id OPERATOR(pg_catalog.=) local_cte.user_id)))
|
|
DEBUG: push down of limit count: 5
|
|
DEBUG: generating subplan 48_2 for subquery SELECT DISTINCT users_table.user_id FROM subquery_and_ctes.users_table, subquery_and_ctes.events_table WHERE ((users_table.user_id OPERATOR(pg_catalog.=) events_table.user_id) AND (events_table.event_type OPERATOR(pg_catalog.=) ANY (ARRAY[1, 2, 3, 4]))) ORDER BY users_table.user_id DESC LIMIT 5
|
|
DEBUG: generating subplan 48_3 for subquery SELECT count(*) AS cnt FROM (SELECT intermediate_result.user_id FROM read_intermediate_result('48_1'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) cte, (SELECT intermediate_result.user_id FROM read_intermediate_result('48_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) foo WHERE (foo.user_id OPERATOR(pg_catalog.=) cte.user_id)
|
|
DEBUG: Plan 48 query after replacing subqueries and CTEs: SELECT foo.cnt, users_table.user_id, users_table."time", users_table.value_1, users_table.value_2, users_table.value_3, users_table.value_4 FROM (SELECT intermediate_result.cnt FROM read_intermediate_result('48_3'::text, 'binary'::citus_copy_format) intermediate_result(cnt bigint)) foo, subquery_and_ctes.users_table WHERE (foo.cnt OPERATOR(pg_catalog.>) users_table.value_2) ORDER BY users_table."time" DESC, foo.cnt DESC, users_table.user_id DESC, users_table.value_1 DESC LIMIT 5
|
|
DEBUG: push down of limit count: 5
|
|
cnt | user_id | time | value_1 | value_2 | value_3 | value_4
|
|
-----+---------+---------------------------------+---------+---------+---------+---------
|
|
432 | 1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 4 |
|
|
432 | 1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 3 |
|
|
432 | 3 | Thu Nov 23 17:18:51.048758 2017 | 1 | 5 | 5 |
|
|
432 | 3 | Thu Nov 23 17:10:35.959913 2017 | 4 | 3 | 1 |
|
|
432 | 5 | Thu Nov 23 16:48:32.08896 2017 | 5 | 2 | 1 |
|
|
(5 rows)
|
|
|
|
-- recursive CTES are not supported inside subqueries as well
|
|
SELECT
|
|
bar.user_id
|
|
FROM
|
|
(
|
|
WITH RECURSIVE cte 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)
|
|
) SELECT * FROM cte ORDER BY 1 DESC
|
|
) as foo,
|
|
(
|
|
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)
|
|
) as bar
|
|
WHERE foo.user_id = bar.user_id
|
|
ORDER BY 1 DESC;
|
|
ERROR: recursive CTEs are not supported in distributed queries
|
|
-- We error-out when there's an error in execution of the query. By repeating it
|
|
-- multiple times, we increase the chance of this test failing before PR #1903.
|
|
SET client_min_messages TO ERROR;
|
|
DO $$
|
|
DECLARE
|
|
errors_received INTEGER;
|
|
BEGIN
|
|
errors_received := 0;
|
|
FOR i IN 1..3 LOOP
|
|
BEGIN
|
|
WITH cte as (
|
|
SELECT
|
|
user_id, value_2
|
|
from
|
|
events_table
|
|
)
|
|
SELECT * FROM users_table where value_2 < (
|
|
SELECT
|
|
min(cte.value_2)
|
|
FROM
|
|
cte
|
|
WHERE
|
|
users_table.user_id=cte.user_id
|
|
GROUP BY
|
|
user_id, cte.value_2);
|
|
EXCEPTION WHEN OTHERS THEN
|
|
IF SQLERRM LIKE 'more than one row returned by a subquery%%' THEN
|
|
errors_received := errors_received + 1;
|
|
ELSIF SQLERRM LIKE 'failed to execute task%' THEN
|
|
errors_received := errors_received + 1;
|
|
END IF;
|
|
END;
|
|
END LOOP;
|
|
RAISE '(%/3) failed to execute one of the tasks', errors_received;
|
|
END;
|
|
$$;
|
|
ERROR: (3/3) failed to execute one of the tasks
|
|
CONTEXT: PL/pgSQL function inline_code_block line 31 at RAISE
|
|
SET client_min_messages TO DEFAULT;
|
|
DROP SCHEMA subquery_and_ctes CASCADE;
|
|
NOTICE: drop cascades to 5 other objects
|
|
DETAIL: drop cascades to table users_table
|
|
drop cascades to table events_table
|
|
drop cascades to table users_table_local
|
|
drop cascades to table dist_table
|
|
drop cascades to function func()
|
|
SET search_path TO public;
|