mirror of https://github.com/citusdata/citus.git
149 lines
6.9 KiB
Plaintext
149 lines
6.9 KiB
Plaintext
-- ===================================================================
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-- test recursive planning functionality with different executors
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-- ===================================================================
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CREATE SCHEMA subquery_executor;
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SET search_path TO subquery_executor, public;
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CREATE TABLE users_table_local AS SELECT * FROM users_table;
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SET client_min_messages TO DEBUG1;
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-- subquery with router planner
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SELECT
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count(*)
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FROM
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(
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SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
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) as foo,
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(
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SELECT user_id FROM users_table
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) as bar
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WHERE foo.value_2 = bar.user_id;
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DEBUG: generating subplan 2_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 15) OFFSET 0
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DEBUG: Plan 2 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('2_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table) bar WHERE (foo.value_2 = bar.user_id)
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count
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-------
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0
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(1 row)
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-- subquery with router but not logical plannable
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-- should fail
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SELECT
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count(*)
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FROM
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(
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SELECT user_id, sum(value_2) over (partition by user_id) AS counter FROM users_table WHERE user_id = 15
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) as foo,
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(
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SELECT user_id FROM users_table
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) as bar
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WHERE foo.counter = bar.user_id;
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ERROR: complex joins are only supported when all distributed tables are joined on their distribution columns with equal operator
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-- subquery with real-time query
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SELECT
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count(*)
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FROM
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(
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SELECT value_2 FROM users_table WHERE user_id != 15 OFFSET 0
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) as foo,
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(
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SELECT user_id FROM users_table
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) as bar
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WHERE foo.value_2 = bar.user_id;
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DEBUG: generating subplan 5_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id <> 15) OFFSET 0
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DEBUG: Plan 5 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('5_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table) bar WHERE (foo.value_2 = bar.user_id)
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count
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-------
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1612
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(1 row)
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-- subquery with repartition query
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SET citus.enable_repartition_joins to ON;
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SELECT
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count(*)
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FROM
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(
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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
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) as foo,
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(
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SELECT user_id FROM users_table
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) as bar
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WHERE foo.value_2 = bar.user_id;
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DEBUG: cannot use real time executor with repartition jobs
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HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
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DEBUG: generating subplan 7_1 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
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DEBUG: Plan 7 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('7_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table) bar WHERE (foo.value_2 = bar.user_id)
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count
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-------
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58
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(1 row)
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-- mixed of all executors (including local execution)
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SELECT
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count(*)
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FROM
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(
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SELECT value_2 FROM users_table WHERE user_id = 15 OFFSET 0
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) as foo,
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(
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SELECT user_id FROM users_table OFFSET 0
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) as bar,
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(
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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
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) baz,
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(
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SELECT user_id FROM users_table_local WHERE user_id = 2
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) baw
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WHERE foo.value_2 = bar.user_id AND baz.value_2 = bar.user_id AND bar.user_id = baw.user_id;
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DEBUG: generating subplan 9_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 15) OFFSET 0
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DEBUG: generating subplan 9_2 for subquery SELECT user_id FROM public.users_table OFFSET 0
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DEBUG: cannot use real time executor with repartition jobs
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HINT: Since you enabled citus.enable_repartition_joins Citus chose to use task-tracker.
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DEBUG: generating subplan 9_3 for subquery SELECT DISTINCT users_table.value_2 FROM public.users_table, public.events_table WHERE ((users_table.user_id = events_table.value_2) AND (users_table.user_id < 2))
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DEBUG: generating subplan 9_4 for subquery SELECT user_id FROM subquery_executor.users_table_local WHERE (user_id = 2)
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DEBUG: Plan 9 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('9_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT intermediate_result.user_id FROM read_intermediate_result('9_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) bar, (SELECT intermediate_result.value_2 FROM read_intermediate_result('9_3'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) baz, (SELECT intermediate_result.user_id FROM read_intermediate_result('9_4'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) baw WHERE ((foo.value_2 = bar.user_id) AND (baz.value_2 = bar.user_id) AND (bar.user_id = baw.user_id))
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count
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-------
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0
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(1 row)
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SET citus.enable_repartition_joins to OFF;
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-- final query is router
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SELECT
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count(*)
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FROM
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(
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SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
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) as foo,
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(
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SELECT user_id FROM users_table WHERE user_id = 2 OFFSET 0
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) as bar
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WHERE foo.value_2 = bar.user_id;
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DEBUG: generating subplan 13_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 1) OFFSET 0
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DEBUG: generating subplan 13_2 for subquery SELECT user_id FROM public.users_table WHERE (user_id = 2) OFFSET 0
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DEBUG: Plan 13 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('13_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT intermediate_result.user_id FROM read_intermediate_result('13_2'::text, 'binary'::citus_copy_format) intermediate_result(user_id integer)) bar WHERE (foo.value_2 = bar.user_id)
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count
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-------
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18
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(1 row)
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-- final query is real-time
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SELECT
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count(*)
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FROM
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(
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SELECT value_2 FROM users_table WHERE user_id = 1 OFFSET 0
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) as foo,
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(
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SELECT user_id FROM users_table WHERE user_id != 2
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) as bar
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WHERE foo.value_2 = bar.user_id;
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DEBUG: generating subplan 16_1 for subquery SELECT value_2 FROM public.users_table WHERE (user_id = 1) OFFSET 0
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DEBUG: Plan 16 query after replacing subqueries and CTEs: SELECT count(*) AS count FROM (SELECT intermediate_result.value_2 FROM read_intermediate_result('16_1'::text, 'binary'::citus_copy_format) intermediate_result(value_2 integer)) foo, (SELECT users_table.user_id FROM public.users_table WHERE (users_table.user_id <> 2)) bar WHERE (foo.value_2 = bar.user_id)
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count
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-------
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103
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(1 row)
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SET client_min_messages TO DEFAULT;
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DROP SCHEMA subquery_executor CASCADE;
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NOTICE: drop cascades to table users_table_local
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SET search_path TO public;
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