mirror of https://github.com/citusdata/citus.git
729 lines
20 KiB
Plaintext
729 lines
20 KiB
Plaintext
-- Tests for modifying CTEs and CTEs in modifications
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SET citus.next_shard_id TO 1502000;
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CREATE SCHEMA with_modifying;
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SET search_path TO with_modifying, public;
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CREATE TABLE with_modifying.modify_table (id int, val int);
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SELECT create_distributed_table('modify_table', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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CREATE TABLE with_modifying.users_table (LIKE public.users_table INCLUDING ALL);
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SELECT create_distributed_table('with_modifying.users_table', 'user_id');
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create_distributed_table
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--------------------------
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(1 row)
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INSERT INTO with_modifying.users_table SELECT * FROM public.users_table;
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CREATE TABLE with_modifying.summary_table (id int, counter int);
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SELECT create_distributed_table('summary_table', 'id');
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create_distributed_table
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--------------------------
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(1 row)
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CREATE TABLE with_modifying.anchor_table (id int);
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SELECT create_reference_table('anchor_table');
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create_reference_table
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------------------------
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(1 row)
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-- basic insert query in CTE
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WITH basic_insert AS (
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INSERT INTO users_table VALUES (1), (2), (3) RETURNING *
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)
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SELECT
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*
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FROM
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basic_insert
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ORDER BY
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user_id;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+------+---------+---------+---------+---------
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1 | | | | |
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2 | | | | |
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3 | | | | |
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(3 rows)
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-- single-shard UPDATE in CTE
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WITH basic_update AS (
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UPDATE users_table SET value_3=41 WHERE user_id=1 RETURNING *
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)
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SELECT
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*
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FROM
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basic_update
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ORDER BY
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user_id,
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time
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LIMIT 10;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+---------------------------------+---------+---------+---------+---------
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1 | Wed Nov 22 22:51:43.132261 2017 | 4 | 0 | 41 |
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1 | Thu Nov 23 03:32:50.803031 2017 | 3 | 2 | 41 |
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1 | Thu Nov 23 09:26:42.145043 2017 | 1 | 3 | 41 |
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1 | Thu Nov 23 11:11:24.40789 2017 | 3 | 4 | 41 |
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1 | Thu Nov 23 11:44:57.515981 2017 | 4 | 3 | 41 |
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1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 41 |
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1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 41 |
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1 | | | | 41 |
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1 | | | | 41 |
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(9 rows)
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-- multi-shard UPDATE in CTE
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WITH basic_update AS (
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UPDATE users_table SET value_3=42 WHERE value_2=1 RETURNING *
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)
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SELECT
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*
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FROM
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basic_update
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ORDER BY
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user_id,
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time
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LIMIT 10;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+---------------------------------+---------+---------+---------+---------
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2 | Thu Nov 23 06:50:30.797805 2017 | 1 | 1 | 42 |
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2 | Thu Nov 23 06:56:38.46819 2017 | 0 | 1 | 42 |
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2 | Thu Nov 23 13:52:54.83829 2017 | 3 | 1 | 42 |
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3 | Wed Nov 22 18:43:51.450263 2017 | 1 | 1 | 42 |
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3 | Thu Nov 23 00:15:45.610845 2017 | 1 | 1 | 42 |
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4 | Wed Nov 22 23:59:46.493416 2017 | 3 | 1 | 42 |
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4 | Thu Nov 23 01:55:21.824618 2017 | 3 | 1 | 42 |
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4 | Thu Nov 23 06:50:08.101207 2017 | 2 | 1 | 42 |
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4 | Thu Nov 23 07:09:37.382372 2017 | 4 | 1 | 42 |
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4 | Thu Nov 23 08:38:45.877401 2017 | 4 | 1 | 42 |
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(10 rows)
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-- single-shard DELETE in CTE
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WITH basic_delete AS (
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DELETE FROM users_table WHERE user_id=6 RETURNING *
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)
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SELECT
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*
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FROM
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basic_delete
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ORDER BY
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user_id,
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time
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LIMIT 10;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+---------------------------------+---------+---------+---------+---------
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6 | Wed Nov 22 20:15:53.317797 2017 | 1 | 1 | 42 |
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6 | Wed Nov 22 23:01:24.82289 2017 | 2 | 4 | 1 |
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6 | Thu Nov 23 00:07:11.068353 2017 | 1 | 1 | 42 |
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6 | Thu Nov 23 00:09:44.19812 2017 | 5 | 2 | 0 |
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6 | Thu Nov 23 01:13:50.526322 2017 | 2 | 4 | 1 |
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6 | Thu Nov 23 01:14:55.769581 2017 | 0 | 0 | 5 |
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6 | Thu Nov 23 10:22:11.02918 2017 | 5 | 0 | 5 |
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6 | Thu Nov 23 11:08:04.244582 2017 | 2 | 3 | 2 |
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6 | Thu Nov 23 13:51:16.92838 2017 | 0 | 4 | 2 |
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6 | Thu Nov 23 14:43:18.024104 2017 | 3 | 2 | 5 |
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(10 rows)
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-- multi-shard DELETE in CTE
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WITH basic_delete AS (
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DELETE FROM users_table WHERE value_3=41 RETURNING *
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)
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SELECT
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*
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FROM
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basic_delete
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ORDER BY
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user_id,
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time
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LIMIT 10;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+---------------------------------+---------+---------+---------+---------
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1 | Wed Nov 22 22:51:43.132261 2017 | 4 | 0 | 41 |
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1 | Thu Nov 23 03:32:50.803031 2017 | 3 | 2 | 41 |
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1 | Thu Nov 23 09:26:42.145043 2017 | 1 | 3 | 41 |
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1 | Thu Nov 23 11:11:24.40789 2017 | 3 | 4 | 41 |
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1 | Thu Nov 23 11:44:57.515981 2017 | 4 | 3 | 41 |
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1 | Thu Nov 23 17:23:03.441394 2017 | 5 | 4 | 41 |
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1 | Thu Nov 23 17:30:34.635085 2017 | 3 | 4 | 41 |
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1 | | | | 41 |
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1 | | | | 41 |
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(9 rows)
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-- INSERT...SELECT query in CTE
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WITH copy_table AS (
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INSERT INTO users_table SELECT * FROM users_table WHERE user_id = 0 OR user_id = 3 RETURNING *
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)
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SELECT
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*
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FROM
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copy_table
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ORDER BY
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user_id,
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time
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LIMIT 10;
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user_id | time | value_1 | value_2 | value_3 | value_4
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---------+---------------------------------+---------+---------+---------+---------
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3 | Wed Nov 22 18:43:51.450263 2017 | 1 | 1 | 42 |
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3 | Wed Nov 22 20:43:31.008625 2017 | 1 | 3 | 2 |
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3 | Wed Nov 22 23:24:32.080584 2017 | 3 | 2 | 5 |
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3 | Thu Nov 23 00:15:45.610845 2017 | 1 | 1 | 42 |
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3 | Thu Nov 23 03:23:24.702501 2017 | 1 | 2 | 5 |
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3 | Thu Nov 23 03:52:32.008895 2017 | 4 | 2 | 0 |
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3 | Thu Nov 23 04:01:08.04806 2017 | 5 | 5 | 3 |
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3 | Thu Nov 23 05:01:44.885505 2017 | 3 | 5 | 4 |
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3 | Thu Nov 23 06:20:05.854857 2017 | 1 | 4 | 2 |
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3 | Thu Nov 23 09:57:41.540228 2017 | 2 | 2 | 3 |
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(10 rows)
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-- CTEs prior to INSERT...SELECT via the coordinator should work
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WITH cte AS (
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SELECT user_id FROM users_table WHERE value_2 IN (1, 2)
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)
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INSERT INTO modify_table (SELECT * FROM cte);
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WITH cte_1 AS (
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SELECT user_id, value_2 FROM users_table WHERE value_2 IN (1, 2, 3, 4)
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),
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cte_2 AS (
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SELECT user_id, value_2 FROM users_table WHERE value_2 IN (3, 4, 5, 6)
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)
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INSERT INTO modify_table (SELECT cte_1.user_id FROM cte_1 join cte_2 on cte_1.value_2=cte_2.value_2);
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-- we execute the query within a function to consolidate the error messages
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-- between different executors
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CREATE FUNCTION raise_failed_execution_cte(query text) RETURNS void AS $$
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BEGIN
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EXECUTE query;
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EXCEPTION WHEN OTHERS THEN
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IF SQLERRM LIKE '%more than one row returned by a subquery used as an expression%' THEN
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RAISE 'Task failed to execute';
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ELSIF SQLERRM LIKE '%could not receive query results%' THEN
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RAISE 'Task failed to execute';
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END IF;
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END;
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$$LANGUAGE plpgsql;
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SET client_min_messages TO ERROR;
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\set VERBOSITY terse
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-- even if this is an INSERT...SELECT, the CTE is under SELECT
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-- function joins in CTE results can create lateral joins that are not supported
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SELECT raise_failed_execution_cte($$
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WITH cte AS (
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SELECT user_id, value_2 FROM users_table WHERE value_2 IN (1, 2)
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)
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INSERT INTO modify_table (SELECT (SELECT value_2 FROM cte GROUP BY value_2));
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$$);
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ERROR: Task failed to execute
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SET client_min_messages TO DEFAULT;
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\set VERBOSITY DEFAULT
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-- CTEs prior to any other modification should error out
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WITH cte AS (
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SELECT value_2 FROM users_table WHERE user_id IN (1, 2, 3)
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)
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DELETE FROM modify_table WHERE id IN (SELECT value_2 FROM cte);
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WITH cte AS (
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SELECT value_2 FROM users_table WHERE user_id IN (1, 2, 3)
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)
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UPDATE modify_table SET val=-1 WHERE val IN (SELECT * FROM cte);
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WITH user_data AS (
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SELECT user_id, value_2 FROM users_table
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)
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INSERT INTO modify_table SELECT * FROM user_data;
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WITH raw_data AS (
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DELETE FROM modify_table RETURNING *
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)
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INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
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SELECT * FROM summary_table ORDER BY id;
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id | counter
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----+---------
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2 | 20
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3 | 38
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4 | 24
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5 | 27
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(4 rows)
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SELECT COUNT(*) FROM modify_table;
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count
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-------
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0
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(1 row)
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INSERT INTO modify_table VALUES (1,1), (2, 2), (3,3);
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WITH raw_data AS (
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DELETE FROM modify_table RETURNING *
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)
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INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 1
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2 | 1
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2 | 20
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3 | 1
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3 | 38
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4 | 24
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5 | 27
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(7 rows)
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SELECT COUNT(*) FROM modify_table;
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count
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-------
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0
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(1 row)
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WITH insert_reference AS (
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INSERT INTO anchor_table VALUES (1), (2) RETURNING *
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)
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SELECT id FROM insert_reference ORDER BY id;
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id
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----
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1
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2
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(2 rows)
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WITH anchor_data AS (
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SELECT * FROM anchor_table
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),
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raw_data AS (
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DELETE FROM modify_table RETURNING *
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),
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summary_data AS (
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DELETE FROM summary_table RETURNING *
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)
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INSERT INTO
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summary_table
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SELECT id, SUM(counter) FROM (
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(SELECT raw_data.id, COUNT(*) AS counter FROM raw_data, anchor_data
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WHERE raw_data.id = anchor_data.id GROUP BY raw_data.id)
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UNION ALL
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(SELECT * FROM summary_data)) AS all_rows
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GROUP BY
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id;
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SELECT COUNT(*) FROM modify_table;
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count
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-------
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0
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(1 row)
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 1
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2 | 21
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3 | 39
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4 | 24
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5 | 27
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(5 rows)
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WITH added_data AS (
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INSERT INTO modify_table VALUES (1,2), (1,6), (2,4), (3,6) RETURNING *
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),
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raw_data AS (
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DELETE FROM modify_table WHERE id = 1 AND val = (SELECT MAX(val) FROM added_data) RETURNING *
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)
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INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
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SELECT COUNT(*) FROM modify_table;
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count
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-------
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3
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(1 row)
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 1
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1 | 1
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2 | 21
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3 | 39
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4 | 24
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5 | 27
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(6 rows)
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-- Merge rows in the summary_table
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WITH summary_data AS (
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DELETE FROM summary_table RETURNING *
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)
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INSERT INTO summary_table SELECT id, SUM(counter) AS counter FROM summary_data GROUP BY id;
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 2
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2 | 21
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3 | 39
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4 | 24
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5 | 27
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(5 rows)
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SELECT * FROM modify_table ORDER BY id, val;
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id | val
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----+-----
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1 | 2
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2 | 4
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3 | 6
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(3 rows)
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SELECT * FROM anchor_table ORDER BY id;
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id
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----
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1
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2
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(2 rows)
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INSERT INTO modify_table VALUES (11, 1), (12, 2), (13, 3);
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WITH select_data AS (
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SELECT * FROM modify_table
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),
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raw_data AS (
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DELETE FROM modify_table WHERE id >= (SELECT min(id) FROM select_data WHERE id > 10) RETURNING *
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)
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INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
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INSERT INTO modify_table VALUES (21, 1), (22, 2), (23, 3);
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-- read ids from the same table
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WITH distinct_ids AS (
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SELECT DISTINCT id FROM modify_table
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),
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update_data AS (
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UPDATE modify_table SET val = 100 WHERE id > 10 AND
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id IN (SELECT * FROM distinct_ids) RETURNING *
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)
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SELECT count(*) FROM update_data;
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count
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-------
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3
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(1 row)
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-- read ids from a different table
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WITH distinct_ids AS (
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SELECT DISTINCT id FROM summary_table
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),
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update_data AS (
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UPDATE modify_table SET val = 100 WHERE id > 10 AND
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id IN (SELECT * FROM distinct_ids) RETURNING *
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)
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SELECT count(*) FROM update_data;
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count
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-------
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0
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(1 row)
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-- test update with generate series
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UPDATE modify_table SET val = 200 WHERE id > 10 AND
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id IN (SELECT 2*s FROM generate_series(1,20) s);
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-- test update with generate series in CTE
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WITH update_data AS (
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UPDATE modify_table SET val = 300 WHERE id > 10 AND
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id IN (SELECT 3*s FROM generate_series(1,20) s) RETURNING *
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)
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SELECT COUNT(*) FROM update_data;
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count
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-------
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1
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(1 row)
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WITH delete_rows AS (
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DELETE FROM modify_table WHERE id > 10 RETURNING *
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)
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SELECT * FROM delete_rows ORDER BY id, val;
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id | val
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----+-----
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21 | 300
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22 | 200
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23 | 100
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(3 rows)
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WITH delete_rows AS (
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DELETE FROM summary_table WHERE id > 10 RETURNING *
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)
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SELECT * FROM delete_rows ORDER BY id, counter;
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id | counter
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----+---------
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11 | 1
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12 | 1
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13 | 1
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(3 rows)
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-- Check modifiying CTEs inside a transaction
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BEGIN;
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WITH raw_data AS (
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DELETE FROM modify_table RETURNING *
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)
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INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
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WITH insert_reference AS (
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INSERT INTO anchor_table VALUES (3), (4) RETURNING *
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)
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SELECT id FROM insert_reference ORDER BY id;
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id
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----
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3
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4
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(2 rows)
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 1
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1 | 2
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2 | 1
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2 | 21
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3 | 1
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3 | 39
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4 | 24
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5 | 27
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(8 rows)
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SELECT * FROM modify_table ORDER BY id, val;
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id | val
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----+-----
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(0 rows)
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SELECT * FROM anchor_table ORDER BY id;
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id
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----
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1
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2
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3
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4
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(4 rows)
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ROLLBACK;
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SELECT * FROM summary_table ORDER BY id, counter;
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id | counter
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----+---------
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1 | 2
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2 | 21
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3 | 39
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4 | 24
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5 | 27
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(5 rows)
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SELECT * FROM modify_table ORDER BY id, val;
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id | val
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----+-----
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1 | 2
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2 | 4
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3 | 6
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(3 rows)
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SELECT * FROM anchor_table ORDER BY id;
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id
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----
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1
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2
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(2 rows)
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-- Test delete with subqueries
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WITH deleted_rows AS (
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DELETE FROM modify_table WHERE id IN (SELECT id FROM modify_table WHERE id = 1) RETURNING *
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)
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SELECT * FROM deleted_rows;
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id | val
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----+-----
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1 | 2
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(1 row)
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WITH deleted_rows AS (
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DELETE FROM modify_table WHERE id IN (SELECT id FROM modify_table WHERE val = 4) RETURNING *
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)
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SELECT * FROM deleted_rows;
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id | val
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----+-----
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2 | 4
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(1 row)
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WITH select_rows AS (
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SELECT id FROM modify_table WHERE val = 4
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),
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deleted_rows AS (
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DELETE FROM modify_table WHERE id IN (SELECT id FROM select_rows) RETURNING *
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)
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SELECT * FROM deleted_rows;
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id | val
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----+-----
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(0 rows)
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WITH deleted_rows AS (
|
|
DELETE FROM modify_table WHERE val IN (SELECT val FROM modify_table WHERE id = 3) RETURNING *
|
|
)
|
|
SELECT * FROM deleted_rows;
|
|
id | val
|
|
----+-----
|
|
3 | 6
|
|
(1 row)
|
|
|
|
WITH select_rows AS (
|
|
SELECT val FROM modify_table WHERE id = 3
|
|
),
|
|
deleted_rows AS (
|
|
DELETE FROM modify_table WHERE val IN (SELECT val FROM select_rows) RETURNING *
|
|
)
|
|
SELECT * FROM deleted_rows;
|
|
id | val
|
|
----+-----
|
|
(0 rows)
|
|
|
|
WITH deleted_rows AS (
|
|
DELETE FROM modify_table WHERE ctid IN (SELECT ctid FROM modify_table WHERE id = 1) RETURNING *
|
|
)
|
|
SELECT * FROM deleted_rows;
|
|
ERROR: cannot perform distributed planning for the given modification
|
|
DETAIL: Recursively planned distributed modifications with ctid on where clause are not supported.
|
|
WITH select_rows AS (
|
|
SELECT ctid FROM modify_table WHERE id = 1
|
|
),
|
|
deleted_rows AS (
|
|
DELETE FROM modify_table WHERE ctid IN (SELECT ctid FROM select_rows) RETURNING *
|
|
)
|
|
SELECT * FROM deleted_rows;
|
|
ERROR: cannot perform distributed planning for the given modification
|
|
DETAIL: Recursively planned distributed modifications with ctid on where clause are not supported.
|
|
WITH added_data AS (
|
|
INSERT INTO modify_table VALUES (1,2), (1,6) RETURNING *
|
|
),
|
|
select_data AS (
|
|
SELECT * FROM added_data WHERE id = 1
|
|
),
|
|
raw_data AS (
|
|
DELETE FROM modify_table WHERE id = 1 AND ctid IN (SELECT ctid FROM select_data) RETURNING val
|
|
)
|
|
SELECT * FROM raw_data ORDER BY val;
|
|
ERROR: cannot perform distributed planning for the given modification
|
|
DETAIL: Recursively planned distributed modifications with ctid on where clause are not supported.
|
|
WITH added_data AS (
|
|
INSERT INTO modify_table VALUES (1, trunc(10 * random())), (1, trunc(random())) RETURNING *
|
|
),
|
|
select_data AS (
|
|
SELECT val, now() FROM added_data WHERE id = 1
|
|
),
|
|
raw_data AS (
|
|
DELETE FROM modify_table WHERE id = 1 AND val IN (SELECT val FROM select_data) RETURNING *
|
|
)
|
|
SELECT COUNT(*) FROM raw_data;
|
|
count
|
|
-------
|
|
2
|
|
(1 row)
|
|
|
|
INSERT INTO modify_table VALUES (1,2), (1,6), (2, 3), (3, 5);
|
|
WITH select_data AS (
|
|
SELECT * FROM modify_table
|
|
),
|
|
raw_data AS (
|
|
DELETE FROM modify_table WHERE id IN (SELECT id FROM select_data WHERE val > 5) RETURNING id, val
|
|
)
|
|
SELECT * FROM raw_data ORDER BY val;
|
|
id | val
|
|
----+-----
|
|
1 | 2
|
|
1 | 6
|
|
(2 rows)
|
|
|
|
WITH select_data AS (
|
|
SELECT * FROM modify_table
|
|
),
|
|
raw_data AS (
|
|
UPDATE modify_table SET val = 0 WHERE id IN (SELECT id FROM select_data WHERE val < 5) RETURNING id, val
|
|
)
|
|
SELECT * FROM raw_data ORDER BY val;
|
|
id | val
|
|
----+-----
|
|
2 | 0
|
|
(1 row)
|
|
|
|
SELECT * FROM modify_table ORDER BY id, val;
|
|
id | val
|
|
----+-----
|
|
2 | 0
|
|
3 | 5
|
|
(2 rows)
|
|
|
|
-- Test with joins
|
|
WITH select_data AS (
|
|
SELECT * FROM modify_table
|
|
),
|
|
raw_data AS (
|
|
UPDATE modify_table SET val = 0 WHERE
|
|
id IN (SELECT id FROM select_data) AND
|
|
val IN (SELECT counter FROM summary_table)
|
|
RETURNING id, val
|
|
)
|
|
SELECT * FROM raw_data ORDER BY val;
|
|
id | val
|
|
----+-----
|
|
(0 rows)
|
|
|
|
-- Test with replication factor 2
|
|
SET citus.shard_replication_factor to 2;
|
|
DROP TABLE modify_table;
|
|
CREATE TABLE with_modifying.modify_table (id int, val int);
|
|
SELECT create_distributed_table('modify_table', 'id');
|
|
create_distributed_table
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
INSERT INTO with_modifying.modify_table SELECT user_id, value_1 FROM public.users_table;
|
|
DROP TABLE summary_table;
|
|
CREATE TABLE with_modifying.summary_table (id int, counter int);
|
|
SELECT create_distributed_table('summary_table', 'id');
|
|
create_distributed_table
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT COUNT(*) FROM modify_table;
|
|
count
|
|
-------
|
|
107
|
|
(1 row)
|
|
|
|
SELECT * FROM summary_table ORDER BY id, counter;
|
|
id | counter
|
|
----+---------
|
|
(0 rows)
|
|
|
|
WITH raw_data AS (
|
|
DELETE FROM modify_table RETURNING *
|
|
)
|
|
INSERT INTO summary_table SELECT id, COUNT(*) AS counter FROM raw_data GROUP BY id;
|
|
SELECT COUNT(*) FROM modify_table;
|
|
count
|
|
-------
|
|
0
|
|
(1 row)
|
|
|
|
SELECT * FROM summary_table ORDER BY id, counter;
|
|
id | counter
|
|
----+---------
|
|
1 | 8
|
|
2 | 19
|
|
3 | 18
|
|
4 | 24
|
|
5 | 27
|
|
6 | 11
|
|
(6 rows)
|
|
|
|
-- make sure that the intermediate result uses a connection
|
|
-- that does not interfere with placement connections
|
|
BEGIN;
|
|
INSERT INTO modify_table (id) VALUES (10000);
|
|
WITH test_cte AS (SELECT count(*) FROM modify_table) SELECT * FROM test_cte;
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
ROLLBACK;
|
|
-- similarly, make sure that the intermediate result uses a seperate connection
|
|
WITH first_query AS (INSERT INTO modify_table (id) VALUES (10001)),
|
|
second_query AS (SELECT * FROM modify_table) SELECT count(*) FROM second_query;
|
|
count
|
|
-------
|
|
1
|
|
(1 row)
|
|
|
|
DROP SCHEMA with_modifying CASCADE;
|
|
NOTICE: drop cascades to 5 other objects
|
|
DETAIL: drop cascades to table users_table
|
|
drop cascades to table anchor_table
|
|
drop cascades to function raise_failed_execution_cte(text)
|
|
drop cascades to table modify_table
|
|
drop cascades to table summary_table
|