mirror of https://github.com/citusdata/citus.git
183 lines
2.9 KiB
Plaintext
183 lines
2.9 KiB
Plaintext
-- More complex CTEs in WHERE
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SET citus.enable_repartition_joins TO on;
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-- CTE in WHERE basic
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WITH events AS (
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SELECT
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event_type
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FROM
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events_table
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WHERE
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user_id < 5
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GROUP BY
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event_type
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ORDER BY
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event_type
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LIMIT 10
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)
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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event_type
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IN
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(SELECT
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event_type
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FROM
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events);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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WITH users AS (
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SELECT
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events_table.user_id
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FROM
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events_table, users_table
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WHERE
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events_table.user_id = users_table.user_id
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GROUP BY
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1
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ORDER BY
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1
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LIMIT 10
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)
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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user_id IN
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(
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SELECT
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*
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FROM
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users
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);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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WITH users AS (
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SELECT
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events_table.user_id
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FROM
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events_table, users_table
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WHERE
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events_table.user_id = users_table.user_id
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GROUP BY
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1
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ORDER BY
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1
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LIMIT 10
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)
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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user_id IN
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(
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SELECT
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*
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FROM
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users
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);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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-- CTE with non-colocated join in WHERE
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WITH users AS (
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SELECT
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events_table.user_id
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FROM
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events_table, users_table
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WHERE
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events_table.value_2 = users_table.value_2
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GROUP BY
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1
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ORDER BY
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1
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LIMIT 10
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)
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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user_id IN
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(
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SELECT
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*
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FROM
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users
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);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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-- CTE in WHERE basic
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-- this is a tricky query that hits an aggresive
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-- check in subquery puwhdown after the recursive planning
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-- where LIMIT should be allowed
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-- if the query contains only intermediate results
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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event_type
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IN
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(WITH events AS (
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SELECT
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event_type
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FROM
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events_table
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WHERE user_id < 5
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GROUP BY
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1
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ORDER BY
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1)
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SELECT * FROM events LIMIT 10
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);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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-- CTE with non-colocated join in WHERE
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-- this is a tricky query that hits an aggresive
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-- check in subquery puwhdown after the recursive planning
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-- where LIMIT should be allowed
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-- if the query contains only intermediate results
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SELECT
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count(*)
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FROM
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events_table
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WHERE
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user_id IN
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(WITH users AS
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(SELECT
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events_table.user_id
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FROM
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events_table, users_table
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WHERE
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events_table.value_2 = users_table.value_2
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GROUP BY
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1
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ORDER BY
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1
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)
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SELECT * FROM users LIMIT 10
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);
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count
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---------------------------------------------------------------------
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101
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(1 row)
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