ClickHouse/tests/queries/0_stateless/03041_recursive_cte_postgres_7.reference
2024-04-28 12:52:17 +03:00

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/**
* Based on https://github.com/postgres/postgres/blob/master/src/test/regress/sql/with.sql, license:
*
* PostgreSQL Database Management System
* (formerly known as Postgres, then as Postgres95)
*
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
*
* Portions Copyright (c) 1994, The Regents of the University of California
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose, without fee, and without a written agreement
* is hereby granted, provided that the above copyright notice and this
* paragraph and the following two paragraphs appear in all copies.
*
* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
* LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
* DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
*PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
--
-- Tests for common table expressions (WITH query, ... SELECT ...)
--
-- { echoOn }
SET allow_experimental_analyzer = 1;
WITH RECURSIVE foo AS
(SELECT 1 AS i
UNION ALL
(SELECT i+1 FROM foo WHERE i < 10
UNION ALL
SELECT i+1 FROM foo WHERE i < 5)
) SELECT * FROM foo;
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WITH RECURSIVE foo AS
(SELECT 1 AS i
UNION ALL
SELECT * FROM
(SELECT i+1 FROM foo WHERE i < 10
UNION ALL
SELECT i+1 FROM foo WHERE i < 5) AS t
) SELECT * FROM foo;
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WITH RECURSIVE foo AS
(SELECT 1 AS i
UNION ALL
(SELECT i+1 FROM foo WHERE i < 10
EXCEPT
SELECT i+1 FROM foo WHERE i < 5)
) SELECT * FROM foo;
1
WITH RECURSIVE foo AS
(SELECT 1 AS i
UNION ALL
(SELECT i+1 FROM foo WHERE i < 10
INTERSECT
SELECT i+1 FROM foo WHERE i < 5)
) SELECT * FROM foo;
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--
-- test for nested-recursive-WITH bug
--
WITH RECURSIVE t AS (
WITH RECURSIVE s AS (
SELECT toUInt64(1) AS i
UNION ALL
SELECT i+1 FROM s WHERE i < 10
)
SELECT i AS j FROM s
UNION ALL
SELECT j+1 FROM t WHERE j < 10
)
SELECT * FROM t;
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--
-- Test CTEs read in non-initialization orders
--
WITH RECURSIVE
tab AS (SELECT * FROM values('id_key UInt64, link UInt64', (1,17), (2,17), (3,17), (4,17), (6,17), (5,17))),
iter AS (
SELECT 0 AS id_key, 'base' AS row_type, 17 AS link
UNION ALL (
WITH remaining AS (
SELECT tab.id_key AS id_key, 'true'::text AS row_type, iter.link AS link, MIN(tab.id_key) OVER () AS min
FROM tab INNER JOIN iter USING (link)
WHERE tab.id_key > iter.id_key
),
first_remaining AS (
SELECT id_key, row_type, link
FROM remaining
WHERE id_key=min
),
effect AS (
SELECT tab.id_key AS id_key, 'new'::text AS row_type, tab.link AS link
FROM first_remaining e INNER JOIN tab ON e.id_key=tab.id_key
WHERE e.row_type = 'false'
)
SELECT * FROM first_remaining
UNION ALL SELECT * FROM effect
)
)
SELECT * FROM iter;
0 base 17
1 true 17
2 true 17
3 true 17
4 true 17
5 true 17
6 true 17