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85 lines
2.8 KiB
SQL
85 lines
2.8 KiB
SQL
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/**
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* Based on https://github.com/postgres/postgres/blob/master/src/test/regress/sql/with.sql, license:
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*
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* PostgreSQL Database Management System
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* (formerly known as Postgres, then as Postgres95)
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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*
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* Portions Copyright (c) 1994, The Regents of the University of California
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose, without fee, and without a written agreement
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* is hereby granted, provided that the above copyright notice and this
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* paragraph and the following two paragraphs appear in all copies.
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*
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* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
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* LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
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* DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO
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*PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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--
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-- Tests for common table expressions (WITH query, ... SELECT ...)
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--
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-- { echoOn }
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SET allow_experimental_analyzer = 1;
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--
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-- test multiple WITH queries
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--
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WITH RECURSIVE
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y AS (SELECT 1 AS id),
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x AS (SELECT * FROM y UNION ALL SELECT id+1 FROM x WHERE id < 5)
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SELECT * FROM x ORDER BY id;
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-- forward reference OK
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WITH RECURSIVE
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x AS (SELECT * FROM y UNION ALL SELECT id+1 FROM x WHERE id < 5),
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y AS (SELECT 1 AS id)
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SELECT * FROM x ORDER BY id;
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WITH RECURSIVE
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x AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 5),
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y AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM y WHERE id < 10)
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SELECT y.*, x.* FROM y LEFT JOIN x USING (id) ORDER BY y.id;
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WITH RECURSIVE
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x AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 5),
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y AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 10)
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SELECT y.*, x.* FROM y LEFT JOIN x USING (id) ORDER BY y.id;
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WITH RECURSIVE
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x AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 3 ),
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y AS
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(SELECT * FROM x UNION ALL SELECT * FROM x),
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z AS
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(SELECT * FROM x UNION ALL SELECT id+1 FROM z WHERE id < 10)
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SELECT * FROM z ORDER BY id;
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WITH RECURSIVE
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x AS
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(SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 3 ),
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y AS
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(SELECT * FROM x UNION ALL SELECT * FROM x),
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z AS
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(SELECT * FROM y UNION ALL SELECT id+1 FROM z WHERE id < 10)
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SELECT * FROM z ORDER BY id;
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-- { echoOff }
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