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96 lines
2.7 KiB
SQL
96 lines
2.7 KiB
SQL
/**
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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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-- WITH RECURSIVE
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-- sum of 1..100
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WITH RECURSIVE t AS (
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SELECT 1 AS n
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UNION ALL
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SELECT n+1 FROM t WHERE n < 100
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)
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SELECT sum(n) FROM t;
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WITH RECURSIVE t AS (
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SELECT 1 AS n
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UNION ALL
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SELECT n+1 FROM t WHERE n < 5
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)
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SELECT * FROM t;
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-- This'd be an infinite loop, but outside query reads only as much as needed
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WITH RECURSIVE t AS (
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SELECT 1 AS n
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UNION ALL
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SELECT n+1 FROM t)
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SELECT * FROM t LIMIT 10;
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WITH RECURSIVE t AS (
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SELECT 'foo' AS n
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UNION ALL
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SELECT n || ' bar' FROM t WHERE length(n) < 20
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)
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SELECT n, toTypeName(n) FROM t;
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WITH RECURSIVE t AS (
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SELECT '7' AS n
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UNION ALL
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SELECT n+1 FROM t WHERE n < 10
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)
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SELECT n, toTypeName(n) FROM t; -- { serverError ILLEGAL_TYPE_OF_ARGUMENT }
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-- Deeply nested WITH caused a list-munging problem in v13
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-- Detection of cross-references and self-references
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WITH RECURSIVE w1 AS
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(WITH w2 AS
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(WITH w3 AS
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(WITH w4 AS
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(WITH w5 AS
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(WITH RECURSIVE w6 AS
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(WITH w7 AS
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(WITH w8 AS
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(SELECT 1)
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SELECT * FROM w8)
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SELECT * FROM w7)
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SELECT * FROM w6)
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SELECT * FROM w5)
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SELECT * FROM w4)
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SELECT * FROM w3)
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SELECT * FROM w2)
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SELECT * FROM w1;
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-- { echoOff }
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