ClickHouse/tests/queries/0_stateless/03040_recursive_cte_postgres_6.sql

/**
  * Based on https://github.com/postgres/postgres/blob/master/src/test/regress/sql/with.sql, license:
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--
-- Tests for common table expressions (WITH query, ... SELECT ...)
--

-- { echoOn }

SET allow_experimental_analyzer = 1;

--
-- error cases
--

-- INTERSECT
WITH RECURSIVE x AS (SELECT 1 AS n INTERSECT SELECT n+1 FROM x)
    SELECT * FROM x; -- {serverError UNSUPPORTED_METHOD}

WITH RECURSIVE x AS (SELECT 1 AS n INTERSECT ALL SELECT n+1 FROM x)
    SELECT * FROM x; -- {serverError UNSUPPORTED_METHOD}

-- EXCEPT
WITH RECURSIVE x AS (SELECT 1 AS n EXCEPT SELECT n+1 FROM x)
    SELECT * FROM x; -- {serverError UNSUPPORTED_METHOD}

WITH RECURSIVE x AS (SELECT 1 AS n EXCEPT ALL SELECT n+1 FROM x)
    SELECT * FROM x; -- {serverError UNSUPPORTED_METHOD}

-- no non-recursive term
WITH RECURSIVE x AS (SELECT n FROM x)
    SELECT * FROM x; -- {serverError UNKNOWN_TABLE}

-- recursive term in the left hand side (strictly speaking, should allow this)
WITH RECURSIVE x AS (SELECT n FROM x UNION ALL SELECT 1 AS n)
    SELECT * FROM x; -- {serverError UNKNOWN_TABLE}

DROP TABLE IF EXISTS y;
CREATE TABLE y (a UInt64) ENGINE=TinyLog;
INSERT INTO y SELECT * FROM numbers(1, 10);

-- LEFT JOIN

WITH RECURSIVE x AS (SELECT a AS n FROM y WHERE a = 1
    UNION ALL
    SELECT x.n+1 FROM y LEFT JOIN x ON x.n = y.a WHERE n < 10)
SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- RIGHT JOIN
WITH RECURSIVE x AS (SELECT a AS n FROM y WHERE a = 1
    UNION ALL
    SELECT x.n+1 FROM x RIGHT JOIN y ON x.n = y.a WHERE n < 10)
SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- FULL JOIN
WITH RECURSIVE x AS (SELECT a AS n FROM y WHERE a = 1
    UNION ALL
    SELECT x.n+1 FROM x FULL JOIN y ON x.n = y.a WHERE n < 10)
SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- subquery
WITH RECURSIVE x AS (SELECT 1 AS n UNION ALL SELECT n+1 FROM x
                          WHERE n IN (SELECT * FROM x))
  SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- aggregate functions
WITH RECURSIVE x AS (SELECT 1 AS n UNION ALL SELECT count(*) FROM x)
  SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

WITH RECURSIVE x AS (SELECT 1 AS n UNION ALL SELECT sum(n) FROM x)
  SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- ORDER BY
WITH RECURSIVE x AS (SELECT 1 AS n UNION ALL SELECT n+1 FROM x ORDER BY 1)
  SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- target list has a recursive query name
WITH RECURSIVE x AS (SELECT 1 AS id
    UNION ALL
    SELECT (SELECT * FROM x) FROM x WHERE id < 5
) SELECT * FROM x; -- { serverError UNKNOWN_TABLE }

-- mutual recursive query (not implemented)
WITH RECURSIVE
  x AS (SELECT 1 AS id UNION ALL SELECT id+1 FROM y WHERE id < 5),
  y AS (SELECT 1 AS id UNION ALL SELECT id+1 FROM x WHERE id < 5)
SELECT * FROM x FORMAT NULL SETTINGS max_recursive_cte_evaluation_depth = 5; -- { serverError TOO_DEEP_RECURSION }

-- { echoOff }