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postgresql/src/test/regress/expected/join.out

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--
-- JOIN
-- Test JOIN clauses
--
CREATE TABLE J1_TBL (
i integer,
j integer,
t text
);
CREATE TABLE J2_TBL (
i integer,
k integer
);
INSERT INTO J1_TBL VALUES (1, 4, 'one');
INSERT INTO J1_TBL VALUES (2, 3, 'two');
INSERT INTO J1_TBL VALUES (3, 2, 'three');
INSERT INTO J1_TBL VALUES (4, 1, 'four');
INSERT INTO J1_TBL VALUES (5, 0, 'five');
INSERT INTO J1_TBL VALUES (6, 6, 'six');
INSERT INTO J1_TBL VALUES (7, 7, 'seven');
INSERT INTO J1_TBL VALUES (8, 8, 'eight');
INSERT INTO J1_TBL VALUES (0, NULL, 'zero');
INSERT INTO J1_TBL VALUES (NULL, NULL, 'null');
INSERT INTO J1_TBL VALUES (NULL, 0, 'zero');
INSERT INTO J2_TBL VALUES (1, -1);
INSERT INTO J2_TBL VALUES (2, 2);
INSERT INTO J2_TBL VALUES (3, -3);
INSERT INTO J2_TBL VALUES (2, 4);
INSERT INTO J2_TBL VALUES (5, -5);
INSERT INTO J2_TBL VALUES (5, -5);
INSERT INTO J2_TBL VALUES (0, NULL);
INSERT INTO J2_TBL VALUES (NULL, NULL);
INSERT INTO J2_TBL VALUES (NULL, 0);
--
-- CORRELATION NAMES
-- Make sure that table/column aliases are supported
-- before diving into more complex join syntax.
--
SELECT '' AS "xxx", *
FROM J1_TBL AS tx;
xxx | i | j | t
-----+---+---+-------
| 1 | 4 | one
| 2 | 3 | two
| 3 | 2 | three
| 4 | 1 | four
| 5 | 0 | five
| 6 | 6 | six
| 7 | 7 | seven
| 8 | 8 | eight
| 0 | | zero
| | | null
| | 0 | zero
(11 rows)
SELECT '' AS "xxx", *
FROM J1_TBL tx;
xxx | i | j | t
-----+---+---+-------
| 1 | 4 | one
| 2 | 3 | two
| 3 | 2 | three
| 4 | 1 | four
| 5 | 0 | five
| 6 | 6 | six
| 7 | 7 | seven
| 8 | 8 | eight
| 0 | | zero
| | | null
| | 0 | zero
(11 rows)
SELECT '' AS "xxx", *
FROM J1_TBL AS t1 (a, b, c);
xxx | a | b | c
-----+---+---+-------
| 1 | 4 | one
| 2 | 3 | two
| 3 | 2 | three
| 4 | 1 | four
| 5 | 0 | five
| 6 | 6 | six
| 7 | 7 | seven
| 8 | 8 | eight
| 0 | | zero
| | | null
| | 0 | zero
(11 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c);
xxx | a | b | c
-----+---+---+-------
| 1 | 4 | one
| 2 | 3 | two
| 3 | 2 | three
| 4 | 1 | four
| 5 | 0 | five
| 6 | 6 | six
| 7 | 7 | seven
| 8 | 8 | eight
| 0 | | zero
| | | null
| | 0 | zero
(11 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c), J2_TBL t2 (d, e);
xxx | a | b | c | d | e
-----+---+---+-------+---+----
| 1 | 4 | one | 1 | -1
| 2 | 3 | two | 1 | -1
| 3 | 2 | three | 1 | -1
| 4 | 1 | four | 1 | -1
| 5 | 0 | five | 1 | -1
| 6 | 6 | six | 1 | -1
| 7 | 7 | seven | 1 | -1
| 8 | 8 | eight | 1 | -1
| 0 | | zero | 1 | -1
| | | null | 1 | -1
| | 0 | zero | 1 | -1
| 1 | 4 | one | 2 | 2
| 2 | 3 | two | 2 | 2
| 3 | 2 | three | 2 | 2
| 4 | 1 | four | 2 | 2
| 5 | 0 | five | 2 | 2
| 6 | 6 | six | 2 | 2
| 7 | 7 | seven | 2 | 2
| 8 | 8 | eight | 2 | 2
| 0 | | zero | 2 | 2
| | | null | 2 | 2
| | 0 | zero | 2 | 2
| 1 | 4 | one | 3 | -3
| 2 | 3 | two | 3 | -3
| 3 | 2 | three | 3 | -3
| 4 | 1 | four | 3 | -3
| 5 | 0 | five | 3 | -3
| 6 | 6 | six | 3 | -3
| 7 | 7 | seven | 3 | -3
| 8 | 8 | eight | 3 | -3
| 0 | | zero | 3 | -3
| | | null | 3 | -3
| | 0 | zero | 3 | -3
| 1 | 4 | one | 2 | 4
| 2 | 3 | two | 2 | 4
| 3 | 2 | three | 2 | 4
| 4 | 1 | four | 2 | 4
| 5 | 0 | five | 2 | 4
| 6 | 6 | six | 2 | 4
| 7 | 7 | seven | 2 | 4
| 8 | 8 | eight | 2 | 4
| 0 | | zero | 2 | 4
| | | null | 2 | 4
| | 0 | zero | 2 | 4
| 1 | 4 | one | 5 | -5
| 2 | 3 | two | 5 | -5
| 3 | 2 | three | 5 | -5
| 4 | 1 | four | 5 | -5
| 5 | 0 | five | 5 | -5
| 6 | 6 | six | 5 | -5
| 7 | 7 | seven | 5 | -5
| 8 | 8 | eight | 5 | -5
| 0 | | zero | 5 | -5
| | | null | 5 | -5
| | 0 | zero | 5 | -5
| 1 | 4 | one | 5 | -5
| 2 | 3 | two | 5 | -5
| 3 | 2 | three | 5 | -5
| 4 | 1 | four | 5 | -5
| 5 | 0 | five | 5 | -5
| 6 | 6 | six | 5 | -5
| 7 | 7 | seven | 5 | -5
| 8 | 8 | eight | 5 | -5
| 0 | | zero | 5 | -5
| | | null | 5 | -5
| | 0 | zero | 5 | -5
| 1 | 4 | one | 0 |
| 2 | 3 | two | 0 |
| 3 | 2 | three | 0 |
| 4 | 1 | four | 0 |
| 5 | 0 | five | 0 |
| 6 | 6 | six | 0 |
| 7 | 7 | seven | 0 |
| 8 | 8 | eight | 0 |
| 0 | | zero | 0 |
| | | null | 0 |
| | 0 | zero | 0 |
| 1 | 4 | one | |
| 2 | 3 | two | |
| 3 | 2 | three | |
| 4 | 1 | four | |
| 5 | 0 | five | |
| 6 | 6 | six | |
| 7 | 7 | seven | |
| 8 | 8 | eight | |
| 0 | | zero | |
| | | null | |
| | 0 | zero | |
| 1 | 4 | one | | 0
| 2 | 3 | two | | 0
| 3 | 2 | three | | 0
| 4 | 1 | four | | 0
| 5 | 0 | five | | 0
| 6 | 6 | six | | 0
| 7 | 7 | seven | | 0
| 8 | 8 | eight | | 0
| 0 | | zero | | 0
| | | null | | 0
| | 0 | zero | | 0
(99 rows)
SELECT '' AS "xxx", t1.a, t2.e
FROM J1_TBL t1 (a, b, c), J2_TBL t2 (d, e)
WHERE t1.a = t2.d;
xxx | a | e
-----+---+----
| 0 |
| 1 | -1
| 2 | 2
| 2 | 4
| 3 | -3
| 5 | -5
| 5 | -5
(7 rows)
--
-- CROSS JOIN
-- Qualifications are not allowed on cross joins,
-- which degenerate into a standard unqualified inner join.
--
SELECT '' AS "xxx", *
FROM J1_TBL CROSS JOIN J2_TBL;
xxx | i | j | t | i | k
-----+---+---+-------+---+----
| 1 | 4 | one | 1 | -1
| 2 | 3 | two | 1 | -1
| 3 | 2 | three | 1 | -1
| 4 | 1 | four | 1 | -1
| 5 | 0 | five | 1 | -1
| 6 | 6 | six | 1 | -1
| 7 | 7 | seven | 1 | -1
| 8 | 8 | eight | 1 | -1
| 0 | | zero | 1 | -1
| | | null | 1 | -1
| | 0 | zero | 1 | -1
| 1 | 4 | one | 2 | 2
| 2 | 3 | two | 2 | 2
| 3 | 2 | three | 2 | 2
| 4 | 1 | four | 2 | 2
| 5 | 0 | five | 2 | 2
| 6 | 6 | six | 2 | 2
| 7 | 7 | seven | 2 | 2
| 8 | 8 | eight | 2 | 2
| 0 | | zero | 2 | 2
| | | null | 2 | 2
| | 0 | zero | 2 | 2
| 1 | 4 | one | 3 | -3
| 2 | 3 | two | 3 | -3
| 3 | 2 | three | 3 | -3
| 4 | 1 | four | 3 | -3
| 5 | 0 | five | 3 | -3
| 6 | 6 | six | 3 | -3
| 7 | 7 | seven | 3 | -3
| 8 | 8 | eight | 3 | -3
| 0 | | zero | 3 | -3
| | | null | 3 | -3
| | 0 | zero | 3 | -3
| 1 | 4 | one | 2 | 4
| 2 | 3 | two | 2 | 4
| 3 | 2 | three | 2 | 4
| 4 | 1 | four | 2 | 4
| 5 | 0 | five | 2 | 4
| 6 | 6 | six | 2 | 4
| 7 | 7 | seven | 2 | 4
| 8 | 8 | eight | 2 | 4
| 0 | | zero | 2 | 4
| | | null | 2 | 4
| | 0 | zero | 2 | 4
| 1 | 4 | one | 5 | -5
| 2 | 3 | two | 5 | -5
| 3 | 2 | three | 5 | -5
| 4 | 1 | four | 5 | -5
| 5 | 0 | five | 5 | -5
| 6 | 6 | six | 5 | -5
| 7 | 7 | seven | 5 | -5
| 8 | 8 | eight | 5 | -5
| 0 | | zero | 5 | -5
| | | null | 5 | -5
| | 0 | zero | 5 | -5
| 1 | 4 | one | 5 | -5
| 2 | 3 | two | 5 | -5
| 3 | 2 | three | 5 | -5
| 4 | 1 | four | 5 | -5
| 5 | 0 | five | 5 | -5
| 6 | 6 | six | 5 | -5
| 7 | 7 | seven | 5 | -5
| 8 | 8 | eight | 5 | -5
| 0 | | zero | 5 | -5
| | | null | 5 | -5
| | 0 | zero | 5 | -5
| 1 | 4 | one | 0 |
| 2 | 3 | two | 0 |
| 3 | 2 | three | 0 |
| 4 | 1 | four | 0 |
| 5 | 0 | five | 0 |
| 6 | 6 | six | 0 |
| 7 | 7 | seven | 0 |
| 8 | 8 | eight | 0 |
| 0 | | zero | 0 |
| | | null | 0 |
| | 0 | zero | 0 |
| 1 | 4 | one | |
| 2 | 3 | two | |
| 3 | 2 | three | |
| 4 | 1 | four | |
| 5 | 0 | five | |
| 6 | 6 | six | |
| 7 | 7 | seven | |
| 8 | 8 | eight | |
| 0 | | zero | |
| | | null | |
| | 0 | zero | |
| 1 | 4 | one | | 0
| 2 | 3 | two | | 0
| 3 | 2 | three | | 0
| 4 | 1 | four | | 0
| 5 | 0 | five | | 0
| 6 | 6 | six | | 0
| 7 | 7 | seven | | 0
| 8 | 8 | eight | | 0
| 0 | | zero | | 0
| | | null | | 0
| | 0 | zero | | 0
(99 rows)
-- ambiguous column
SELECT '' AS "xxx", i, k, t
FROM J1_TBL CROSS JOIN J2_TBL;
ERROR: column reference "i" is ambiguous
LINE 1: SELECT '' AS "xxx", i, k, t
^
-- resolve previous ambiguity by specifying the table name
SELECT '' AS "xxx", t1.i, k, t
FROM J1_TBL t1 CROSS JOIN J2_TBL t2;
xxx | i | k | t
-----+---+----+-------
| 1 | -1 | one
| 2 | -1 | two
| 3 | -1 | three
| 4 | -1 | four
| 5 | -1 | five
| 6 | -1 | six
| 7 | -1 | seven
| 8 | -1 | eight
| 0 | -1 | zero
| | -1 | null
| | -1 | zero
| 1 | 2 | one
| 2 | 2 | two
| 3 | 2 | three
| 4 | 2 | four
| 5 | 2 | five
| 6 | 2 | six
| 7 | 2 | seven
| 8 | 2 | eight
| 0 | 2 | zero
| | 2 | null
| | 2 | zero
| 1 | -3 | one
| 2 | -3 | two
| 3 | -3 | three
| 4 | -3 | four
| 5 | -3 | five
| 6 | -3 | six
| 7 | -3 | seven
| 8 | -3 | eight
| 0 | -3 | zero
| | -3 | null
| | -3 | zero
| 1 | 4 | one
| 2 | 4 | two
| 3 | 4 | three
| 4 | 4 | four
| 5 | 4 | five
| 6 | 4 | six
| 7 | 4 | seven
| 8 | 4 | eight
| 0 | 4 | zero
| | 4 | null
| | 4 | zero
| 1 | -5 | one
| 2 | -5 | two
| 3 | -5 | three
| 4 | -5 | four
| 5 | -5 | five
| 6 | -5 | six
| 7 | -5 | seven
| 8 | -5 | eight
| 0 | -5 | zero
| | -5 | null
| | -5 | zero
| 1 | -5 | one
| 2 | -5 | two
| 3 | -5 | three
| 4 | -5 | four
| 5 | -5 | five
| 6 | -5 | six
| 7 | -5 | seven
| 8 | -5 | eight
| 0 | -5 | zero
| | -5 | null
| | -5 | zero
| 1 | | one
| 2 | | two
| 3 | | three
| 4 | | four
| 5 | | five
| 6 | | six
| 7 | | seven
| 8 | | eight
| 0 | | zero
| | | null
| | | zero
| 1 | | one
| 2 | | two
| 3 | | three
| 4 | | four
| 5 | | five
| 6 | | six
| 7 | | seven
| 8 | | eight
| 0 | | zero
| | | null
| | | zero
| 1 | 0 | one
| 2 | 0 | two
| 3 | 0 | three
| 4 | 0 | four
| 5 | 0 | five
| 6 | 0 | six
| 7 | 0 | seven
| 8 | 0 | eight
| 0 | 0 | zero
| | 0 | null
| | 0 | zero
(99 rows)
SELECT '' AS "xxx", ii, tt, kk
FROM (J1_TBL CROSS JOIN J2_TBL)
AS tx (ii, jj, tt, ii2, kk);
xxx | ii | tt | kk
-----+----+-------+----
| 1 | one | -1
| 2 | two | -1
| 3 | three | -1
| 4 | four | -1
| 5 | five | -1
| 6 | six | -1
| 7 | seven | -1
| 8 | eight | -1
| 0 | zero | -1
| | null | -1
| | zero | -1
| 1 | one | 2
| 2 | two | 2
| 3 | three | 2
| 4 | four | 2
| 5 | five | 2
| 6 | six | 2
| 7 | seven | 2
| 8 | eight | 2
| 0 | zero | 2
| | null | 2
| | zero | 2
| 1 | one | -3
| 2 | two | -3
| 3 | three | -3
| 4 | four | -3
| 5 | five | -3
| 6 | six | -3
| 7 | seven | -3
| 8 | eight | -3
| 0 | zero | -3
| | null | -3
| | zero | -3
| 1 | one | 4
| 2 | two | 4
| 3 | three | 4
| 4 | four | 4
| 5 | five | 4
| 6 | six | 4
| 7 | seven | 4
| 8 | eight | 4
| 0 | zero | 4
| | null | 4
| | zero | 4
| 1 | one | -5
| 2 | two | -5
| 3 | three | -5
| 4 | four | -5
| 5 | five | -5
| 6 | six | -5
| 7 | seven | -5
| 8 | eight | -5
| 0 | zero | -5
| | null | -5
| | zero | -5
| 1 | one | -5
| 2 | two | -5
| 3 | three | -5
| 4 | four | -5
| 5 | five | -5
| 6 | six | -5
| 7 | seven | -5
| 8 | eight | -5
| 0 | zero | -5
| | null | -5
| | zero | -5
| 1 | one |
| 2 | two |
| 3 | three |
| 4 | four |
| 5 | five |
| 6 | six |
| 7 | seven |
| 8 | eight |
| 0 | zero |
| | null |
| | zero |
| 1 | one |
| 2 | two |
| 3 | three |
| 4 | four |
| 5 | five |
| 6 | six |
| 7 | seven |
| 8 | eight |
| 0 | zero |
| | null |
| | zero |
| 1 | one | 0
| 2 | two | 0
| 3 | three | 0
| 4 | four | 0
| 5 | five | 0
| 6 | six | 0
| 7 | seven | 0
| 8 | eight | 0
| 0 | zero | 0
| | null | 0
| | zero | 0
(99 rows)
SELECT '' AS "xxx", tx.ii, tx.jj, tx.kk
FROM (J1_TBL t1 (a, b, c) CROSS JOIN J2_TBL t2 (d, e))
AS tx (ii, jj, tt, ii2, kk);
xxx | ii | jj | kk
-----+----+----+----
| 1 | 4 | -1
| 2 | 3 | -1
| 3 | 2 | -1
| 4 | 1 | -1
| 5 | 0 | -1
| 6 | 6 | -1
| 7 | 7 | -1
| 8 | 8 | -1
| 0 | | -1
| | | -1
| | 0 | -1
| 1 | 4 | 2
| 2 | 3 | 2
| 3 | 2 | 2
| 4 | 1 | 2
| 5 | 0 | 2
| 6 | 6 | 2
| 7 | 7 | 2
| 8 | 8 | 2
| 0 | | 2
| | | 2
| | 0 | 2
| 1 | 4 | -3
| 2 | 3 | -3
| 3 | 2 | -3
| 4 | 1 | -3
| 5 | 0 | -3
| 6 | 6 | -3
| 7 | 7 | -3
| 8 | 8 | -3
| 0 | | -3
| | | -3
| | 0 | -3
| 1 | 4 | 4
| 2 | 3 | 4
| 3 | 2 | 4
| 4 | 1 | 4
| 5 | 0 | 4
| 6 | 6 | 4
| 7 | 7 | 4
| 8 | 8 | 4
| 0 | | 4
| | | 4
| | 0 | 4
| 1 | 4 | -5
| 2 | 3 | -5
| 3 | 2 | -5
| 4 | 1 | -5
| 5 | 0 | -5
| 6 | 6 | -5
| 7 | 7 | -5
| 8 | 8 | -5
| 0 | | -5
| | | -5
| | 0 | -5
| 1 | 4 | -5
| 2 | 3 | -5
| 3 | 2 | -5
| 4 | 1 | -5
| 5 | 0 | -5
| 6 | 6 | -5
| 7 | 7 | -5
| 8 | 8 | -5
| 0 | | -5
| | | -5
| | 0 | -5
| 1 | 4 |
| 2 | 3 |
| 3 | 2 |
| 4 | 1 |
| 5 | 0 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 0 | |
| | |
| | 0 |
| 1 | 4 |
| 2 | 3 |
| 3 | 2 |
| 4 | 1 |
| 5 | 0 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 0 | |
| | |
| | 0 |
| 1 | 4 | 0
| 2 | 3 | 0
| 3 | 2 | 0
| 4 | 1 | 0
| 5 | 0 | 0
| 6 | 6 | 0
| 7 | 7 | 0
| 8 | 8 | 0
| 0 | | 0
| | | 0
| | 0 | 0
(99 rows)
SELECT '' AS "xxx", *
FROM J1_TBL CROSS JOIN J2_TBL a CROSS JOIN J2_TBL b;
xxx | i | j | t | i | k | i | k
-----+---+---+-------+---+----+---+----
| 1 | 4 | one | 1 | -1 | 1 | -1
| 1 | 4 | one | 1 | -1 | 2 | 2
| 1 | 4 | one | 1 | -1 | 3 | -3
| 1 | 4 | one | 1 | -1 | 2 | 4
| 1 | 4 | one | 1 | -1 | 5 | -5
| 1 | 4 | one | 1 | -1 | 5 | -5
| 1 | 4 | one | 1 | -1 | 0 |
| 1 | 4 | one | 1 | -1 | |
| 1 | 4 | one | 1 | -1 | | 0
| 2 | 3 | two | 1 | -1 | 1 | -1
| 2 | 3 | two | 1 | -1 | 2 | 2
| 2 | 3 | two | 1 | -1 | 3 | -3
| 2 | 3 | two | 1 | -1 | 2 | 4
| 2 | 3 | two | 1 | -1 | 5 | -5
| 2 | 3 | two | 1 | -1 | 5 | -5
| 2 | 3 | two | 1 | -1 | 0 |
| 2 | 3 | two | 1 | -1 | |
| 2 | 3 | two | 1 | -1 | | 0
| 3 | 2 | three | 1 | -1 | 1 | -1
| 3 | 2 | three | 1 | -1 | 2 | 2
| 3 | 2 | three | 1 | -1 | 3 | -3
| 3 | 2 | three | 1 | -1 | 2 | 4
| 3 | 2 | three | 1 | -1 | 5 | -5
| 3 | 2 | three | 1 | -1 | 5 | -5
| 3 | 2 | three | 1 | -1 | 0 |
| 3 | 2 | three | 1 | -1 | |
| 3 | 2 | three | 1 | -1 | | 0
| 4 | 1 | four | 1 | -1 | 1 | -1
| 4 | 1 | four | 1 | -1 | 2 | 2
| 4 | 1 | four | 1 | -1 | 3 | -3
| 4 | 1 | four | 1 | -1 | 2 | 4
| 4 | 1 | four | 1 | -1 | 5 | -5
| 4 | 1 | four | 1 | -1 | 5 | -5
| 4 | 1 | four | 1 | -1 | 0 |
| 4 | 1 | four | 1 | -1 | |
| 4 | 1 | four | 1 | -1 | | 0
| 5 | 0 | five | 1 | -1 | 1 | -1
| 5 | 0 | five | 1 | -1 | 2 | 2
| 5 | 0 | five | 1 | -1 | 3 | -3
| 5 | 0 | five | 1 | -1 | 2 | 4
| 5 | 0 | five | 1 | -1 | 5 | -5
| 5 | 0 | five | 1 | -1 | 5 | -5
| 5 | 0 | five | 1 | -1 | 0 |
| 5 | 0 | five | 1 | -1 | |
| 5 | 0 | five | 1 | -1 | | 0
| 6 | 6 | six | 1 | -1 | 1 | -1
| 6 | 6 | six | 1 | -1 | 2 | 2
| 6 | 6 | six | 1 | -1 | 3 | -3
| 6 | 6 | six | 1 | -1 | 2 | 4
| 6 | 6 | six | 1 | -1 | 5 | -5
| 6 | 6 | six | 1 | -1 | 5 | -5
| 6 | 6 | six | 1 | -1 | 0 |
| 6 | 6 | six | 1 | -1 | |
| 6 | 6 | six | 1 | -1 | | 0
| 7 | 7 | seven | 1 | -1 | 1 | -1
| 7 | 7 | seven | 1 | -1 | 2 | 2
| 7 | 7 | seven | 1 | -1 | 3 | -3
| 7 | 7 | seven | 1 | -1 | 2 | 4
| 7 | 7 | seven | 1 | -1 | 5 | -5
| 7 | 7 | seven | 1 | -1 | 5 | -5
| 7 | 7 | seven | 1 | -1 | 0 |
| 7 | 7 | seven | 1 | -1 | |
| 7 | 7 | seven | 1 | -1 | | 0
| 8 | 8 | eight | 1 | -1 | 1 | -1
| 8 | 8 | eight | 1 | -1 | 2 | 2
| 8 | 8 | eight | 1 | -1 | 3 | -3
| 8 | 8 | eight | 1 | -1 | 2 | 4
| 8 | 8 | eight | 1 | -1 | 5 | -5
| 8 | 8 | eight | 1 | -1 | 5 | -5
| 8 | 8 | eight | 1 | -1 | 0 |
| 8 | 8 | eight | 1 | -1 | |
| 8 | 8 | eight | 1 | -1 | | 0
| 0 | | zero | 1 | -1 | 1 | -1
| 0 | | zero | 1 | -1 | 2 | 2
| 0 | | zero | 1 | -1 | 3 | -3
| 0 | | zero | 1 | -1 | 2 | 4
| 0 | | zero | 1 | -1 | 5 | -5
| 0 | | zero | 1 | -1 | 5 | -5
| 0 | | zero | 1 | -1 | 0 |
| 0 | | zero | 1 | -1 | |
| 0 | | zero | 1 | -1 | | 0
| | | null | 1 | -1 | 1 | -1
| | | null | 1 | -1 | 2 | 2
| | | null | 1 | -1 | 3 | -3
| | | null | 1 | -1 | 2 | 4
| | | null | 1 | -1 | 5 | -5
| | | null | 1 | -1 | 5 | -5
| | | null | 1 | -1 | 0 |
| | | null | 1 | -1 | |
| | | null | 1 | -1 | | 0
| | 0 | zero | 1 | -1 | 1 | -1
| | 0 | zero | 1 | -1 | 2 | 2
| | 0 | zero | 1 | -1 | 3 | -3
| | 0 | zero | 1 | -1 | 2 | 4
| | 0 | zero | 1 | -1 | 5 | -5
| | 0 | zero | 1 | -1 | 5 | -5
| | 0 | zero | 1 | -1 | 0 |
| | 0 | zero | 1 | -1 | |
| | 0 | zero | 1 | -1 | | 0
| 1 | 4 | one | 2 | 2 | 1 | -1
| 1 | 4 | one | 2 | 2 | 2 | 2
| 1 | 4 | one | 2 | 2 | 3 | -3
| 1 | 4 | one | 2 | 2 | 2 | 4
| 1 | 4 | one | 2 | 2 | 5 | -5
| 1 | 4 | one | 2 | 2 | 5 | -5
| 1 | 4 | one | 2 | 2 | 0 |
| 1 | 4 | one | 2 | 2 | |
| 1 | 4 | one | 2 | 2 | | 0
| 2 | 3 | two | 2 | 2 | 1 | -1
| 2 | 3 | two | 2 | 2 | 2 | 2
| 2 | 3 | two | 2 | 2 | 3 | -3
| 2 | 3 | two | 2 | 2 | 2 | 4
| 2 | 3 | two | 2 | 2 | 5 | -5
| 2 | 3 | two | 2 | 2 | 5 | -5
| 2 | 3 | two | 2 | 2 | 0 |
| 2 | 3 | two | 2 | 2 | |
| 2 | 3 | two | 2 | 2 | | 0
| 3 | 2 | three | 2 | 2 | 1 | -1
| 3 | 2 | three | 2 | 2 | 2 | 2
| 3 | 2 | three | 2 | 2 | 3 | -3
| 3 | 2 | three | 2 | 2 | 2 | 4
| 3 | 2 | three | 2 | 2 | 5 | -5
| 3 | 2 | three | 2 | 2 | 5 | -5
| 3 | 2 | three | 2 | 2 | 0 |
| 3 | 2 | three | 2 | 2 | |
| 3 | 2 | three | 2 | 2 | | 0
| 4 | 1 | four | 2 | 2 | 1 | -1
| 4 | 1 | four | 2 | 2 | 2 | 2
| 4 | 1 | four | 2 | 2 | 3 | -3
| 4 | 1 | four | 2 | 2 | 2 | 4
| 4 | 1 | four | 2 | 2 | 5 | -5
| 4 | 1 | four | 2 | 2 | 5 | -5
| 4 | 1 | four | 2 | 2 | 0 |
| 4 | 1 | four | 2 | 2 | |
| 4 | 1 | four | 2 | 2 | | 0
| 5 | 0 | five | 2 | 2 | 1 | -1
| 5 | 0 | five | 2 | 2 | 2 | 2
| 5 | 0 | five | 2 | 2 | 3 | -3
| 5 | 0 | five | 2 | 2 | 2 | 4
| 5 | 0 | five | 2 | 2 | 5 | -5
| 5 | 0 | five | 2 | 2 | 5 | -5
| 5 | 0 | five | 2 | 2 | 0 |
| 5 | 0 | five | 2 | 2 | |
| 5 | 0 | five | 2 | 2 | | 0
| 6 | 6 | six | 2 | 2 | 1 | -1
| 6 | 6 | six | 2 | 2 | 2 | 2
| 6 | 6 | six | 2 | 2 | 3 | -3
| 6 | 6 | six | 2 | 2 | 2 | 4
| 6 | 6 | six | 2 | 2 | 5 | -5
| 6 | 6 | six | 2 | 2 | 5 | -5
| 6 | 6 | six | 2 | 2 | 0 |
| 6 | 6 | six | 2 | 2 | |
| 6 | 6 | six | 2 | 2 | | 0
| 7 | 7 | seven | 2 | 2 | 1 | -1
| 7 | 7 | seven | 2 | 2 | 2 | 2
| 7 | 7 | seven | 2 | 2 | 3 | -3
| 7 | 7 | seven | 2 | 2 | 2 | 4
| 7 | 7 | seven | 2 | 2 | 5 | -5
| 7 | 7 | seven | 2 | 2 | 5 | -5
| 7 | 7 | seven | 2 | 2 | 0 |
| 7 | 7 | seven | 2 | 2 | |
| 7 | 7 | seven | 2 | 2 | | 0
| 8 | 8 | eight | 2 | 2 | 1 | -1
| 8 | 8 | eight | 2 | 2 | 2 | 2
| 8 | 8 | eight | 2 | 2 | 3 | -3
| 8 | 8 | eight | 2 | 2 | 2 | 4
| 8 | 8 | eight | 2 | 2 | 5 | -5
| 8 | 8 | eight | 2 | 2 | 5 | -5
| 8 | 8 | eight | 2 | 2 | 0 |
| 8 | 8 | eight | 2 | 2 | |
| 8 | 8 | eight | 2 | 2 | | 0
| 0 | | zero | 2 | 2 | 1 | -1
| 0 | | zero | 2 | 2 | 2 | 2
| 0 | | zero | 2 | 2 | 3 | -3
| 0 | | zero | 2 | 2 | 2 | 4
| 0 | | zero | 2 | 2 | 5 | -5
| 0 | | zero | 2 | 2 | 5 | -5
| 0 | | zero | 2 | 2 | 0 |
| 0 | | zero | 2 | 2 | |
| 0 | | zero | 2 | 2 | | 0
| | | null | 2 | 2 | 1 | -1
| | | null | 2 | 2 | 2 | 2
| | | null | 2 | 2 | 3 | -3
| | | null | 2 | 2 | 2 | 4
| | | null | 2 | 2 | 5 | -5
| | | null | 2 | 2 | 5 | -5
| | | null | 2 | 2 | 0 |
| | | null | 2 | 2 | |
| | | null | 2 | 2 | | 0
| | 0 | zero | 2 | 2 | 1 | -1
| | 0 | zero | 2 | 2 | 2 | 2
| | 0 | zero | 2 | 2 | 3 | -3
| | 0 | zero | 2 | 2 | 2 | 4
| | 0 | zero | 2 | 2 | 5 | -5
| | 0 | zero | 2 | 2 | 5 | -5
| | 0 | zero | 2 | 2 | 0 |
| | 0 | zero | 2 | 2 | |
| | 0 | zero | 2 | 2 | | 0
| 1 | 4 | one | 3 | -3 | 1 | -1
| 1 | 4 | one | 3 | -3 | 2 | 2
| 1 | 4 | one | 3 | -3 | 3 | -3
| 1 | 4 | one | 3 | -3 | 2 | 4
| 1 | 4 | one | 3 | -3 | 5 | -5
| 1 | 4 | one | 3 | -3 | 5 | -5
| 1 | 4 | one | 3 | -3 | 0 |
| 1 | 4 | one | 3 | -3 | |
| 1 | 4 | one | 3 | -3 | | 0
| 2 | 3 | two | 3 | -3 | 1 | -1
| 2 | 3 | two | 3 | -3 | 2 | 2
| 2 | 3 | two | 3 | -3 | 3 | -3
| 2 | 3 | two | 3 | -3 | 2 | 4
| 2 | 3 | two | 3 | -3 | 5 | -5
| 2 | 3 | two | 3 | -3 | 5 | -5
| 2 | 3 | two | 3 | -3 | 0 |
| 2 | 3 | two | 3 | -3 | |
| 2 | 3 | two | 3 | -3 | | 0
| 3 | 2 | three | 3 | -3 | 1 | -1
| 3 | 2 | three | 3 | -3 | 2 | 2
| 3 | 2 | three | 3 | -3 | 3 | -3
| 3 | 2 | three | 3 | -3 | 2 | 4
| 3 | 2 | three | 3 | -3 | 5 | -5
| 3 | 2 | three | 3 | -3 | 5 | -5
| 3 | 2 | three | 3 | -3 | 0 |
| 3 | 2 | three | 3 | -3 | |
| 3 | 2 | three | 3 | -3 | | 0
| 4 | 1 | four | 3 | -3 | 1 | -1
| 4 | 1 | four | 3 | -3 | 2 | 2
| 4 | 1 | four | 3 | -3 | 3 | -3
| 4 | 1 | four | 3 | -3 | 2 | 4
| 4 | 1 | four | 3 | -3 | 5 | -5
| 4 | 1 | four | 3 | -3 | 5 | -5
| 4 | 1 | four | 3 | -3 | 0 |
| 4 | 1 | four | 3 | -3 | |
| 4 | 1 | four | 3 | -3 | | 0
| 5 | 0 | five | 3 | -3 | 1 | -1
| 5 | 0 | five | 3 | -3 | 2 | 2
| 5 | 0 | five | 3 | -3 | 3 | -3
| 5 | 0 | five | 3 | -3 | 2 | 4
| 5 | 0 | five | 3 | -3 | 5 | -5
| 5 | 0 | five | 3 | -3 | 5 | -5
| 5 | 0 | five | 3 | -3 | 0 |
| 5 | 0 | five | 3 | -3 | |
| 5 | 0 | five | 3 | -3 | | 0
| 6 | 6 | six | 3 | -3 | 1 | -1
| 6 | 6 | six | 3 | -3 | 2 | 2
| 6 | 6 | six | 3 | -3 | 3 | -3
| 6 | 6 | six | 3 | -3 | 2 | 4
| 6 | 6 | six | 3 | -3 | 5 | -5
| 6 | 6 | six | 3 | -3 | 5 | -5
| 6 | 6 | six | 3 | -3 | 0 |
| 6 | 6 | six | 3 | -3 | |
| 6 | 6 | six | 3 | -3 | | 0
| 7 | 7 | seven | 3 | -3 | 1 | -1
| 7 | 7 | seven | 3 | -3 | 2 | 2
| 7 | 7 | seven | 3 | -3 | 3 | -3
| 7 | 7 | seven | 3 | -3 | 2 | 4
| 7 | 7 | seven | 3 | -3 | 5 | -5
| 7 | 7 | seven | 3 | -3 | 5 | -5
| 7 | 7 | seven | 3 | -3 | 0 |
| 7 | 7 | seven | 3 | -3 | |
| 7 | 7 | seven | 3 | -3 | | 0
| 8 | 8 | eight | 3 | -3 | 1 | -1
| 8 | 8 | eight | 3 | -3 | 2 | 2
| 8 | 8 | eight | 3 | -3 | 3 | -3
| 8 | 8 | eight | 3 | -3 | 2 | 4
| 8 | 8 | eight | 3 | -3 | 5 | -5
| 8 | 8 | eight | 3 | -3 | 5 | -5
| 8 | 8 | eight | 3 | -3 | 0 |
| 8 | 8 | eight | 3 | -3 | |
| 8 | 8 | eight | 3 | -3 | | 0
| 0 | | zero | 3 | -3 | 1 | -1
| 0 | | zero | 3 | -3 | 2 | 2
| 0 | | zero | 3 | -3 | 3 | -3
| 0 | | zero | 3 | -3 | 2 | 4
| 0 | | zero | 3 | -3 | 5 | -5
| 0 | | zero | 3 | -3 | 5 | -5
| 0 | | zero | 3 | -3 | 0 |
| 0 | | zero | 3 | -3 | |
| 0 | | zero | 3 | -3 | | 0
| | | null | 3 | -3 | 1 | -1
| | | null | 3 | -3 | 2 | 2
| | | null | 3 | -3 | 3 | -3
| | | null | 3 | -3 | 2 | 4
| | | null | 3 | -3 | 5 | -5
| | | null | 3 | -3 | 5 | -5
| | | null | 3 | -3 | 0 |
| | | null | 3 | -3 | |
| | | null | 3 | -3 | | 0
| | 0 | zero | 3 | -3 | 1 | -1
| | 0 | zero | 3 | -3 | 2 | 2
| | 0 | zero | 3 | -3 | 3 | -3
| | 0 | zero | 3 | -3 | 2 | 4
| | 0 | zero | 3 | -3 | 5 | -5
| | 0 | zero | 3 | -3 | 5 | -5
| | 0 | zero | 3 | -3 | 0 |
| | 0 | zero | 3 | -3 | |
| | 0 | zero | 3 | -3 | | 0
| 1 | 4 | one | 2 | 4 | 1 | -1
| 1 | 4 | one | 2 | 4 | 2 | 2
| 1 | 4 | one | 2 | 4 | 3 | -3
| 1 | 4 | one | 2 | 4 | 2 | 4
| 1 | 4 | one | 2 | 4 | 5 | -5
| 1 | 4 | one | 2 | 4 | 5 | -5
| 1 | 4 | one | 2 | 4 | 0 |
| 1 | 4 | one | 2 | 4 | |
| 1 | 4 | one | 2 | 4 | | 0
| 2 | 3 | two | 2 | 4 | 1 | -1
| 2 | 3 | two | 2 | 4 | 2 | 2
| 2 | 3 | two | 2 | 4 | 3 | -3
| 2 | 3 | two | 2 | 4 | 2 | 4
| 2 | 3 | two | 2 | 4 | 5 | -5
| 2 | 3 | two | 2 | 4 | 5 | -5
| 2 | 3 | two | 2 | 4 | 0 |
| 2 | 3 | two | 2 | 4 | |
| 2 | 3 | two | 2 | 4 | | 0
| 3 | 2 | three | 2 | 4 | 1 | -1
| 3 | 2 | three | 2 | 4 | 2 | 2
| 3 | 2 | three | 2 | 4 | 3 | -3
| 3 | 2 | three | 2 | 4 | 2 | 4
| 3 | 2 | three | 2 | 4 | 5 | -5
| 3 | 2 | three | 2 | 4 | 5 | -5
| 3 | 2 | three | 2 | 4 | 0 |
| 3 | 2 | three | 2 | 4 | |
| 3 | 2 | three | 2 | 4 | | 0
| 4 | 1 | four | 2 | 4 | 1 | -1
| 4 | 1 | four | 2 | 4 | 2 | 2
| 4 | 1 | four | 2 | 4 | 3 | -3
| 4 | 1 | four | 2 | 4 | 2 | 4
| 4 | 1 | four | 2 | 4 | 5 | -5
| 4 | 1 | four | 2 | 4 | 5 | -5
| 4 | 1 | four | 2 | 4 | 0 |
| 4 | 1 | four | 2 | 4 | |
| 4 | 1 | four | 2 | 4 | | 0
| 5 | 0 | five | 2 | 4 | 1 | -1
| 5 | 0 | five | 2 | 4 | 2 | 2
| 5 | 0 | five | 2 | 4 | 3 | -3
| 5 | 0 | five | 2 | 4 | 2 | 4
| 5 | 0 | five | 2 | 4 | 5 | -5
| 5 | 0 | five | 2 | 4 | 5 | -5
| 5 | 0 | five | 2 | 4 | 0 |
| 5 | 0 | five | 2 | 4 | |
| 5 | 0 | five | 2 | 4 | | 0
| 6 | 6 | six | 2 | 4 | 1 | -1
| 6 | 6 | six | 2 | 4 | 2 | 2
| 6 | 6 | six | 2 | 4 | 3 | -3
| 6 | 6 | six | 2 | 4 | 2 | 4
| 6 | 6 | six | 2 | 4 | 5 | -5
| 6 | 6 | six | 2 | 4 | 5 | -5
| 6 | 6 | six | 2 | 4 | 0 |
| 6 | 6 | six | 2 | 4 | |
| 6 | 6 | six | 2 | 4 | | 0
| 7 | 7 | seven | 2 | 4 | 1 | -1
| 7 | 7 | seven | 2 | 4 | 2 | 2
| 7 | 7 | seven | 2 | 4 | 3 | -3
| 7 | 7 | seven | 2 | 4 | 2 | 4
| 7 | 7 | seven | 2 | 4 | 5 | -5
| 7 | 7 | seven | 2 | 4 | 5 | -5
| 7 | 7 | seven | 2 | 4 | 0 |
| 7 | 7 | seven | 2 | 4 | |
| 7 | 7 | seven | 2 | 4 | | 0
| 8 | 8 | eight | 2 | 4 | 1 | -1
| 8 | 8 | eight | 2 | 4 | 2 | 2
| 8 | 8 | eight | 2 | 4 | 3 | -3
| 8 | 8 | eight | 2 | 4 | 2 | 4
| 8 | 8 | eight | 2 | 4 | 5 | -5
| 8 | 8 | eight | 2 | 4 | 5 | -5
| 8 | 8 | eight | 2 | 4 | 0 |
| 8 | 8 | eight | 2 | 4 | |
| 8 | 8 | eight | 2 | 4 | | 0
| 0 | | zero | 2 | 4 | 1 | -1
| 0 | | zero | 2 | 4 | 2 | 2
| 0 | | zero | 2 | 4 | 3 | -3
| 0 | | zero | 2 | 4 | 2 | 4
| 0 | | zero | 2 | 4 | 5 | -5
| 0 | | zero | 2 | 4 | 5 | -5
| 0 | | zero | 2 | 4 | 0 |
| 0 | | zero | 2 | 4 | |
| 0 | | zero | 2 | 4 | | 0
| | | null | 2 | 4 | 1 | -1
| | | null | 2 | 4 | 2 | 2
| | | null | 2 | 4 | 3 | -3
| | | null | 2 | 4 | 2 | 4
| | | null | 2 | 4 | 5 | -5
| | | null | 2 | 4 | 5 | -5
| | | null | 2 | 4 | 0 |
| | | null | 2 | 4 | |
| | | null | 2 | 4 | | 0
| | 0 | zero | 2 | 4 | 1 | -1
| | 0 | zero | 2 | 4 | 2 | 2
| | 0 | zero | 2 | 4 | 3 | -3
| | 0 | zero | 2 | 4 | 2 | 4
| | 0 | zero | 2 | 4 | 5 | -5
| | 0 | zero | 2 | 4 | 5 | -5
| | 0 | zero | 2 | 4 | 0 |
| | 0 | zero | 2 | 4 | |
| | 0 | zero | 2 | 4 | | 0
| 1 | 4 | one | 5 | -5 | 1 | -1
| 1 | 4 | one | 5 | -5 | 2 | 2
| 1 | 4 | one | 5 | -5 | 3 | -3
| 1 | 4 | one | 5 | -5 | 2 | 4
| 1 | 4 | one | 5 | -5 | 5 | -5
| 1 | 4 | one | 5 | -5 | 5 | -5
| 1 | 4 | one | 5 | -5 | 0 |
| 1 | 4 | one | 5 | -5 | |
| 1 | 4 | one | 5 | -5 | | 0
| 2 | 3 | two | 5 | -5 | 1 | -1
| 2 | 3 | two | 5 | -5 | 2 | 2
| 2 | 3 | two | 5 | -5 | 3 | -3
| 2 | 3 | two | 5 | -5 | 2 | 4
| 2 | 3 | two | 5 | -5 | 5 | -5
| 2 | 3 | two | 5 | -5 | 5 | -5
| 2 | 3 | two | 5 | -5 | 0 |
| 2 | 3 | two | 5 | -5 | |
| 2 | 3 | two | 5 | -5 | | 0
| 3 | 2 | three | 5 | -5 | 1 | -1
| 3 | 2 | three | 5 | -5 | 2 | 2
| 3 | 2 | three | 5 | -5 | 3 | -3
| 3 | 2 | three | 5 | -5 | 2 | 4
| 3 | 2 | three | 5 | -5 | 5 | -5
| 3 | 2 | three | 5 | -5 | 5 | -5
| 3 | 2 | three | 5 | -5 | 0 |
| 3 | 2 | three | 5 | -5 | |
| 3 | 2 | three | 5 | -5 | | 0
| 4 | 1 | four | 5 | -5 | 1 | -1
| 4 | 1 | four | 5 | -5 | 2 | 2
| 4 | 1 | four | 5 | -5 | 3 | -3
| 4 | 1 | four | 5 | -5 | 2 | 4
| 4 | 1 | four | 5 | -5 | 5 | -5
| 4 | 1 | four | 5 | -5 | 5 | -5
| 4 | 1 | four | 5 | -5 | 0 |
| 4 | 1 | four | 5 | -5 | |
| 4 | 1 | four | 5 | -5 | | 0
| 5 | 0 | five | 5 | -5 | 1 | -1
| 5 | 0 | five | 5 | -5 | 2 | 2
| 5 | 0 | five | 5 | -5 | 3 | -3
| 5 | 0 | five | 5 | -5 | 2 | 4
| 5 | 0 | five | 5 | -5 | 5 | -5
| 5 | 0 | five | 5 | -5 | 5 | -5
| 5 | 0 | five | 5 | -5 | 0 |
| 5 | 0 | five | 5 | -5 | |
| 5 | 0 | five | 5 | -5 | | 0
| 6 | 6 | six | 5 | -5 | 1 | -1
| 6 | 6 | six | 5 | -5 | 2 | 2
| 6 | 6 | six | 5 | -5 | 3 | -3
| 6 | 6 | six | 5 | -5 | 2 | 4
| 6 | 6 | six | 5 | -5 | 5 | -5
| 6 | 6 | six | 5 | -5 | 5 | -5
| 6 | 6 | six | 5 | -5 | 0 |
| 6 | 6 | six | 5 | -5 | |
| 6 | 6 | six | 5 | -5 | | 0
| 7 | 7 | seven | 5 | -5 | 1 | -1
| 7 | 7 | seven | 5 | -5 | 2 | 2
| 7 | 7 | seven | 5 | -5 | 3 | -3
| 7 | 7 | seven | 5 | -5 | 2 | 4
| 7 | 7 | seven | 5 | -5 | 5 | -5
| 7 | 7 | seven | 5 | -5 | 5 | -5
| 7 | 7 | seven | 5 | -5 | 0 |
| 7 | 7 | seven | 5 | -5 | |
| 7 | 7 | seven | 5 | -5 | | 0
| 8 | 8 | eight | 5 | -5 | 1 | -1
| 8 | 8 | eight | 5 | -5 | 2 | 2
| 8 | 8 | eight | 5 | -5 | 3 | -3
| 8 | 8 | eight | 5 | -5 | 2 | 4
| 8 | 8 | eight | 5 | -5 | 5 | -5
| 8 | 8 | eight | 5 | -5 | 5 | -5
| 8 | 8 | eight | 5 | -5 | 0 |
| 8 | 8 | eight | 5 | -5 | |
| 8 | 8 | eight | 5 | -5 | | 0
| 0 | | zero | 5 | -5 | 1 | -1
| 0 | | zero | 5 | -5 | 2 | 2
| 0 | | zero | 5 | -5 | 3 | -3
| 0 | | zero | 5 | -5 | 2 | 4
| 0 | | zero | 5 | -5 | 5 | -5
| 0 | | zero | 5 | -5 | 5 | -5
| 0 | | zero | 5 | -5 | 0 |
| 0 | | zero | 5 | -5 | |
| 0 | | zero | 5 | -5 | | 0
| | | null | 5 | -5 | 1 | -1
| | | null | 5 | -5 | 2 | 2
| | | null | 5 | -5 | 3 | -3
| | | null | 5 | -5 | 2 | 4
| | | null | 5 | -5 | 5 | -5
| | | null | 5 | -5 | 5 | -5
| | | null | 5 | -5 | 0 |
| | | null | 5 | -5 | |
| | | null | 5 | -5 | | 0
| | 0 | zero | 5 | -5 | 1 | -1
| | 0 | zero | 5 | -5 | 2 | 2
| | 0 | zero | 5 | -5 | 3 | -3
| | 0 | zero | 5 | -5 | 2 | 4
| | 0 | zero | 5 | -5 | 5 | -5
| | 0 | zero | 5 | -5 | 5 | -5
| | 0 | zero | 5 | -5 | 0 |
| | 0 | zero | 5 | -5 | |
| | 0 | zero | 5 | -5 | | 0
| 1 | 4 | one | 5 | -5 | 1 | -1
| 1 | 4 | one | 5 | -5 | 2 | 2
| 1 | 4 | one | 5 | -5 | 3 | -3
| 1 | 4 | one | 5 | -5 | 2 | 4
| 1 | 4 | one | 5 | -5 | 5 | -5
| 1 | 4 | one | 5 | -5 | 5 | -5
| 1 | 4 | one | 5 | -5 | 0 |
| 1 | 4 | one | 5 | -5 | |
| 1 | 4 | one | 5 | -5 | | 0
| 2 | 3 | two | 5 | -5 | 1 | -1
| 2 | 3 | two | 5 | -5 | 2 | 2
| 2 | 3 | two | 5 | -5 | 3 | -3
| 2 | 3 | two | 5 | -5 | 2 | 4
| 2 | 3 | two | 5 | -5 | 5 | -5
| 2 | 3 | two | 5 | -5 | 5 | -5
| 2 | 3 | two | 5 | -5 | 0 |
| 2 | 3 | two | 5 | -5 | |
| 2 | 3 | two | 5 | -5 | | 0
| 3 | 2 | three | 5 | -5 | 1 | -1
| 3 | 2 | three | 5 | -5 | 2 | 2
| 3 | 2 | three | 5 | -5 | 3 | -3
| 3 | 2 | three | 5 | -5 | 2 | 4
| 3 | 2 | three | 5 | -5 | 5 | -5
| 3 | 2 | three | 5 | -5 | 5 | -5
| 3 | 2 | three | 5 | -5 | 0 |
| 3 | 2 | three | 5 | -5 | |
| 3 | 2 | three | 5 | -5 | | 0
| 4 | 1 | four | 5 | -5 | 1 | -1
| 4 | 1 | four | 5 | -5 | 2 | 2
| 4 | 1 | four | 5 | -5 | 3 | -3
| 4 | 1 | four | 5 | -5 | 2 | 4
| 4 | 1 | four | 5 | -5 | 5 | -5
| 4 | 1 | four | 5 | -5 | 5 | -5
| 4 | 1 | four | 5 | -5 | 0 |
| 4 | 1 | four | 5 | -5 | |
| 4 | 1 | four | 5 | -5 | | 0
| 5 | 0 | five | 5 | -5 | 1 | -1
| 5 | 0 | five | 5 | -5 | 2 | 2
| 5 | 0 | five | 5 | -5 | 3 | -3
| 5 | 0 | five | 5 | -5 | 2 | 4
| 5 | 0 | five | 5 | -5 | 5 | -5
| 5 | 0 | five | 5 | -5 | 5 | -5
| 5 | 0 | five | 5 | -5 | 0 |
| 5 | 0 | five | 5 | -5 | |
| 5 | 0 | five | 5 | -5 | | 0
| 6 | 6 | six | 5 | -5 | 1 | -1
| 6 | 6 | six | 5 | -5 | 2 | 2
| 6 | 6 | six | 5 | -5 | 3 | -3
| 6 | 6 | six | 5 | -5 | 2 | 4
| 6 | 6 | six | 5 | -5 | 5 | -5
| 6 | 6 | six | 5 | -5 | 5 | -5
| 6 | 6 | six | 5 | -5 | 0 |
| 6 | 6 | six | 5 | -5 | |
| 6 | 6 | six | 5 | -5 | | 0
| 7 | 7 | seven | 5 | -5 | 1 | -1
| 7 | 7 | seven | 5 | -5 | 2 | 2
| 7 | 7 | seven | 5 | -5 | 3 | -3
| 7 | 7 | seven | 5 | -5 | 2 | 4
| 7 | 7 | seven | 5 | -5 | 5 | -5
| 7 | 7 | seven | 5 | -5 | 5 | -5
| 7 | 7 | seven | 5 | -5 | 0 |
| 7 | 7 | seven | 5 | -5 | |
| 7 | 7 | seven | 5 | -5 | | 0
| 8 | 8 | eight | 5 | -5 | 1 | -1
| 8 | 8 | eight | 5 | -5 | 2 | 2
| 8 | 8 | eight | 5 | -5 | 3 | -3
| 8 | 8 | eight | 5 | -5 | 2 | 4
| 8 | 8 | eight | 5 | -5 | 5 | -5
| 8 | 8 | eight | 5 | -5 | 5 | -5
| 8 | 8 | eight | 5 | -5 | 0 |
| 8 | 8 | eight | 5 | -5 | |
| 8 | 8 | eight | 5 | -5 | | 0
| 0 | | zero | 5 | -5 | 1 | -1
| 0 | | zero | 5 | -5 | 2 | 2
| 0 | | zero | 5 | -5 | 3 | -3
| 0 | | zero | 5 | -5 | 2 | 4
| 0 | | zero | 5 | -5 | 5 | -5
| 0 | | zero | 5 | -5 | 5 | -5
| 0 | | zero | 5 | -5 | 0 |
| 0 | | zero | 5 | -5 | |
| 0 | | zero | 5 | -5 | | 0
| | | null | 5 | -5 | 1 | -1
| | | null | 5 | -5 | 2 | 2
| | | null | 5 | -5 | 3 | -3
| | | null | 5 | -5 | 2 | 4
| | | null | 5 | -5 | 5 | -5
| | | null | 5 | -5 | 5 | -5
| | | null | 5 | -5 | 0 |
| | | null | 5 | -5 | |
| | | null | 5 | -5 | | 0
| | 0 | zero | 5 | -5 | 1 | -1
| | 0 | zero | 5 | -5 | 2 | 2
| | 0 | zero | 5 | -5 | 3 | -3
| | 0 | zero | 5 | -5 | 2 | 4
| | 0 | zero | 5 | -5 | 5 | -5
| | 0 | zero | 5 | -5 | 5 | -5
| | 0 | zero | 5 | -5 | 0 |
| | 0 | zero | 5 | -5 | |
| | 0 | zero | 5 | -5 | | 0
| 1 | 4 | one | 0 | | 1 | -1
| 1 | 4 | one | 0 | | 2 | 2
| 1 | 4 | one | 0 | | 3 | -3
| 1 | 4 | one | 0 | | 2 | 4
| 1 | 4 | one | 0 | | 5 | -5
| 1 | 4 | one | 0 | | 5 | -5
| 1 | 4 | one | 0 | | 0 |
| 1 | 4 | one | 0 | | |
| 1 | 4 | one | 0 | | | 0
| 2 | 3 | two | 0 | | 1 | -1
| 2 | 3 | two | 0 | | 2 | 2
| 2 | 3 | two | 0 | | 3 | -3
| 2 | 3 | two | 0 | | 2 | 4
| 2 | 3 | two | 0 | | 5 | -5
| 2 | 3 | two | 0 | | 5 | -5
| 2 | 3 | two | 0 | | 0 |
| 2 | 3 | two | 0 | | |
| 2 | 3 | two | 0 | | | 0
| 3 | 2 | three | 0 | | 1 | -1
| 3 | 2 | three | 0 | | 2 | 2
| 3 | 2 | three | 0 | | 3 | -3
| 3 | 2 | three | 0 | | 2 | 4
| 3 | 2 | three | 0 | | 5 | -5
| 3 | 2 | three | 0 | | 5 | -5
| 3 | 2 | three | 0 | | 0 |
| 3 | 2 | three | 0 | | |
| 3 | 2 | three | 0 | | | 0
| 4 | 1 | four | 0 | | 1 | -1
| 4 | 1 | four | 0 | | 2 | 2
| 4 | 1 | four | 0 | | 3 | -3
| 4 | 1 | four | 0 | | 2 | 4
| 4 | 1 | four | 0 | | 5 | -5
| 4 | 1 | four | 0 | | 5 | -5
| 4 | 1 | four | 0 | | 0 |
| 4 | 1 | four | 0 | | |
| 4 | 1 | four | 0 | | | 0
| 5 | 0 | five | 0 | | 1 | -1
| 5 | 0 | five | 0 | | 2 | 2
| 5 | 0 | five | 0 | | 3 | -3
| 5 | 0 | five | 0 | | 2 | 4
| 5 | 0 | five | 0 | | 5 | -5
| 5 | 0 | five | 0 | | 5 | -5
| 5 | 0 | five | 0 | | 0 |
| 5 | 0 | five | 0 | | |
| 5 | 0 | five | 0 | | | 0
| 6 | 6 | six | 0 | | 1 | -1
| 6 | 6 | six | 0 | | 2 | 2
| 6 | 6 | six | 0 | | 3 | -3
| 6 | 6 | six | 0 | | 2 | 4
| 6 | 6 | six | 0 | | 5 | -5
| 6 | 6 | six | 0 | | 5 | -5
| 6 | 6 | six | 0 | | 0 |
| 6 | 6 | six | 0 | | |
| 6 | 6 | six | 0 | | | 0
| 7 | 7 | seven | 0 | | 1 | -1
| 7 | 7 | seven | 0 | | 2 | 2
| 7 | 7 | seven | 0 | | 3 | -3
| 7 | 7 | seven | 0 | | 2 | 4
| 7 | 7 | seven | 0 | | 5 | -5
| 7 | 7 | seven | 0 | | 5 | -5
| 7 | 7 | seven | 0 | | 0 |
| 7 | 7 | seven | 0 | | |
| 7 | 7 | seven | 0 | | | 0
| 8 | 8 | eight | 0 | | 1 | -1
| 8 | 8 | eight | 0 | | 2 | 2
| 8 | 8 | eight | 0 | | 3 | -3
| 8 | 8 | eight | 0 | | 2 | 4
| 8 | 8 | eight | 0 | | 5 | -5
| 8 | 8 | eight | 0 | | 5 | -5
| 8 | 8 | eight | 0 | | 0 |
| 8 | 8 | eight | 0 | | |
| 8 | 8 | eight | 0 | | | 0
| 0 | | zero | 0 | | 1 | -1
| 0 | | zero | 0 | | 2 | 2
| 0 | | zero | 0 | | 3 | -3
| 0 | | zero | 0 | | 2 | 4
| 0 | | zero | 0 | | 5 | -5
| 0 | | zero | 0 | | 5 | -5
| 0 | | zero | 0 | | 0 |
| 0 | | zero | 0 | | |
| 0 | | zero | 0 | | | 0
| | | null | 0 | | 1 | -1
| | | null | 0 | | 2 | 2
| | | null | 0 | | 3 | -3
| | | null | 0 | | 2 | 4
| | | null | 0 | | 5 | -5
| | | null | 0 | | 5 | -5
| | | null | 0 | | 0 |
| | | null | 0 | | |
| | | null | 0 | | | 0
| | 0 | zero | 0 | | 1 | -1
| | 0 | zero | 0 | | 2 | 2
| | 0 | zero | 0 | | 3 | -3
| | 0 | zero | 0 | | 2 | 4
| | 0 | zero | 0 | | 5 | -5
| | 0 | zero | 0 | | 5 | -5
| | 0 | zero | 0 | | 0 |
| | 0 | zero | 0 | | |
| | 0 | zero | 0 | | | 0
| 1 | 4 | one | | | 1 | -1
| 1 | 4 | one | | | 2 | 2
| 1 | 4 | one | | | 3 | -3
| 1 | 4 | one | | | 2 | 4
| 1 | 4 | one | | | 5 | -5
| 1 | 4 | one | | | 5 | -5
| 1 | 4 | one | | | 0 |
| 1 | 4 | one | | | |
| 1 | 4 | one | | | | 0
| 2 | 3 | two | | | 1 | -1
| 2 | 3 | two | | | 2 | 2
| 2 | 3 | two | | | 3 | -3
| 2 | 3 | two | | | 2 | 4
| 2 | 3 | two | | | 5 | -5
| 2 | 3 | two | | | 5 | -5
| 2 | 3 | two | | | 0 |
| 2 | 3 | two | | | |
| 2 | 3 | two | | | | 0
| 3 | 2 | three | | | 1 | -1
| 3 | 2 | three | | | 2 | 2
| 3 | 2 | three | | | 3 | -3
| 3 | 2 | three | | | 2 | 4
| 3 | 2 | three | | | 5 | -5
| 3 | 2 | three | | | 5 | -5
| 3 | 2 | three | | | 0 |
| 3 | 2 | three | | | |
| 3 | 2 | three | | | | 0
| 4 | 1 | four | | | 1 | -1
| 4 | 1 | four | | | 2 | 2
| 4 | 1 | four | | | 3 | -3
| 4 | 1 | four | | | 2 | 4
| 4 | 1 | four | | | 5 | -5
| 4 | 1 | four | | | 5 | -5
| 4 | 1 | four | | | 0 |
| 4 | 1 | four | | | |
| 4 | 1 | four | | | | 0
| 5 | 0 | five | | | 1 | -1
| 5 | 0 | five | | | 2 | 2
| 5 | 0 | five | | | 3 | -3
| 5 | 0 | five | | | 2 | 4
| 5 | 0 | five | | | 5 | -5
| 5 | 0 | five | | | 5 | -5
| 5 | 0 | five | | | 0 |
| 5 | 0 | five | | | |
| 5 | 0 | five | | | | 0
| 6 | 6 | six | | | 1 | -1
| 6 | 6 | six | | | 2 | 2
| 6 | 6 | six | | | 3 | -3
| 6 | 6 | six | | | 2 | 4
| 6 | 6 | six | | | 5 | -5
| 6 | 6 | six | | | 5 | -5
| 6 | 6 | six | | | 0 |
| 6 | 6 | six | | | |
| 6 | 6 | six | | | | 0
| 7 | 7 | seven | | | 1 | -1
| 7 | 7 | seven | | | 2 | 2
| 7 | 7 | seven | | | 3 | -3
| 7 | 7 | seven | | | 2 | 4
| 7 | 7 | seven | | | 5 | -5
| 7 | 7 | seven | | | 5 | -5
| 7 | 7 | seven | | | 0 |
| 7 | 7 | seven | | | |
| 7 | 7 | seven | | | | 0
| 8 | 8 | eight | | | 1 | -1
| 8 | 8 | eight | | | 2 | 2
| 8 | 8 | eight | | | 3 | -3
| 8 | 8 | eight | | | 2 | 4
| 8 | 8 | eight | | | 5 | -5
| 8 | 8 | eight | | | 5 | -5
| 8 | 8 | eight | | | 0 |
| 8 | 8 | eight | | | |
| 8 | 8 | eight | | | | 0
| 0 | | zero | | | 1 | -1
| 0 | | zero | | | 2 | 2
| 0 | | zero | | | 3 | -3
| 0 | | zero | | | 2 | 4
| 0 | | zero | | | 5 | -5
| 0 | | zero | | | 5 | -5
| 0 | | zero | | | 0 |
| 0 | | zero | | | |
| 0 | | zero | | | | 0
| | | null | | | 1 | -1
| | | null | | | 2 | 2
| | | null | | | 3 | -3
| | | null | | | 2 | 4
| | | null | | | 5 | -5
| | | null | | | 5 | -5
| | | null | | | 0 |
| | | null | | | |
| | | null | | | | 0
| | 0 | zero | | | 1 | -1
| | 0 | zero | | | 2 | 2
| | 0 | zero | | | 3 | -3
| | 0 | zero | | | 2 | 4
| | 0 | zero | | | 5 | -5
| | 0 | zero | | | 5 | -5
| | 0 | zero | | | 0 |
| | 0 | zero | | | |
| | 0 | zero | | | | 0
| 1 | 4 | one | | 0 | 1 | -1
| 1 | 4 | one | | 0 | 2 | 2
| 1 | 4 | one | | 0 | 3 | -3
| 1 | 4 | one | | 0 | 2 | 4
| 1 | 4 | one | | 0 | 5 | -5
| 1 | 4 | one | | 0 | 5 | -5
| 1 | 4 | one | | 0 | 0 |
| 1 | 4 | one | | 0 | |
| 1 | 4 | one | | 0 | | 0
| 2 | 3 | two | | 0 | 1 | -1
| 2 | 3 | two | | 0 | 2 | 2
| 2 | 3 | two | | 0 | 3 | -3
| 2 | 3 | two | | 0 | 2 | 4
| 2 | 3 | two | | 0 | 5 | -5
| 2 | 3 | two | | 0 | 5 | -5
| 2 | 3 | two | | 0 | 0 |
| 2 | 3 | two | | 0 | |
| 2 | 3 | two | | 0 | | 0
| 3 | 2 | three | | 0 | 1 | -1
| 3 | 2 | three | | 0 | 2 | 2
| 3 | 2 | three | | 0 | 3 | -3
| 3 | 2 | three | | 0 | 2 | 4
| 3 | 2 | three | | 0 | 5 | -5
| 3 | 2 | three | | 0 | 5 | -5
| 3 | 2 | three | | 0 | 0 |
| 3 | 2 | three | | 0 | |
| 3 | 2 | three | | 0 | | 0
| 4 | 1 | four | | 0 | 1 | -1
| 4 | 1 | four | | 0 | 2 | 2
| 4 | 1 | four | | 0 | 3 | -3
| 4 | 1 | four | | 0 | 2 | 4
| 4 | 1 | four | | 0 | 5 | -5
| 4 | 1 | four | | 0 | 5 | -5
| 4 | 1 | four | | 0 | 0 |
| 4 | 1 | four | | 0 | |
| 4 | 1 | four | | 0 | | 0
| 5 | 0 | five | | 0 | 1 | -1
| 5 | 0 | five | | 0 | 2 | 2
| 5 | 0 | five | | 0 | 3 | -3
| 5 | 0 | five | | 0 | 2 | 4
| 5 | 0 | five | | 0 | 5 | -5
| 5 | 0 | five | | 0 | 5 | -5
| 5 | 0 | five | | 0 | 0 |
| 5 | 0 | five | | 0 | |
| 5 | 0 | five | | 0 | | 0
| 6 | 6 | six | | 0 | 1 | -1
| 6 | 6 | six | | 0 | 2 | 2
| 6 | 6 | six | | 0 | 3 | -3
| 6 | 6 | six | | 0 | 2 | 4
| 6 | 6 | six | | 0 | 5 | -5
| 6 | 6 | six | | 0 | 5 | -5
| 6 | 6 | six | | 0 | 0 |
| 6 | 6 | six | | 0 | |
| 6 | 6 | six | | 0 | | 0
| 7 | 7 | seven | | 0 | 1 | -1
| 7 | 7 | seven | | 0 | 2 | 2
| 7 | 7 | seven | | 0 | 3 | -3
| 7 | 7 | seven | | 0 | 2 | 4
| 7 | 7 | seven | | 0 | 5 | -5
| 7 | 7 | seven | | 0 | 5 | -5
| 7 | 7 | seven | | 0 | 0 |
| 7 | 7 | seven | | 0 | |
| 7 | 7 | seven | | 0 | | 0
| 8 | 8 | eight | | 0 | 1 | -1
| 8 | 8 | eight | | 0 | 2 | 2
| 8 | 8 | eight | | 0 | 3 | -3
| 8 | 8 | eight | | 0 | 2 | 4
| 8 | 8 | eight | | 0 | 5 | -5
| 8 | 8 | eight | | 0 | 5 | -5
| 8 | 8 | eight | | 0 | 0 |
| 8 | 8 | eight | | 0 | |
| 8 | 8 | eight | | 0 | | 0
| 0 | | zero | | 0 | 1 | -1
| 0 | | zero | | 0 | 2 | 2
| 0 | | zero | | 0 | 3 | -3
| 0 | | zero | | 0 | 2 | 4
| 0 | | zero | | 0 | 5 | -5
| 0 | | zero | | 0 | 5 | -5
| 0 | | zero | | 0 | 0 |
| 0 | | zero | | 0 | |
| 0 | | zero | | 0 | | 0
| | | null | | 0 | 1 | -1
| | | null | | 0 | 2 | 2
| | | null | | 0 | 3 | -3
| | | null | | 0 | 2 | 4
| | | null | | 0 | 5 | -5
| | | null | | 0 | 5 | -5
| | | null | | 0 | 0 |
| | | null | | 0 | |
| | | null | | 0 | | 0
| | 0 | zero | | 0 | 1 | -1
| | 0 | zero | | 0 | 2 | 2
| | 0 | zero | | 0 | 3 | -3
| | 0 | zero | | 0 | 2 | 4
| | 0 | zero | | 0 | 5 | -5
| | 0 | zero | | 0 | 5 | -5
| | 0 | zero | | 0 | 0 |
| | 0 | zero | | 0 | |
| | 0 | zero | | 0 | | 0
(891 rows)
--
--
-- Inner joins (equi-joins)
--
--
--
-- Inner joins (equi-joins) with USING clause
-- The USING syntax changes the shape of the resulting table
-- by including a column in the USING clause only once in the result.
--
-- Inner equi-join on specified column
SELECT '' AS "xxx", *
FROM J1_TBL INNER JOIN J2_TBL USING (i);
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
-- Same as above, slightly different syntax
SELECT '' AS "xxx", *
FROM J1_TBL JOIN J2_TBL USING (i);
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c) JOIN J2_TBL t2 (a, d) USING (a)
ORDER BY a, d;
xxx | a | b | c | d
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c) JOIN J2_TBL t2 (a, b) USING (b)
ORDER BY b, t1.a;
xxx | b | a | c | a
-----+---+---+-------+---
| 0 | 5 | five |
| 0 | | zero |
| 2 | 3 | three | 2
| 4 | 1 | one | 2
(4 rows)
--
-- NATURAL JOIN
-- Inner equi-join on all columns with the same name
--
SELECT '' AS "xxx", *
FROM J1_TBL NATURAL JOIN J2_TBL;
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c) NATURAL JOIN J2_TBL t2 (a, d);
xxx | a | b | c | d
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b, c) NATURAL JOIN J2_TBL t2 (d, a);
xxx | a | b | c | d
-----+---+---+------+---
| 0 | | zero |
| 2 | 3 | two | 2
| 4 | 1 | four | 2
(3 rows)
-- mismatch number of columns
-- currently, Postgres will fill in with underlying names
SELECT '' AS "xxx", *
FROM J1_TBL t1 (a, b) NATURAL JOIN J2_TBL t2 (a);
xxx | a | b | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
(7 rows)
--
-- Inner joins (equi-joins)
--
SELECT '' AS "xxx", *
FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i = J2_TBL.i);
xxx | i | j | t | i | k
-----+---+---+-------+---+----
| 0 | | zero | 0 |
| 1 | 4 | one | 1 | -1
| 2 | 3 | two | 2 | 2
| 2 | 3 | two | 2 | 4
| 3 | 2 | three | 3 | -3
| 5 | 0 | five | 5 | -5
| 5 | 0 | five | 5 | -5
(7 rows)
SELECT '' AS "xxx", *
FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i = J2_TBL.k);
xxx | i | j | t | i | k
-----+---+---+------+---+---
| 0 | | zero | | 0
| 2 | 3 | two | 2 | 2
| 4 | 1 | four | 2 | 4
(3 rows)
--
-- Non-equi-joins
--
SELECT '' AS "xxx", *
FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i <= J2_TBL.k);
xxx | i | j | t | i | k
-----+---+---+-------+---+---
| 1 | 4 | one | 2 | 2
| 2 | 3 | two | 2 | 2
| 0 | | zero | 2 | 2
| 1 | 4 | one | 2 | 4
| 2 | 3 | two | 2 | 4
| 3 | 2 | three | 2 | 4
| 4 | 1 | four | 2 | 4
| 0 | | zero | 2 | 4
| 0 | | zero | | 0
(9 rows)
--
-- Outer joins
-- Note that OUTER is a noise word
--
SELECT '' AS "xxx", *
FROM J1_TBL LEFT OUTER JOIN J2_TBL USING (i)
ORDER BY i, k, t;
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 4 | 1 | four |
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| 6 | 6 | six |
| 7 | 7 | seven |
| 8 | 8 | eight |
| | | null |
| | 0 | zero |
(13 rows)
SELECT '' AS "xxx", *
FROM J1_TBL LEFT JOIN J2_TBL USING (i)
ORDER BY i, k, t;
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 4 | 1 | four |
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| 6 | 6 | six |
| 7 | 7 | seven |
| 8 | 8 | eight |
| | | null |
| | 0 | zero |
(13 rows)
SELECT '' AS "xxx", *
FROM J1_TBL RIGHT OUTER JOIN J2_TBL USING (i);
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| | | |
| | | | 0
(9 rows)
SELECT '' AS "xxx", *
FROM J1_TBL RIGHT JOIN J2_TBL USING (i);
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| | | |
| | | | 0
(9 rows)
SELECT '' AS "xxx", *
FROM J1_TBL FULL OUTER JOIN J2_TBL USING (i)
ORDER BY i, k, t;
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 4 | 1 | four |
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| 6 | 6 | six |
| 7 | 7 | seven |
| 8 | 8 | eight |
| | | | 0
| | | null |
| | 0 | zero |
| | | |
(15 rows)
SELECT '' AS "xxx", *
FROM J1_TBL FULL JOIN J2_TBL USING (i)
ORDER BY i, k, t;
xxx | i | j | t | k
-----+---+---+-------+----
| 0 | | zero |
| 1 | 4 | one | -1
| 2 | 3 | two | 2
| 2 | 3 | two | 4
| 3 | 2 | three | -3
| 4 | 1 | four |
| 5 | 0 | five | -5
| 5 | 0 | five | -5
| 6 | 6 | six |
| 7 | 7 | seven |
| 8 | 8 | eight |
| | | | 0
| | | null |
| | 0 | zero |
| | | |
(15 rows)
SELECT '' AS "xxx", *
FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (k = 1);
xxx | i | j | t | k
-----+---+---+---+---
(0 rows)
SELECT '' AS "xxx", *
FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (i = 1);
xxx | i | j | t | k
-----+---+---+-----+----
| 1 | 4 | one | -1
(1 row)
--
-- More complicated constructs
--
--
-- Multiway full join
--
CREATE TABLE t1 (name TEXT, n INTEGER);
CREATE TABLE t2 (name TEXT, n INTEGER);
CREATE TABLE t3 (name TEXT, n INTEGER);
INSERT INTO t1 VALUES ( 'bb', 11 );
INSERT INTO t2 VALUES ( 'bb', 12 );
INSERT INTO t2 VALUES ( 'cc', 22 );
INSERT INTO t2 VALUES ( 'ee', 42 );
INSERT INTO t3 VALUES ( 'bb', 13 );
INSERT INTO t3 VALUES ( 'cc', 23 );
INSERT INTO t3 VALUES ( 'dd', 33 );
SELECT * FROM t1 FULL JOIN t2 USING (name) FULL JOIN t3 USING (name);
name | n | n | n
------+----+----+----
bb | 11 | 12 | 13
cc | | 22 | 23
dd | | | 33
ee | | 42 |
(4 rows)
--
-- Test interactions of join syntax and subqueries
--
-- Basic cases (we expect planner to pull up the subquery here)
SELECT * FROM
(SELECT * FROM t2) as s2
INNER JOIN
(SELECT * FROM t3) s3
USING (name);
name | n | n
------+----+----
bb | 12 | 13
cc | 22 | 23
(2 rows)
SELECT * FROM
(SELECT * FROM t2) as s2
LEFT JOIN
(SELECT * FROM t3) s3
USING (name);
name | n | n
------+----+----
bb | 12 | 13
cc | 22 | 23
ee | 42 |
(3 rows)
SELECT * FROM
(SELECT * FROM t2) as s2
FULL JOIN
(SELECT * FROM t3) s3
USING (name);
name | n | n
------+----+----
bb | 12 | 13
cc | 22 | 23
dd | | 33
ee | 42 |
(4 rows)
-- Cases with non-nullable expressions in subquery results;
-- make sure these go to null as expected
SELECT * FROM
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL INNER JOIN
(SELECT name, n as s3_n, 3 as s3_2 FROM t3) s3;
name | s2_n | s2_2 | s3_n | s3_2
------+------+------+------+------
bb | 12 | 2 | 13 | 3
cc | 22 | 2 | 23 | 3
(2 rows)
SELECT * FROM
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL LEFT JOIN
(SELECT name, n as s3_n, 3 as s3_2 FROM t3) s3;
name | s2_n | s2_2 | s3_n | s3_2
------+------+------+------+------
bb | 12 | 2 | 13 | 3
cc | 22 | 2 | 23 | 3
ee | 42 | 2 | |
(3 rows)
SELECT * FROM
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL FULL JOIN
(SELECT name, n as s3_n, 3 as s3_2 FROM t3) s3;
name | s2_n | s2_2 | s3_n | s3_2
------+------+------+------+------
bb | 12 | 2 | 13 | 3
cc | 22 | 2 | 23 | 3
dd | | | 33 | 3
ee | 42 | 2 | |
(4 rows)
SELECT * FROM
(SELECT name, n as s1_n, 1 as s1_1 FROM t1) as s1
NATURAL INNER JOIN
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL INNER JOIN
(SELECT name, n as s3_n, 3 as s3_2 FROM t3) s3;
name | s1_n | s1_1 | s2_n | s2_2 | s3_n | s3_2
------+------+------+------+------+------+------
bb | 11 | 1 | 12 | 2 | 13 | 3
(1 row)
SELECT * FROM
(SELECT name, n as s1_n, 1 as s1_1 FROM t1) as s1
NATURAL FULL JOIN
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL FULL JOIN
(SELECT name, n as s3_n, 3 as s3_2 FROM t3) s3;
name | s1_n | s1_1 | s2_n | s2_2 | s3_n | s3_2
------+------+------+------+------+------+------
bb | 11 | 1 | 12 | 2 | 13 | 3
cc | | | 22 | 2 | 23 | 3
dd | | | | | 33 | 3
ee | | | 42 | 2 | |
(4 rows)
SELECT * FROM
(SELECT name, n as s1_n FROM t1) as s1
NATURAL FULL JOIN
(SELECT * FROM
(SELECT name, n as s2_n FROM t2) as s2
NATURAL FULL JOIN
(SELECT name, n as s3_n FROM t3) as s3
) ss2;
name | s1_n | s2_n | s3_n
------+------+------+------
bb | 11 | 12 | 13
cc | | 22 | 23
dd | | | 33
ee | | 42 |
(4 rows)
SELECT * FROM
(SELECT name, n as s1_n FROM t1) as s1
NATURAL FULL JOIN
(SELECT * FROM
(SELECT name, n as s2_n, 2 as s2_2 FROM t2) as s2
NATURAL FULL JOIN
(SELECT name, n as s3_n FROM t3) as s3
) ss2;
name | s1_n | s2_n | s2_2 | s3_n
------+------+------+------+------
bb | 11 | 12 | 2 | 13
cc | | 22 | 2 | 23
dd | | | | 33
ee | | 42 | 2 |
(4 rows)
-- Test for propagation of nullability constraints into sub-joins
create temp table x (x1 int, x2 int);
insert into x values (1,11);
insert into x values (2,22);
insert into x values (3,null);
insert into x values (4,44);
insert into x values (5,null);
create temp table y (y1 int, y2 int);
insert into y values (1,111);
insert into y values (2,222);
insert into y values (3,333);
insert into y values (4,null);
select * from x;
x1 | x2
----+----
1 | 11
2 | 22
3 |
4 | 44
5 |
(5 rows)
select * from y;
y1 | y2
----+-----
1 | 111
2 | 222
3 | 333
4 |
(4 rows)
select * from x left join y on (x1 = y1 and x2 is not null);
x1 | x2 | y1 | y2
----+----+----+-----
1 | 11 | 1 | 111
2 | 22 | 2 | 222
3 | | |
4 | 44 | 4 |
5 | | |
(5 rows)
select * from x left join y on (x1 = y1 and y2 is not null);
x1 | x2 | y1 | y2
----+----+----+-----
1 | 11 | 1 | 111
2 | 22 | 2 | 222
3 | | 3 | 333
4 | 44 | |
5 | | |
(5 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
3 | | 3 | 333 | 3 |
4 | 44 | 4 | | 4 | 44
5 | | | | 5 |
(5 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1 and x2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
3 | | 3 | 333 | |
4 | 44 | 4 | | 4 | 44
5 | | | | |
(5 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1 and y2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
3 | | 3 | 333 | 3 |
4 | 44 | 4 | | |
5 | | | | |
(5 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1 and xx2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
3 | | 3 | 333 | |
4 | 44 | 4 | | 4 | 44
5 | | | | |
(5 rows)
-- these should NOT give the same answers as above
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1) where (x2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
4 | 44 | 4 | | 4 | 44
(3 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1) where (y2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
3 | | 3 | 333 | 3 |
(3 rows)
select * from (x left join y on (x1 = y1)) left join x xx(xx1,xx2)
on (x1 = xx1) where (xx2 is not null);
x1 | x2 | y1 | y2 | xx1 | xx2
----+----+----+-----+-----+-----
1 | 11 | 1 | 111 | 1 | 11
2 | 22 | 2 | 222 | 2 | 22
4 | 44 | 4 | | 4 | 44
(3 rows)
--
-- regression test: check for bug with propagation of implied equality
-- to outside an IN
--
select count(*) from tenk1 a where unique1 in
(select unique1 from tenk1 b join tenk1 c using (unique1)
where b.unique2 = 42);
count
-------
1
(1 row)
--
-- regression test: check for failure to generate a plan with multiple
-- degenerate IN clauses
--
select count(*) from tenk1 x where
x.unique1 in (select a.f1 from int4_tbl a,float8_tbl b where a.f1=b.f1) and
x.unique1 = 0 and
x.unique1 in (select aa.f1 from int4_tbl aa,float8_tbl bb where aa.f1=bb.f1);
count
-------
1
(1 row)
-- try that with GEQO too
begin;
set geqo = on;
set geqo_threshold = 2;
select count(*) from tenk1 x where
x.unique1 in (select a.f1 from int4_tbl a,float8_tbl b where a.f1=b.f1) and
x.unique1 = 0 and
x.unique1 in (select aa.f1 from int4_tbl aa,float8_tbl bb where aa.f1=bb.f1);
count
-------
1
(1 row)
rollback;
--
-- regression test: be sure we cope with proven-dummy append rels
--
explain (costs off)
select aa, bb, unique1, unique1
from tenk1 right join b on aa = unique1
where bb < bb and bb is null;
QUERY PLAN
--------------------------
Result
One-Time Filter: false
(2 rows)
select aa, bb, unique1, unique1
from tenk1 right join b on aa = unique1
where bb < bb and bb is null;
aa | bb | unique1 | unique1
----+----+---------+---------
(0 rows)
--
-- regression test: check handling of empty-FROM subquery underneath outer join
--
explain (costs off)
select * from int8_tbl i1 left join (int8_tbl i2 join
(select 123 as x) ss on i2.q1 = x) on i1.q2 = i2.q2
order by 1, 2;
QUERY PLAN
-------------------------------------------------
Sort
Sort Key: i1.q1, i1.q2
-> Hash Left Join
Hash Cond: (i1.q2 = i2.q2)
-> Seq Scan on int8_tbl i1
-> Hash
-> Hash Join
Hash Cond: (i2.q1 = (123))
-> Seq Scan on int8_tbl i2
-> Hash
-> Result
(11 rows)
select * from int8_tbl i1 left join (int8_tbl i2 join
(select 123 as x) ss on i2.q1 = x) on i1.q2 = i2.q2
order by 1, 2;
q1 | q2 | q1 | q2 | x
------------------+-------------------+-----+------------------+-----
123 | 456 | 123 | 456 | 123
123 | 4567890123456789 | 123 | 4567890123456789 | 123
4567890123456789 | -4567890123456789 | | |
4567890123456789 | 123 | | |
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 123
(5 rows)
--
-- regression test: check a case where join_clause_is_movable_into() gives
-- an imprecise result, causing an assertion failure
--
select count(*)
from
(select t3.tenthous as x1, coalesce(t1.stringu1, t2.stringu1) as x2
from tenk1 t1
left join tenk1 t2 on t1.unique1 = t2.unique1
join tenk1 t3 on t1.unique2 = t3.unique2) ss,
tenk1 t4,
tenk1 t5
where t4.thousand = t5.unique1 and ss.x1 = t4.tenthous and ss.x2 = t5.stringu1;
count
-------
1000
(1 row)
--
-- Clean up
--
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE t3;
DROP TABLE J1_TBL;
DROP TABLE J2_TBL;
-- Both DELETE and UPDATE allow the specification of additional tables
-- to "join" against to determine which rows should be modified.
CREATE TEMP TABLE t1 (a int, b int);
CREATE TEMP TABLE t2 (a int, b int);
CREATE TEMP TABLE t3 (x int, y int);
INSERT INTO t1 VALUES (5, 10);
INSERT INTO t1 VALUES (15, 20);
INSERT INTO t1 VALUES (100, 100);
INSERT INTO t1 VALUES (200, 1000);
INSERT INTO t2 VALUES (200, 2000);
INSERT INTO t3 VALUES (5, 20);
INSERT INTO t3 VALUES (6, 7);
INSERT INTO t3 VALUES (7, 8);
INSERT INTO t3 VALUES (500, 100);
DELETE FROM t3 USING t1 table1 WHERE t3.x = table1.a;
SELECT * FROM t3;
x | y
-----+-----
6 | 7
7 | 8
500 | 100
(3 rows)
DELETE FROM t3 USING t1 JOIN t2 USING (a) WHERE t3.x > t1.a;
SELECT * FROM t3;
x | y
---+---
6 | 7
7 | 8
(2 rows)
DELETE FROM t3 USING t3 t3_other WHERE t3.x = t3_other.x AND t3.y = t3_other.y;
SELECT * FROM t3;
x | y
---+---
(0 rows)
-- Test join against inheritance tree
create temp table t2a () inherits (t2);
insert into t2a values (200, 2001);
select * from t1 left join t2 on (t1.a = t2.a);
a | b | a | b
-----+------+-----+------
5 | 10 | |
15 | 20 | |
100 | 100 | |
200 | 1000 | 200 | 2000
200 | 1000 | 200 | 2001
(5 rows)
-- Test matching of column name with wrong alias
select t1.x from t1 join t3 on (t1.a = t3.x);
ERROR: column t1.x does not exist
LINE 1: select t1.x from t1 join t3 on (t1.a = t3.x);
^
HINT: Perhaps you meant to reference the column "t3.x".
--
-- regression test for 8.1 merge right join bug
--
CREATE TEMP TABLE tt1 ( tt1_id int4, joincol int4 );
INSERT INTO tt1 VALUES (1, 11);
INSERT INTO tt1 VALUES (2, NULL);
CREATE TEMP TABLE tt2 ( tt2_id int4, joincol int4 );
INSERT INTO tt2 VALUES (21, 11);
INSERT INTO tt2 VALUES (22, 11);
set enable_hashjoin to off;
set enable_nestloop to off;
-- these should give the same results
select tt1.*, tt2.* from tt1 left join tt2 on tt1.joincol = tt2.joincol;
tt1_id | joincol | tt2_id | joincol
--------+---------+--------+---------
1 | 11 | 21 | 11
1 | 11 | 22 | 11
2 | | |
(3 rows)
select tt1.*, tt2.* from tt2 right join tt1 on tt1.joincol = tt2.joincol;
tt1_id | joincol | tt2_id | joincol
--------+---------+--------+---------
1 | 11 | 21 | 11
1 | 11 | 22 | 11
2 | | |
(3 rows)
reset enable_hashjoin;
reset enable_nestloop;
--
-- regression test for bug #13908 (hash join with skew tuples & nbatch increase)
--
set work_mem to '64kB';
set enable_mergejoin to off;
explain (costs off)
select count(*) from tenk1 a, tenk1 b
where a.hundred = b.thousand and (b.fivethous % 10) < 10;
QUERY PLAN
------------------------------------------------------------
Aggregate
-> Hash Join
Hash Cond: (a.hundred = b.thousand)
-> Index Only Scan using tenk1_hundred on tenk1 a
-> Hash
-> Seq Scan on tenk1 b
Filter: ((fivethous % 10) < 10)
(7 rows)
select count(*) from tenk1 a, tenk1 b
where a.hundred = b.thousand and (b.fivethous % 10) < 10;
count
--------
100000
(1 row)
reset work_mem;
reset enable_mergejoin;
--
-- regression test for 8.2 bug with improper re-ordering of left joins
--
create temp table tt3(f1 int, f2 text);
insert into tt3 select x, repeat('xyzzy', 100) from generate_series(1,10000) x;
create index tt3i on tt3(f1);
analyze tt3;
create temp table tt4(f1 int);
insert into tt4 values (0),(1),(9999);
analyze tt4;
SELECT a.f1
FROM tt4 a
LEFT JOIN (
SELECT b.f1
FROM tt3 b LEFT JOIN tt3 c ON (b.f1 = c.f1)
WHERE c.f1 IS NULL
) AS d ON (a.f1 = d.f1)
WHERE d.f1 IS NULL;
f1
------
0
1
9999
(3 rows)
--
-- regression test for proper handling of outer joins within antijoins
--
create temp table tt4x(c1 int, c2 int, c3 int);
explain (costs off)
select * from tt4x t1
where not exists (
select 1 from tt4x t2
left join tt4x t3 on t2.c3 = t3.c1
left join ( select t5.c1 as c1
from tt4x t4 left join tt4x t5 on t4.c2 = t5.c1
) a1 on t3.c2 = a1.c1
where t1.c1 = t2.c2
);
QUERY PLAN
---------------------------------------------------------
Hash Anti Join
Hash Cond: (t1.c1 = t2.c2)
-> Seq Scan on tt4x t1
-> Hash
-> Merge Right Join
Merge Cond: (t5.c1 = t3.c2)
-> Merge Join
Merge Cond: (t4.c2 = t5.c1)
-> Sort
Sort Key: t4.c2
-> Seq Scan on tt4x t4
-> Sort
Sort Key: t5.c1
-> Seq Scan on tt4x t5
-> Sort
Sort Key: t3.c2
-> Merge Left Join
Merge Cond: (t2.c3 = t3.c1)
-> Sort
Sort Key: t2.c3
-> Seq Scan on tt4x t2
-> Sort
Sort Key: t3.c1
-> Seq Scan on tt4x t3
(24 rows)
--
-- regression test for problems of the sort depicted in bug #3494
--
create temp table tt5(f1 int, f2 int);
create temp table tt6(f1 int, f2 int);
insert into tt5 values(1, 10);
insert into tt5 values(1, 11);
insert into tt6 values(1, 9);
insert into tt6 values(1, 2);
insert into tt6 values(2, 9);
select * from tt5,tt6 where tt5.f1 = tt6.f1 and tt5.f1 = tt5.f2 - tt6.f2;
f1 | f2 | f1 | f2
----+----+----+----
1 | 10 | 1 | 9
(1 row)
--
-- regression test for problems of the sort depicted in bug #3588
--
create temp table xx (pkxx int);
create temp table yy (pkyy int, pkxx int);
insert into xx values (1);
insert into xx values (2);
insert into xx values (3);
insert into yy values (101, 1);
insert into yy values (201, 2);
insert into yy values (301, NULL);
select yy.pkyy as yy_pkyy, yy.pkxx as yy_pkxx, yya.pkyy as yya_pkyy,
xxa.pkxx as xxa_pkxx, xxb.pkxx as xxb_pkxx
from yy
left join (SELECT * FROM yy where pkyy = 101) as yya ON yy.pkyy = yya.pkyy
left join xx xxa on yya.pkxx = xxa.pkxx
left join xx xxb on coalesce (xxa.pkxx, 1) = xxb.pkxx;
yy_pkyy | yy_pkxx | yya_pkyy | xxa_pkxx | xxb_pkxx
---------+---------+----------+----------+----------
101 | 1 | 101 | 1 | 1
201 | 2 | | | 1
301 | | | | 1
(3 rows)
--
-- regression test for improper pushing of constants across outer-join clauses
-- (as seen in early 8.2.x releases)
--
create temp table zt1 (f1 int primary key);
create temp table zt2 (f2 int primary key);
create temp table zt3 (f3 int primary key);
insert into zt1 values(53);
insert into zt2 values(53);
select * from
zt2 left join zt3 on (f2 = f3)
left join zt1 on (f3 = f1)
where f2 = 53;
f2 | f3 | f1
----+----+----
53 | |
(1 row)
create temp view zv1 as select *,'dummy'::text AS junk from zt1;
select * from
zt2 left join zt3 on (f2 = f3)
left join zv1 on (f3 = f1)
where f2 = 53;
f2 | f3 | f1 | junk
----+----+----+------
53 | | |
(1 row)
--
-- regression test for improper extraction of OR indexqual conditions
-- (as seen in early 8.3.x releases)
--
select a.unique2, a.ten, b.tenthous, b.unique2, b.hundred
from tenk1 a left join tenk1 b on a.unique2 = b.tenthous
where a.unique1 = 42 and
((b.unique2 is null and a.ten = 2) or b.hundred = 3);
unique2 | ten | tenthous | unique2 | hundred
---------+-----+----------+---------+---------
(0 rows)
--
-- test proper positioning of one-time quals in EXISTS (8.4devel bug)
--
prepare foo(bool) as
select count(*) from tenk1 a left join tenk1 b
on (a.unique2 = b.unique1 and exists
(select 1 from tenk1 c where c.thousand = b.unique2 and $1));
execute foo(true);
count
-------
10000
(1 row)
execute foo(false);
count
-------
10000
(1 row)
--
-- test for sane behavior with noncanonical merge clauses, per bug #4926
--
begin;
set enable_mergejoin = 1;
set enable_hashjoin = 0;
set enable_nestloop = 0;
create temp table a (i integer);
create temp table b (x integer, y integer);
select * from a left join b on i = x and i = y and x = i;
i | x | y
---+---+---
(0 rows)
rollback;
--
-- test NULL behavior of whole-row Vars, per bug #5025
--
select t1.q2, count(t2.*)
from int8_tbl t1 left join int8_tbl t2 on (t1.q2 = t2.q1)
group by t1.q2 order by 1;
q2 | count
-------------------+-------
-4567890123456789 | 0
123 | 2
456 | 0
4567890123456789 | 6
(4 rows)
select t1.q2, count(t2.*)
from int8_tbl t1 left join (select * from int8_tbl) t2 on (t1.q2 = t2.q1)
group by t1.q2 order by 1;
q2 | count
-------------------+-------
-4567890123456789 | 0
123 | 2
456 | 0
4567890123456789 | 6
(4 rows)
select t1.q2, count(t2.*)
from int8_tbl t1 left join (select * from int8_tbl offset 0) t2 on (t1.q2 = t2.q1)
group by t1.q2 order by 1;
q2 | count
-------------------+-------
-4567890123456789 | 0
123 | 2
456 | 0
4567890123456789 | 6
(4 rows)
select t1.q2, count(t2.*)
from int8_tbl t1 left join
(select q1, case when q2=1 then 1 else q2 end as q2 from int8_tbl) t2
on (t1.q2 = t2.q1)
group by t1.q2 order by 1;
q2 | count
-------------------+-------
-4567890123456789 | 0
123 | 2
456 | 0
4567890123456789 | 6
(4 rows)
--
-- test incorrect failure to NULL pulled-up subexpressions
--
begin;
create temp table a (
code char not null,
constraint a_pk primary key (code)
);
create temp table b (
a char not null,
num integer not null,
constraint b_pk primary key (a, num)
);
create temp table c (
name char not null,
a char,
constraint c_pk primary key (name)
);
insert into a (code) values ('p');
insert into a (code) values ('q');
insert into b (a, num) values ('p', 1);
insert into b (a, num) values ('p', 2);
insert into c (name, a) values ('A', 'p');
insert into c (name, a) values ('B', 'q');
insert into c (name, a) values ('C', null);
select c.name, ss.code, ss.b_cnt, ss.const
from c left join
(select a.code, coalesce(b_grp.cnt, 0) as b_cnt, -1 as const
from a left join
(select count(1) as cnt, b.a from b group by b.a) as b_grp
on a.code = b_grp.a
) as ss
on (c.a = ss.code)
order by c.name;
name | code | b_cnt | const
------+------+-------+-------
A | p | 2 | -1
B | q | 0 | -1
C | | |
(3 rows)
rollback;
--
-- test incorrect handling of placeholders that only appear in targetlists,
-- per bug #6154
--
SELECT * FROM
( SELECT 1 as key1 ) sub1
LEFT JOIN
( SELECT sub3.key3, sub4.value2, COALESCE(sub4.value2, 66) as value3 FROM
( SELECT 1 as key3 ) sub3
LEFT JOIN
( SELECT sub5.key5, COALESCE(sub6.value1, 1) as value2 FROM
( SELECT 1 as key5 ) sub5
LEFT JOIN
( SELECT 2 as key6, 42 as value1 ) sub6
ON sub5.key5 = sub6.key6
) sub4
ON sub4.key5 = sub3.key3
) sub2
ON sub1.key1 = sub2.key3;
key1 | key3 | value2 | value3
------+------+--------+--------
1 | 1 | 1 | 1
(1 row)
-- test the path using join aliases, too
SELECT * FROM
( SELECT 1 as key1 ) sub1
LEFT JOIN
( SELECT sub3.key3, value2, COALESCE(value2, 66) as value3 FROM
( SELECT 1 as key3 ) sub3
LEFT JOIN
( SELECT sub5.key5, COALESCE(sub6.value1, 1) as value2 FROM
( SELECT 1 as key5 ) sub5
LEFT JOIN
( SELECT 2 as key6, 42 as value1 ) sub6
ON sub5.key5 = sub6.key6
) sub4
ON sub4.key5 = sub3.key3
) sub2
ON sub1.key1 = sub2.key3;
key1 | key3 | value2 | value3
------+------+--------+--------
1 | 1 | 1 | 1
(1 row)
--
-- test case where a PlaceHolderVar is used as a nestloop parameter
--
EXPLAIN (COSTS OFF)
SELECT qq, unique1
FROM
( SELECT COALESCE(q1, 0) AS qq FROM int8_tbl a ) AS ss1
FULL OUTER JOIN
( SELECT COALESCE(q2, -1) AS qq FROM int8_tbl b ) AS ss2
USING (qq)
INNER JOIN tenk1 c ON qq = unique2;
QUERY PLAN
---------------------------------------------------------------------------------------------------------
Nested Loop
-> Hash Full Join
Hash Cond: (COALESCE(a.q1, '0'::bigint) = COALESCE(b.q2, '-1'::bigint))
-> Seq Scan on int8_tbl a
-> Hash
-> Seq Scan on int8_tbl b
-> Index Scan using tenk1_unique2 on tenk1 c
Index Cond: (unique2 = COALESCE((COALESCE(a.q1, '0'::bigint)), (COALESCE(b.q2, '-1'::bigint))))
(8 rows)
SELECT qq, unique1
FROM
( SELECT COALESCE(q1, 0) AS qq FROM int8_tbl a ) AS ss1
FULL OUTER JOIN
( SELECT COALESCE(q2, -1) AS qq FROM int8_tbl b ) AS ss2
USING (qq)
INNER JOIN tenk1 c ON qq = unique2;
qq | unique1
-----+---------
123 | 4596
123 | 4596
456 | 7318
(3 rows)
--
-- nested nestloops can require nested PlaceHolderVars
--
create temp table nt1 (
id int primary key,
a1 boolean,
a2 boolean
);
create temp table nt2 (
id int primary key,
nt1_id int,
b1 boolean,
b2 boolean,
foreign key (nt1_id) references nt1(id)
);
create temp table nt3 (
id int primary key,
nt2_id int,
c1 boolean,
foreign key (nt2_id) references nt2(id)
);
insert into nt1 values (1,true,true);
insert into nt1 values (2,true,false);
insert into nt1 values (3,false,false);
insert into nt2 values (1,1,true,true);
insert into nt2 values (2,2,true,false);
insert into nt2 values (3,3,false,false);
insert into nt3 values (1,1,true);
insert into nt3 values (2,2,false);
insert into nt3 values (3,3,true);
explain (costs off)
select nt3.id
from nt3 as nt3
left join
(select nt2.*, (nt2.b1 and ss1.a3) AS b3
from nt2 as nt2
left join
(select nt1.*, (nt1.id is not null) as a3 from nt1) as ss1
on ss1.id = nt2.nt1_id
) as ss2
on ss2.id = nt3.nt2_id
where nt3.id = 1 and ss2.b3;
QUERY PLAN
-----------------------------------------------
Nested Loop
-> Nested Loop
-> Index Scan using nt3_pkey on nt3
Index Cond: (id = 1)
-> Index Scan using nt2_pkey on nt2
Index Cond: (id = nt3.nt2_id)
-> Index Only Scan using nt1_pkey on nt1
Index Cond: (id = nt2.nt1_id)
Filter: (nt2.b1 AND (id IS NOT NULL))
(9 rows)
select nt3.id
from nt3 as nt3
left join
(select nt2.*, (nt2.b1 and ss1.a3) AS b3
from nt2 as nt2
left join
(select nt1.*, (nt1.id is not null) as a3 from nt1) as ss1
on ss1.id = nt2.nt1_id
) as ss2
on ss2.id = nt3.nt2_id
where nt3.id = 1 and ss2.b3;
id
----
1
(1 row)
--
-- test case where a PlaceHolderVar is propagated into a subquery
--
explain (costs off)
select * from
int8_tbl t1 left join
(select q1 as x, 42 as y from int8_tbl t2) ss
on t1.q2 = ss.x
where
1 = (select 1 from int8_tbl t3 where ss.y is not null limit 1)
order by 1,2;
QUERY PLAN
-----------------------------------------------------------
Sort
Sort Key: t1.q1, t1.q2
-> Hash Left Join
Hash Cond: (t1.q2 = t2.q1)
Filter: (1 = (SubPlan 1))
-> Seq Scan on int8_tbl t1
-> Hash
-> Seq Scan on int8_tbl t2
SubPlan 1
-> Limit
-> Result
One-Time Filter: ((42) IS NOT NULL)
-> Seq Scan on int8_tbl t3
(13 rows)
select * from
int8_tbl t1 left join
(select q1 as x, 42 as y from int8_tbl t2) ss
on t1.q2 = ss.x
where
1 = (select 1 from int8_tbl t3 where ss.y is not null limit 1)
order by 1,2;
q1 | q2 | x | y
------------------+------------------+------------------+----
123 | 4567890123456789 | 4567890123456789 | 42
123 | 4567890123456789 | 4567890123456789 | 42
123 | 4567890123456789 | 4567890123456789 | 42
4567890123456789 | 123 | 123 | 42
4567890123456789 | 123 | 123 | 42
4567890123456789 | 4567890123456789 | 4567890123456789 | 42
4567890123456789 | 4567890123456789 | 4567890123456789 | 42
4567890123456789 | 4567890123456789 | 4567890123456789 | 42
(8 rows)
--
-- test the corner cases FULL JOIN ON TRUE and FULL JOIN ON FALSE
--
select * from int4_tbl a full join int4_tbl b on true;
f1 | f1
-------------+-------------
0 | 0
0 | 123456
0 | -123456
0 | 2147483647
0 | -2147483647
123456 | 0
123456 | 123456
123456 | -123456
123456 | 2147483647
123456 | -2147483647
-123456 | 0
-123456 | 123456
-123456 | -123456
-123456 | 2147483647
-123456 | -2147483647
2147483647 | 0
2147483647 | 123456
2147483647 | -123456
2147483647 | 2147483647
2147483647 | -2147483647
-2147483647 | 0
-2147483647 | 123456
-2147483647 | -123456
-2147483647 | 2147483647
-2147483647 | -2147483647
(25 rows)
select * from int4_tbl a full join int4_tbl b on false;
f1 | f1
-------------+-------------
| 0
| 123456
| -123456
| 2147483647
| -2147483647
0 |
123456 |
-123456 |
2147483647 |
-2147483647 |
(10 rows)
--
-- test for ability to use a cartesian join when necessary
--
explain (costs off)
select * from
tenk1 join int4_tbl on f1 = twothousand,
int4(sin(1)) q1,
int4(sin(0)) q2
where q1 = thousand or q2 = thousand;
QUERY PLAN
------------------------------------------------------------------------
Hash Join
Hash Cond: (tenk1.twothousand = int4_tbl.f1)
-> Nested Loop
-> Nested Loop
-> Function Scan on q1
-> Function Scan on q2
-> Bitmap Heap Scan on tenk1
Recheck Cond: ((q1.q1 = thousand) OR (q2.q2 = thousand))
-> BitmapOr
-> Bitmap Index Scan on tenk1_thous_tenthous
Index Cond: (q1.q1 = thousand)
-> Bitmap Index Scan on tenk1_thous_tenthous
Index Cond: (q2.q2 = thousand)
-> Hash
-> Seq Scan on int4_tbl
(15 rows)
explain (costs off)
select * from
tenk1 join int4_tbl on f1 = twothousand,
int4(sin(1)) q1,
int4(sin(0)) q2
where thousand = (q1 + q2);
QUERY PLAN
--------------------------------------------------------------
Hash Join
Hash Cond: (tenk1.twothousand = int4_tbl.f1)
-> Nested Loop
-> Nested Loop
-> Function Scan on q1
-> Function Scan on q2
-> Bitmap Heap Scan on tenk1
Recheck Cond: (thousand = (q1.q1 + q2.q2))
-> Bitmap Index Scan on tenk1_thous_tenthous
Index Cond: (thousand = (q1.q1 + q2.q2))
-> Hash
-> Seq Scan on int4_tbl
(12 rows)
--
-- test ability to generate a suitable plan for a star-schema query
--
explain (costs off)
select * from
tenk1, int8_tbl a, int8_tbl b
where thousand = a.q1 and tenthous = b.q1 and a.q2 = 1 and b.q2 = 2;
QUERY PLAN
---------------------------------------------------------------------
Nested Loop
-> Seq Scan on int8_tbl b
Filter: (q2 = 2)
-> Nested Loop
-> Seq Scan on int8_tbl a
Filter: (q2 = 1)
-> Index Scan using tenk1_thous_tenthous on tenk1
Index Cond: ((thousand = a.q1) AND (tenthous = b.q1))
(8 rows)
--
-- test a corner case in which we shouldn't apply the star-schema optimization
--
explain (costs off)
select t1.unique2, t1.stringu1, t2.unique1, t2.stringu2 from
tenk1 t1
inner join int4_tbl i1
left join (select v1.x2, v2.y1, 11 AS d1
from (values(1,0)) v1(x1,x2)
left join (values(3,1)) v2(y1,y2)
on v1.x1 = v2.y2) subq1
on (i1.f1 = subq1.x2)
on (t1.unique2 = subq1.d1)
left join tenk1 t2
on (subq1.y1 = t2.unique1)
where t1.unique2 < 42 and t1.stringu1 > t2.stringu2;
QUERY PLAN
-----------------------------------------------------------------------
Nested Loop
Join Filter: (t1.stringu1 > t2.stringu2)
-> Nested Loop
Join Filter: ((0) = i1.f1)
-> Nested Loop
-> Nested Loop
Join Filter: ((1) = (1))
-> Result
-> Result
-> Index Scan using tenk1_unique2 on tenk1 t1
Index Cond: ((unique2 = (11)) AND (unique2 < 42))
-> Seq Scan on int4_tbl i1
-> Index Scan using tenk1_unique1 on tenk1 t2
Index Cond: (unique1 = (3))
(14 rows)
select t1.unique2, t1.stringu1, t2.unique1, t2.stringu2 from
tenk1 t1
inner join int4_tbl i1
left join (select v1.x2, v2.y1, 11 AS d1
from (values(1,0)) v1(x1,x2)
left join (values(3,1)) v2(y1,y2)
on v1.x1 = v2.y2) subq1
on (i1.f1 = subq1.x2)
on (t1.unique2 = subq1.d1)
left join tenk1 t2
on (subq1.y1 = t2.unique1)
where t1.unique2 < 42 and t1.stringu1 > t2.stringu2;
unique2 | stringu1 | unique1 | stringu2
---------+----------+---------+----------
11 | WFAAAA | 3 | LKIAAA
(1 row)
-- variant that isn't quite a star-schema case
select ss1.d1 from
tenk1 as t1
inner join tenk1 as t2
on t1.tenthous = t2.ten
inner join
int8_tbl as i8
left join int4_tbl as i4
inner join (select 64::information_schema.cardinal_number as d1
from tenk1 t3,
lateral (select abs(t3.unique1) + random()) ss0(x)
where t3.fivethous < 0) as ss1
on i4.f1 = ss1.d1
on i8.q1 = i4.f1
on t1.tenthous = ss1.d1
where t1.unique1 < i4.f1;
d1
----
(0 rows)
--
-- test extraction of restriction OR clauses from join OR clause
-- (we used to only do this for indexable clauses)
--
explain (costs off)
select * from tenk1 a join tenk1 b on
(a.unique1 = 1 and b.unique1 = 2) or (a.unique2 = 3 and b.hundred = 4);
QUERY PLAN
-------------------------------------------------------------------------------------------------
Nested Loop
Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = 3) AND (b.hundred = 4)))
-> Bitmap Heap Scan on tenk1 b
Recheck Cond: ((unique1 = 2) OR (hundred = 4))
-> BitmapOr
-> Bitmap Index Scan on tenk1_unique1
Index Cond: (unique1 = 2)
-> Bitmap Index Scan on tenk1_hundred
Index Cond: (hundred = 4)
-> Materialize
-> Bitmap Heap Scan on tenk1 a
Recheck Cond: ((unique1 = 1) OR (unique2 = 3))
-> BitmapOr
-> Bitmap Index Scan on tenk1_unique1
Index Cond: (unique1 = 1)
-> Bitmap Index Scan on tenk1_unique2
Index Cond: (unique2 = 3)
(17 rows)
explain (costs off)
select * from tenk1 a join tenk1 b on
(a.unique1 = 1 and b.unique1 = 2) or (a.unique2 = 3 and b.ten = 4);
QUERY PLAN
---------------------------------------------------------------------------------------------
Nested Loop
Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR ((a.unique2 = 3) AND (b.ten = 4)))
-> Seq Scan on tenk1 b
Filter: ((unique1 = 2) OR (ten = 4))
-> Materialize
-> Bitmap Heap Scan on tenk1 a
Recheck Cond: ((unique1 = 1) OR (unique2 = 3))
-> BitmapOr
-> Bitmap Index Scan on tenk1_unique1
Index Cond: (unique1 = 1)
-> Bitmap Index Scan on tenk1_unique2
Index Cond: (unique2 = 3)
(12 rows)
explain (costs off)
select * from tenk1 a join tenk1 b on
(a.unique1 = 1 and b.unique1 = 2) or
((a.unique2 = 3 or a.unique2 = 7) and b.hundred = 4);
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Nested Loop
Join Filter: (((a.unique1 = 1) AND (b.unique1 = 2)) OR (((a.unique2 = 3) OR (a.unique2 = 7)) AND (b.hundred = 4)))
-> Bitmap Heap Scan on tenk1 b
Recheck Cond: ((unique1 = 2) OR (hundred = 4))
-> BitmapOr
-> Bitmap Index Scan on tenk1_unique1
Index Cond: (unique1 = 2)
-> Bitmap Index Scan on tenk1_hundred
Index Cond: (hundred = 4)
-> Materialize
-> Bitmap Heap Scan on tenk1 a
Recheck Cond: ((unique1 = 1) OR (unique2 = 3) OR (unique2 = 7))
-> BitmapOr
-> Bitmap Index Scan on tenk1_unique1
Index Cond: (unique1 = 1)
-> Bitmap Index Scan on tenk1_unique2
Index Cond: (unique2 = 3)
-> Bitmap Index Scan on tenk1_unique2
Index Cond: (unique2 = 7)
(19 rows)
--
-- test placement of movable quals in a parameterized join tree
--
explain (costs off)
select * from tenk1 t1 left join
(tenk1 t2 join tenk1 t3 on t2.thousand = t3.unique2)
on t1.hundred = t2.hundred and t1.ten = t3.ten
where t1.unique1 = 1;
QUERY PLAN
--------------------------------------------------------
Nested Loop Left Join
-> Index Scan using tenk1_unique1 on tenk1 t1
Index Cond: (unique1 = 1)
-> Nested Loop
Join Filter: (t1.ten = t3.ten)
-> Bitmap Heap Scan on tenk1 t2
Recheck Cond: (t1.hundred = hundred)
-> Bitmap Index Scan on tenk1_hundred
Index Cond: (t1.hundred = hundred)
-> Index Scan using tenk1_unique2 on tenk1 t3
Index Cond: (unique2 = t2.thousand)
(11 rows)
explain (costs off)
select * from tenk1 t1 left join
(tenk1 t2 join tenk1 t3 on t2.thousand = t3.unique2)
on t1.hundred = t2.hundred and t1.ten + t2.ten = t3.ten
where t1.unique1 = 1;
QUERY PLAN
--------------------------------------------------------
Nested Loop Left Join
-> Index Scan using tenk1_unique1 on tenk1 t1
Index Cond: (unique1 = 1)
-> Nested Loop
Join Filter: ((t1.ten + t2.ten) = t3.ten)
-> Bitmap Heap Scan on tenk1 t2
Recheck Cond: (t1.hundred = hundred)
-> Bitmap Index Scan on tenk1_hundred
Index Cond: (t1.hundred = hundred)
-> Index Scan using tenk1_unique2 on tenk1 t3
Index Cond: (unique2 = t2.thousand)
(11 rows)
explain (costs off)
select count(*) from
tenk1 a join tenk1 b on a.unique1 = b.unique2
left join tenk1 c on a.unique2 = b.unique1 and c.thousand = a.thousand
join int4_tbl on b.thousand = f1;
QUERY PLAN
-------------------------------------------------------------------------
Aggregate
-> Nested Loop Left Join
Join Filter: (a.unique2 = b.unique1)
-> Nested Loop
-> Nested Loop
-> Seq Scan on int4_tbl
-> Bitmap Heap Scan on tenk1 b
Recheck Cond: (thousand = int4_tbl.f1)
-> Bitmap Index Scan on tenk1_thous_tenthous
Index Cond: (thousand = int4_tbl.f1)
-> Index Scan using tenk1_unique1 on tenk1 a
Index Cond: (unique1 = b.unique2)
-> Index Only Scan using tenk1_thous_tenthous on tenk1 c
Index Cond: (thousand = a.thousand)
(14 rows)
select count(*) from
tenk1 a join tenk1 b on a.unique1 = b.unique2
left join tenk1 c on a.unique2 = b.unique1 and c.thousand = a.thousand
join int4_tbl on b.thousand = f1;
count
-------
10
(1 row)
explain (costs off)
select b.unique1 from
tenk1 a join tenk1 b on a.unique1 = b.unique2
left join tenk1 c on b.unique1 = 42 and c.thousand = a.thousand
join int4_tbl i1 on b.thousand = f1
right join int4_tbl i2 on i2.f1 = b.tenthous
order by 1;
QUERY PLAN
-----------------------------------------------------------------------------------------
Sort
Sort Key: b.unique1
-> Nested Loop Left Join
-> Seq Scan on int4_tbl i2
-> Nested Loop Left Join
Join Filter: (b.unique1 = 42)
-> Nested Loop
-> Nested Loop
-> Seq Scan on int4_tbl i1
-> Index Scan using tenk1_thous_tenthous on tenk1 b
Index Cond: ((thousand = i1.f1) AND (i2.f1 = tenthous))
-> Index Scan using tenk1_unique1 on tenk1 a
Index Cond: (unique1 = b.unique2)
-> Index Only Scan using tenk1_thous_tenthous on tenk1 c
Index Cond: (thousand = a.thousand)
(15 rows)
select b.unique1 from
tenk1 a join tenk1 b on a.unique1 = b.unique2
left join tenk1 c on b.unique1 = 42 and c.thousand = a.thousand
join int4_tbl i1 on b.thousand = f1
right join int4_tbl i2 on i2.f1 = b.tenthous
order by 1;
unique1
---------
0
(5 rows)
explain (costs off)
select * from
(
select unique1, q1, coalesce(unique1, -1) + q1 as fault
from int8_tbl left join tenk1 on (q2 = unique2)
) ss
where fault = 122
order by fault;
QUERY PLAN
--------------------------------------------------------------------------
Nested Loop Left Join
Filter: ((COALESCE(tenk1.unique1, '-1'::integer) + int8_tbl.q1) = 122)
-> Seq Scan on int8_tbl
-> Index Scan using tenk1_unique2 on tenk1
Index Cond: (int8_tbl.q2 = unique2)
(5 rows)
select * from
(
select unique1, q1, coalesce(unique1, -1) + q1 as fault
from int8_tbl left join tenk1 on (q2 = unique2)
) ss
where fault = 122
order by fault;
unique1 | q1 | fault
---------+-----+-------
| 123 | 122
(1 row)
--
-- test handling of potential equivalence clauses above outer joins
--
explain (costs off)
select q1, unique2, thousand, hundred
from int8_tbl a left join tenk1 b on q1 = unique2
where coalesce(thousand,123) = q1 and q1 = coalesce(hundred,123);
QUERY PLAN
--------------------------------------------------------------------------------------
Nested Loop Left Join
Filter: ((COALESCE(b.thousand, 123) = a.q1) AND (a.q1 = COALESCE(b.hundred, 123)))
-> Seq Scan on int8_tbl a
-> Index Scan using tenk1_unique2 on tenk1 b
Index Cond: (a.q1 = unique2)
(5 rows)
select q1, unique2, thousand, hundred
from int8_tbl a left join tenk1 b on q1 = unique2
where coalesce(thousand,123) = q1 and q1 = coalesce(hundred,123);
q1 | unique2 | thousand | hundred
----+---------+----------+---------
(0 rows)
explain (costs off)
select f1, unique2, case when unique2 is null then f1 else 0 end
from int4_tbl a left join tenk1 b on f1 = unique2
where (case when unique2 is null then f1 else 0 end) = 0;
QUERY PLAN
--------------------------------------------------------------------
Nested Loop Left Join
Filter: (CASE WHEN (b.unique2 IS NULL) THEN a.f1 ELSE 0 END = 0)
-> Seq Scan on int4_tbl a
-> Index Only Scan using tenk1_unique2 on tenk1 b
Index Cond: (unique2 = a.f1)
(5 rows)
select f1, unique2, case when unique2 is null then f1 else 0 end
from int4_tbl a left join tenk1 b on f1 = unique2
where (case when unique2 is null then f1 else 0 end) = 0;
f1 | unique2 | case
----+---------+------
0 | 0 | 0
(1 row)
--
-- another case with equivalence clauses above outer joins (bug #8591)
--
explain (costs off)
select a.unique1, b.unique1, c.unique1, coalesce(b.twothousand, a.twothousand)
from tenk1 a left join tenk1 b on b.thousand = a.unique1 left join tenk1 c on c.unique2 = coalesce(b.twothousand, a.twothousand)
where a.unique2 < 10 and coalesce(b.twothousand, a.twothousand) = 44;
QUERY PLAN
---------------------------------------------------------------------------------------------
Nested Loop Left Join
-> Nested Loop Left Join
Filter: (COALESCE(b.twothousand, a.twothousand) = 44)
-> Index Scan using tenk1_unique2 on tenk1 a
Index Cond: (unique2 < 10)
-> Bitmap Heap Scan on tenk1 b
Recheck Cond: (thousand = a.unique1)
-> Bitmap Index Scan on tenk1_thous_tenthous
Index Cond: (thousand = a.unique1)
-> Index Scan using tenk1_unique2 on tenk1 c
Index Cond: ((unique2 = COALESCE(b.twothousand, a.twothousand)) AND (unique2 = 44))
(11 rows)
select a.unique1, b.unique1, c.unique1, coalesce(b.twothousand, a.twothousand)
from tenk1 a left join tenk1 b on b.thousand = a.unique1 left join tenk1 c on c.unique2 = coalesce(b.twothousand, a.twothousand)
where a.unique2 < 10 and coalesce(b.twothousand, a.twothousand) = 44;
unique1 | unique1 | unique1 | coalesce
---------+---------+---------+----------
(0 rows)
--
-- check handling of join aliases when flattening multiple levels of subquery
--
explain (verbose, costs off)
select foo1.join_key as foo1_id, foo3.join_key AS foo3_id, bug_field from
(values (0),(1)) foo1(join_key)
left join
(select join_key, bug_field from
(select ss1.join_key, ss1.bug_field from
(select f1 as join_key, 666 as bug_field from int4_tbl i1) ss1
) foo2
left join
(select unique2 as join_key from tenk1 i2) ss2
using (join_key)
) foo3
using (join_key);
QUERY PLAN
--------------------------------------------------------------------------
Nested Loop Left Join
Output: "*VALUES*".column1, i1.f1, (666)
Join Filter: ("*VALUES*".column1 = i1.f1)
-> Values Scan on "*VALUES*"
Output: "*VALUES*".column1
-> Materialize
Output: i1.f1, (666)
-> Nested Loop Left Join
Output: i1.f1, 666
-> Seq Scan on public.int4_tbl i1
Output: i1.f1
-> Index Only Scan using tenk1_unique2 on public.tenk1 i2
Output: i2.unique2
Index Cond: (i2.unique2 = i1.f1)
(14 rows)
select foo1.join_key as foo1_id, foo3.join_key AS foo3_id, bug_field from
(values (0),(1)) foo1(join_key)
left join
(select join_key, bug_field from
(select ss1.join_key, ss1.bug_field from
(select f1 as join_key, 666 as bug_field from int4_tbl i1) ss1
) foo2
left join
(select unique2 as join_key from tenk1 i2) ss2
using (join_key)
) foo3
using (join_key);
foo1_id | foo3_id | bug_field
---------+---------+-----------
0 | 0 | 666
1 | |
(2 rows)
--
-- test successful handling of nested outer joins with degenerate join quals
--
explain (verbose, costs off)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
QUERY PLAN
----------------------------------------------------------------------
Hash Left Join
Output: t1.f1
Hash Cond: (i8.q2 = i4.f1)
-> Nested Loop Left Join
Output: t1.f1, i8.q2
Join Filter: (t1.f1 = '***'::text)
-> Seq Scan on public.text_tbl t1
Output: t1.f1
-> Materialize
Output: i8.q2
-> Hash Right Join
Output: i8.q2
Hash Cond: ((NULL::integer) = i8b1.q2)
-> Hash Left Join
Output: i8.q2, (NULL::integer)
Hash Cond: (i8.q1 = i8b2.q1)
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
-> Hash
Output: i8b2.q1, (NULL::integer)
-> Seq Scan on public.int8_tbl i8b2
Output: i8b2.q1, NULL::integer
-> Hash
Output: i8b1.q2
-> Seq Scan on public.int8_tbl i8b1
Output: i8b1.q2
-> Hash
Output: i4.f1
-> Seq Scan on public.int4_tbl i4
Output: i4.f1
(30 rows)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
f1
-------------------
doh!
hi de ho neighbor
(2 rows)
explain (verbose, costs off)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2, int4_tbl i4b2) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
QUERY PLAN
----------------------------------------------------------------------------
Hash Left Join
Output: t1.f1
Hash Cond: (i8.q2 = i4.f1)
-> Nested Loop Left Join
Output: t1.f1, i8.q2
Join Filter: (t1.f1 = '***'::text)
-> Seq Scan on public.text_tbl t1
Output: t1.f1
-> Materialize
Output: i8.q2
-> Hash Right Join
Output: i8.q2
Hash Cond: ((NULL::integer) = i8b1.q2)
-> Hash Right Join
Output: i8.q2, (NULL::integer)
Hash Cond: (i8b2.q1 = i8.q1)
-> Nested Loop
Output: i8b2.q1, NULL::integer
-> Seq Scan on public.int8_tbl i8b2
Output: i8b2.q1, i8b2.q2
-> Materialize
-> Seq Scan on public.int4_tbl i4b2
-> Hash
Output: i8.q1, i8.q2
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
-> Hash
Output: i8b1.q2
-> Seq Scan on public.int8_tbl i8b1
Output: i8b1.q2
-> Hash
Output: i4.f1
-> Seq Scan on public.int4_tbl i4
Output: i4.f1
(34 rows)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2, int4_tbl i4b2) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
f1
-------------------
doh!
hi de ho neighbor
(2 rows)
explain (verbose, costs off)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2, int4_tbl i4b2
where q1 = f1) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
QUERY PLAN
----------------------------------------------------------------------------
Hash Left Join
Output: t1.f1
Hash Cond: (i8.q2 = i4.f1)
-> Nested Loop Left Join
Output: t1.f1, i8.q2
Join Filter: (t1.f1 = '***'::text)
-> Seq Scan on public.text_tbl t1
Output: t1.f1
-> Materialize
Output: i8.q2
-> Hash Right Join
Output: i8.q2
Hash Cond: ((NULL::integer) = i8b1.q2)
-> Hash Right Join
Output: i8.q2, (NULL::integer)
Hash Cond: (i8b2.q1 = i8.q1)
-> Hash Join
Output: i8b2.q1, NULL::integer
Hash Cond: (i8b2.q1 = i4b2.f1)
-> Seq Scan on public.int8_tbl i8b2
Output: i8b2.q1, i8b2.q2
-> Hash
Output: i4b2.f1
-> Seq Scan on public.int4_tbl i4b2
Output: i4b2.f1
-> Hash
Output: i8.q1, i8.q2
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
-> Hash
Output: i8b1.q2
-> Seq Scan on public.int8_tbl i8b1
Output: i8b1.q2
-> Hash
Output: i4.f1
-> Seq Scan on public.int4_tbl i4
Output: i4.f1
(37 rows)
select t1.* from
text_tbl t1
left join (select *, '***'::text as d1 from int8_tbl i8b1) b1
left join int8_tbl i8
left join (select *, null::int as d2 from int8_tbl i8b2, int4_tbl i4b2
where q1 = f1) b2
on (i8.q1 = b2.q1)
on (b2.d2 = b1.q2)
on (t1.f1 = b1.d1)
left join int4_tbl i4
on (i8.q2 = i4.f1);
f1
-------------------
doh!
hi de ho neighbor
(2 rows)
explain (verbose, costs off)
select * from
text_tbl t1
inner join int8_tbl i8
on i8.q2 = 456
right join text_tbl t2
on t1.f1 = 'doh!'
left join int4_tbl i4
on i8.q1 = i4.f1;
QUERY PLAN
--------------------------------------------------------
Nested Loop Left Join
Output: t1.f1, i8.q1, i8.q2, t2.f1, i4.f1
-> Seq Scan on public.text_tbl t2
Output: t2.f1
-> Materialize
Output: i8.q1, i8.q2, i4.f1, t1.f1
-> Nested Loop
Output: i8.q1, i8.q2, i4.f1, t1.f1
-> Nested Loop Left Join
Output: i8.q1, i8.q2, i4.f1
Join Filter: (i8.q1 = i4.f1)
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
Filter: (i8.q2 = 456)
-> Seq Scan on public.int4_tbl i4
Output: i4.f1
-> Seq Scan on public.text_tbl t1
Output: t1.f1
Filter: (t1.f1 = 'doh!'::text)
(19 rows)
select * from
text_tbl t1
inner join int8_tbl i8
on i8.q2 = 456
right join text_tbl t2
on t1.f1 = 'doh!'
left join int4_tbl i4
on i8.q1 = i4.f1;
f1 | q1 | q2 | f1 | f1
------+-----+-----+-------------------+----
doh! | 123 | 456 | doh! |
doh! | 123 | 456 | hi de ho neighbor |
(2 rows)
--
-- test for appropriate join order in the presence of lateral references
--
explain (verbose, costs off)
select * from
text_tbl t1
left join int8_tbl i8
on i8.q2 = 123,
lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss
where t1.f1 = ss.f1;
QUERY PLAN
--------------------------------------------------
Nested Loop
Output: t1.f1, i8.q1, i8.q2, (i8.q1), t2.f1
Join Filter: (t1.f1 = t2.f1)
-> Nested Loop Left Join
Output: t1.f1, i8.q1, i8.q2
-> Seq Scan on public.text_tbl t1
Output: t1.f1
-> Materialize
Output: i8.q1, i8.q2
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
Filter: (i8.q2 = 123)
-> Limit
Output: (i8.q1), t2.f1
-> Seq Scan on public.text_tbl t2
Output: i8.q1, t2.f1
(16 rows)
select * from
text_tbl t1
left join int8_tbl i8
on i8.q2 = 123,
lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss
where t1.f1 = ss.f1;
f1 | q1 | q2 | q1 | f1
------+------------------+-----+------------------+------
doh! | 4567890123456789 | 123 | 4567890123456789 | doh!
(1 row)
explain (verbose, costs off)
select * from
text_tbl t1
left join int8_tbl i8
on i8.q2 = 123,
lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss1,
lateral (select ss1.* from text_tbl t3 limit 1) as ss2
where t1.f1 = ss2.f1;
QUERY PLAN
-------------------------------------------------------------------
Nested Loop
Output: t1.f1, i8.q1, i8.q2, (i8.q1), t2.f1, ((i8.q1)), (t2.f1)
Join Filter: (t1.f1 = (t2.f1))
-> Nested Loop
Output: t1.f1, i8.q1, i8.q2, (i8.q1), t2.f1
-> Nested Loop Left Join
Output: t1.f1, i8.q1, i8.q2
-> Seq Scan on public.text_tbl t1
Output: t1.f1
-> Materialize
Output: i8.q1, i8.q2
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
Filter: (i8.q2 = 123)
-> Limit
Output: (i8.q1), t2.f1
-> Seq Scan on public.text_tbl t2
Output: i8.q1, t2.f1
-> Limit
Output: ((i8.q1)), (t2.f1)
-> Seq Scan on public.text_tbl t3
Output: (i8.q1), t2.f1
(22 rows)
select * from
text_tbl t1
left join int8_tbl i8
on i8.q2 = 123,
lateral (select i8.q1, t2.f1 from text_tbl t2 limit 1) as ss1,
lateral (select ss1.* from text_tbl t3 limit 1) as ss2
where t1.f1 = ss2.f1;
f1 | q1 | q2 | q1 | f1 | q1 | f1
------+------------------+-----+------------------+------+------------------+------
doh! | 4567890123456789 | 123 | 4567890123456789 | doh! | 4567890123456789 | doh!
(1 row)
explain (verbose, costs off)
select 1 from
text_tbl as tt1
inner join text_tbl as tt2 on (tt1.f1 = 'foo')
left join text_tbl as tt3 on (tt3.f1 = 'foo')
left join text_tbl as tt4 on (tt3.f1 = tt4.f1),
lateral (select tt4.f1 as c0 from text_tbl as tt5 limit 1) as ss1
where tt1.f1 = ss1.c0;
QUERY PLAN
----------------------------------------------------------
Nested Loop
Output: 1
-> Nested Loop Left Join
Output: tt1.f1, tt4.f1
-> Nested Loop
Output: tt1.f1
-> Seq Scan on public.text_tbl tt1
Output: tt1.f1
Filter: (tt1.f1 = 'foo'::text)
-> Seq Scan on public.text_tbl tt2
Output: tt2.f1
-> Materialize
Output: tt4.f1
-> Nested Loop Left Join
Output: tt4.f1
Join Filter: (tt3.f1 = tt4.f1)
-> Seq Scan on public.text_tbl tt3
Output: tt3.f1
Filter: (tt3.f1 = 'foo'::text)
-> Seq Scan on public.text_tbl tt4
Output: tt4.f1
Filter: (tt4.f1 = 'foo'::text)
-> Subquery Scan on ss1
Output: ss1.c0
Filter: (ss1.c0 = 'foo'::text)
-> Limit
Output: (tt4.f1)
-> Seq Scan on public.text_tbl tt5
Output: tt4.f1
(29 rows)
select 1 from
text_tbl as tt1
inner join text_tbl as tt2 on (tt1.f1 = 'foo')
left join text_tbl as tt3 on (tt3.f1 = 'foo')
left join text_tbl as tt4 on (tt3.f1 = tt4.f1),
lateral (select tt4.f1 as c0 from text_tbl as tt5 limit 1) as ss1
where tt1.f1 = ss1.c0;
?column?
----------
(0 rows)
--
-- check a case in which a PlaceHolderVar forces join order
--
explain (verbose, costs off)
select ss2.* from
int4_tbl i41
left join int8_tbl i8
join (select i42.f1 as c1, i43.f1 as c2, 42 as c3
from int4_tbl i42, int4_tbl i43) ss1
on i8.q1 = ss1.c2
on i41.f1 = ss1.c1,
lateral (select i41.*, i8.*, ss1.* from text_tbl limit 1) ss2
where ss1.c2 = 0;
QUERY PLAN
------------------------------------------------------------------------
Nested Loop
Output: (i41.f1), (i8.q1), (i8.q2), (i42.f1), (i43.f1), ((42))
-> Hash Join
Output: i41.f1, i42.f1, i8.q1, i8.q2, i43.f1, 42
Hash Cond: (i41.f1 = i42.f1)
-> Nested Loop
Output: i8.q1, i8.q2, i43.f1, i41.f1
-> Nested Loop
Output: i8.q1, i8.q2, i43.f1
-> Seq Scan on public.int8_tbl i8
Output: i8.q1, i8.q2
Filter: (i8.q1 = 0)
-> Seq Scan on public.int4_tbl i43
Output: i43.f1
Filter: (i43.f1 = 0)
-> Seq Scan on public.int4_tbl i41
Output: i41.f1
-> Hash
Output: i42.f1
-> Seq Scan on public.int4_tbl i42
Output: i42.f1
-> Limit
Output: (i41.f1), (i8.q1), (i8.q2), (i42.f1), (i43.f1), ((42))
-> Seq Scan on public.text_tbl
Output: i41.f1, i8.q1, i8.q2, i42.f1, i43.f1, (42)
(25 rows)
select ss2.* from
int4_tbl i41
left join int8_tbl i8
join (select i42.f1 as c1, i43.f1 as c2, 42 as c3
from int4_tbl i42, int4_tbl i43) ss1
on i8.q1 = ss1.c2
on i41.f1 = ss1.c1,
lateral (select i41.*, i8.*, ss1.* from text_tbl limit 1) ss2
where ss1.c2 = 0;
f1 | q1 | q2 | c1 | c2 | c3
----+----+----+----+----+----
(0 rows)
--
-- test ability to push constants through outer join clauses
--
explain (costs off)
select * from int4_tbl a left join tenk1 b on f1 = unique2 where f1 = 0;
QUERY PLAN
-------------------------------------------------
Nested Loop Left Join
Join Filter: (a.f1 = b.unique2)
-> Seq Scan on int4_tbl a
Filter: (f1 = 0)
-> Index Scan using tenk1_unique2 on tenk1 b
Index Cond: (unique2 = 0)
(6 rows)
explain (costs off)
select * from tenk1 a full join tenk1 b using(unique2) where unique2 = 42;
QUERY PLAN
-------------------------------------------------
Merge Full Join
Merge Cond: (a.unique2 = b.unique2)
-> Index Scan using tenk1_unique2 on tenk1 a
Index Cond: (unique2 = 42)
-> Index Scan using tenk1_unique2 on tenk1 b
Index Cond: (unique2 = 42)
(6 rows)
--
-- test that quals attached to an outer join have correct semantics,
-- specifically that they don't re-use expressions computed below the join;
-- we force a mergejoin so that coalesce(b.q1, 1) appears as a join input
--
set enable_hashjoin to off;
set enable_nestloop to off;
explain (verbose, costs off)
select a.q2, b.q1
from int8_tbl a left join int8_tbl b on a.q2 = coalesce(b.q1, 1)
where coalesce(b.q1, 1) > 0;
QUERY PLAN
---------------------------------------------------------
Merge Left Join
Output: a.q2, b.q1
Merge Cond: (a.q2 = (COALESCE(b.q1, '1'::bigint)))
Filter: (COALESCE(b.q1, '1'::bigint) > 0)
-> Sort
Output: a.q2
Sort Key: a.q2
-> Seq Scan on public.int8_tbl a
Output: a.q2
-> Sort
Output: b.q1, (COALESCE(b.q1, '1'::bigint))
Sort Key: (COALESCE(b.q1, '1'::bigint))
-> Seq Scan on public.int8_tbl b
Output: b.q1, COALESCE(b.q1, '1'::bigint)
(14 rows)
select a.q2, b.q1
from int8_tbl a left join int8_tbl b on a.q2 = coalesce(b.q1, 1)
where coalesce(b.q1, 1) > 0;
q2 | q1
-------------------+------------------
-4567890123456789 |
123 | 123
123 | 123
456 |
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
(10 rows)
reset enable_hashjoin;
reset enable_nestloop;
--
-- test join removal
--
begin;
CREATE TEMP TABLE a (id int PRIMARY KEY, b_id int);
CREATE TEMP TABLE b (id int PRIMARY KEY, c_id int);
CREATE TEMP TABLE c (id int PRIMARY KEY);
CREATE TEMP TABLE d (a int, b int);
INSERT INTO a VALUES (0, 0), (1, NULL);
INSERT INTO b VALUES (0, 0), (1, NULL);
INSERT INTO c VALUES (0), (1);
INSERT INTO d VALUES (1,3), (2,2), (3,1);
-- all three cases should be optimizable into a simple seqscan
explain (costs off) SELECT a.* FROM a LEFT JOIN b ON a.b_id = b.id;
QUERY PLAN
---------------
Seq Scan on a
(1 row)
explain (costs off) SELECT b.* FROM b LEFT JOIN c ON b.c_id = c.id;
QUERY PLAN
---------------
Seq Scan on b
(1 row)
explain (costs off)
SELECT a.* FROM a LEFT JOIN (b left join c on b.c_id = c.id)
ON (a.b_id = b.id);
QUERY PLAN
---------------
Seq Scan on a
(1 row)
-- check optimization of outer join within another special join
explain (costs off)
select id from a where id in (
select b.id from b left join c on b.id = c.id
);
QUERY PLAN
----------------------------
Hash Semi Join
Hash Cond: (a.id = b.id)
-> Seq Scan on a
-> Hash
-> Seq Scan on b
(5 rows)
-- check that join removal works for a left join when joining a subquery
-- that is guaranteed to be unique by its GROUP BY clause
explain (costs off)
select d.* from d left join (select * from b group by b.id, b.c_id) s
on d.a = s.id and d.b = s.c_id;
QUERY PLAN
---------------
Seq Scan on d
(1 row)
-- similarly, but keying off a DISTINCT clause
explain (costs off)
select d.* from d left join (select distinct * from b) s
on d.a = s.id and d.b = s.c_id;
QUERY PLAN
---------------
Seq Scan on d
(1 row)
-- join removal is not possible when the GROUP BY contains a column that is
-- not in the join condition. (Note: as of 9.6, we notice that b.id is a
-- primary key and so drop b.c_id from the GROUP BY of the resulting plan;
-- but this happens too late for join removal in the outer plan level.)
explain (costs off)
select d.* from d left join (select * from b group by b.id, b.c_id) s
on d.a = s.id;
QUERY PLAN
------------------------------------------
Merge Right Join
Merge Cond: (b.id = d.a)
-> Group
Group Key: b.id
-> Index Scan using b_pkey on b
-> Sort
Sort Key: d.a
-> Seq Scan on d
(8 rows)
-- similarly, but keying off a DISTINCT clause
explain (costs off)
select d.* from d left join (select distinct * from b) s
on d.a = s.id;
QUERY PLAN
--------------------------------------
Merge Right Join
Merge Cond: (b.id = d.a)
-> Unique
-> Sort
Sort Key: b.id, b.c_id
-> Seq Scan on b
-> Sort
Sort Key: d.a
-> Seq Scan on d
(9 rows)
-- check join removal works when uniqueness of the join condition is enforced
-- by a UNION
explain (costs off)
select d.* from d left join (select id from a union select id from b) s
on d.a = s.id;
QUERY PLAN
---------------
Seq Scan on d
(1 row)
-- check join removal with a cross-type comparison operator
explain (costs off)
select i8.* from int8_tbl i8 left join (select f1 from int4_tbl group by f1) i4
on i8.q1 = i4.f1;
QUERY PLAN
-------------------------
Seq Scan on int8_tbl i8
(1 row)
rollback;
create temp table parent (k int primary key, pd int);
create temp table child (k int unique, cd int);
insert into parent values (1, 10), (2, 20), (3, 30);
insert into child values (1, 100), (4, 400);
-- this case is optimizable
select p.* from parent p left join child c on (p.k = c.k);
k | pd
---+----
1 | 10
2 | 20
3 | 30
(3 rows)
explain (costs off)
select p.* from parent p left join child c on (p.k = c.k);
QUERY PLAN
----------------------
Seq Scan on parent p
(1 row)
-- this case is not
select p.*, linked from parent p
left join (select c.*, true as linked from child c) as ss
on (p.k = ss.k);
k | pd | linked
---+----+--------
1 | 10 | t
2 | 20 |
3 | 30 |
(3 rows)
explain (costs off)
select p.*, linked from parent p
left join (select c.*, true as linked from child c) as ss
on (p.k = ss.k);
QUERY PLAN
---------------------------------
Hash Left Join
Hash Cond: (p.k = c.k)
-> Seq Scan on parent p
-> Hash
-> Seq Scan on child c
(5 rows)
-- check for a 9.0rc1 bug: join removal breaks pseudoconstant qual handling
select p.* from
parent p left join child c on (p.k = c.k)
where p.k = 1 and p.k = 2;
k | pd
---+----
(0 rows)
explain (costs off)
select p.* from
parent p left join child c on (p.k = c.k)
where p.k = 1 and p.k = 2;
QUERY PLAN
------------------------------------------------
Result
One-Time Filter: false
-> Index Scan using parent_pkey on parent p
Index Cond: (k = 1)
(4 rows)
select p.* from
(parent p left join child c on (p.k = c.k)) join parent x on p.k = x.k
where p.k = 1 and p.k = 2;
k | pd
---+----
(0 rows)
explain (costs off)
select p.* from
(parent p left join child c on (p.k = c.k)) join parent x on p.k = x.k
where p.k = 1 and p.k = 2;
QUERY PLAN
--------------------------
Result
One-Time Filter: false
(2 rows)
-- bug 5255: this is not optimizable by join removal
begin;
CREATE TEMP TABLE a (id int PRIMARY KEY);
CREATE TEMP TABLE b (id int PRIMARY KEY, a_id int);
INSERT INTO a VALUES (0), (1);
INSERT INTO b VALUES (0, 0), (1, NULL);
SELECT * FROM b LEFT JOIN a ON (b.a_id = a.id) WHERE (a.id IS NULL OR a.id > 0);
id | a_id | id
----+------+----
1 | |
(1 row)
SELECT b.* FROM b LEFT JOIN a ON (b.a_id = a.id) WHERE (a.id IS NULL OR a.id > 0);
id | a_id
----+------
1 |
(1 row)
rollback;
-- another join removal bug: this is not optimizable, either
begin;
create temp table innertab (id int8 primary key, dat1 int8);
insert into innertab values(123, 42);
SELECT * FROM
(SELECT 1 AS x) ss1
LEFT JOIN
(SELECT q1, q2, COALESCE(dat1, q1) AS y
FROM int8_tbl LEFT JOIN innertab ON q2 = id) ss2
ON true;
x | q1 | q2 | y
---+------------------+-------------------+------------------
1 | 123 | 456 | 123
1 | 123 | 4567890123456789 | 123
1 | 4567890123456789 | 123 | 42
1 | 4567890123456789 | 4567890123456789 | 4567890123456789
1 | 4567890123456789 | -4567890123456789 | 4567890123456789
(5 rows)
rollback;
-- another join removal bug: we must clean up correctly when removing a PHV
begin;
create temp table uniquetbl (f1 text unique);
explain (costs off)
select t1.* from
uniquetbl as t1
left join (select *, '***'::text as d1 from uniquetbl) t2
on t1.f1 = t2.f1
left join uniquetbl t3
on t2.d1 = t3.f1;
QUERY PLAN
--------------------------
Seq Scan on uniquetbl t1
(1 row)
explain (costs off)
select t0.*
from
text_tbl t0
left join
(select case t1.ten when 0 then 'doh!'::text else null::text end as case1,
t1.stringu2
from tenk1 t1
join int4_tbl i4 ON i4.f1 = t1.unique2
left join uniquetbl u1 ON u1.f1 = t1.string4) ss
on t0.f1 = ss.case1
where ss.stringu2 !~* ss.case1;
QUERY PLAN
--------------------------------------------------------------------------------------------
Nested Loop
Join Filter: (CASE t1.ten WHEN 0 THEN 'doh!'::text ELSE NULL::text END = t0.f1)
-> Nested Loop
-> Seq Scan on int4_tbl i4
-> Index Scan using tenk1_unique2 on tenk1 t1
Index Cond: (unique2 = i4.f1)
Filter: (stringu2 !~* CASE ten WHEN 0 THEN 'doh!'::text ELSE NULL::text END)
-> Materialize
-> Seq Scan on text_tbl t0
(9 rows)
select t0.*
from
text_tbl t0
left join
(select case t1.ten when 0 then 'doh!'::text else null::text end as case1,
t1.stringu2
from tenk1 t1
join int4_tbl i4 ON i4.f1 = t1.unique2
left join uniquetbl u1 ON u1.f1 = t1.string4) ss
on t0.f1 = ss.case1
where ss.stringu2 !~* ss.case1;
f1
------
doh!
(1 row)
rollback;
-- bug #8444: we've historically allowed duplicate aliases within aliased JOINs
select * from
int8_tbl x join (int4_tbl x cross join int4_tbl y) j on q1 = f1; -- error
ERROR: column reference "f1" is ambiguous
LINE 2: ..._tbl x join (int4_tbl x cross join int4_tbl y) j on q1 = f1;
^
select * from
int8_tbl x join (int4_tbl x cross join int4_tbl y) j on q1 = y.f1; -- error
ERROR: invalid reference to FROM-clause entry for table "y"
LINE 2: ...bl x join (int4_tbl x cross join int4_tbl y) j on q1 = y.f1;
^
HINT: There is an entry for table "y", but it cannot be referenced from this part of the query.
select * from
int8_tbl x join (int4_tbl x cross join int4_tbl y(ff)) j on q1 = f1; -- ok
q1 | q2 | f1 | ff
----+----+----+----
(0 rows)
--
-- Test hints given on incorrect column references are useful
--
select t1.uunique1 from
tenk1 t1 join tenk2 t2 on t1.two = t2.two; -- error, prefer "t1" suggestipn
ERROR: column t1.uunique1 does not exist
LINE 1: select t1.uunique1 from
^
HINT: Perhaps you meant to reference the column "t1.unique1".
select t2.uunique1 from
tenk1 t1 join tenk2 t2 on t1.two = t2.two; -- error, prefer "t2" suggestion
ERROR: column t2.uunique1 does not exist
LINE 1: select t2.uunique1 from
^
HINT: Perhaps you meant to reference the column "t2.unique1".
select uunique1 from
tenk1 t1 join tenk2 t2 on t1.two = t2.two; -- error, suggest both at once
ERROR: column "uunique1" does not exist
LINE 1: select uunique1 from
^
HINT: Perhaps you meant to reference the column "t1.unique1" or the column "t2.unique1".
--
-- Take care to reference the correct RTE
--
select atts.relid::regclass, s.* from pg_stats s join
pg_attribute a on s.attname = a.attname and s.tablename =
a.attrelid::regclass::text join (select unnest(indkey) attnum,
indexrelid from pg_index i) atts on atts.attnum = a.attnum where
schemaname != 'pg_catalog';
ERROR: column atts.relid does not exist
LINE 1: select atts.relid::regclass, s.* from pg_stats s join
^
--
-- Test LATERAL
--
select unique2, x.*
from tenk1 a, lateral (select * from int4_tbl b where f1 = a.unique1) x;
unique2 | f1
---------+----
9998 | 0
(1 row)
explain (costs off)
select unique2, x.*
from tenk1 a, lateral (select * from int4_tbl b where f1 = a.unique1) x;
QUERY PLAN
-------------------------------------------------
Nested Loop
-> Seq Scan on int4_tbl b
-> Index Scan using tenk1_unique1 on tenk1 a
Index Cond: (unique1 = b.f1)
(4 rows)
select unique2, x.*
from int4_tbl x, lateral (select unique2 from tenk1 where f1 = unique1) ss;
unique2 | f1
---------+----
9998 | 0
(1 row)
explain (costs off)
select unique2, x.*
from int4_tbl x, lateral (select unique2 from tenk1 where f1 = unique1) ss;
QUERY PLAN
-----------------------------------------------
Nested Loop
-> Seq Scan on int4_tbl x
-> Index Scan using tenk1_unique1 on tenk1
Index Cond: (unique1 = x.f1)
(4 rows)
explain (costs off)
select unique2, x.*
from int4_tbl x cross join lateral (select unique2 from tenk1 where f1 = unique1) ss;
QUERY PLAN
-----------------------------------------------
Nested Loop
-> Seq Scan on int4_tbl x
-> Index Scan using tenk1_unique1 on tenk1
Index Cond: (unique1 = x.f1)
(4 rows)
select unique2, x.*
from int4_tbl x left join lateral (select unique1, unique2 from tenk1 where f1 = unique1) ss on true;
unique2 | f1
---------+-------------
9998 | 0
| 123456
| -123456
| 2147483647
| -2147483647
(5 rows)
explain (costs off)
select unique2, x.*
from int4_tbl x left join lateral (select unique1, unique2 from tenk1 where f1 = unique1) ss on true;
QUERY PLAN
-----------------------------------------------
Nested Loop Left Join
-> Seq Scan on int4_tbl x
-> Index Scan using tenk1_unique1 on tenk1
Index Cond: (x.f1 = unique1)
(4 rows)
-- check scoping of lateral versus parent references
-- the first of these should return int8_tbl.q2, the second int8_tbl.q1
select *, (select r from (select q1 as q2) x, (select q2 as r) y) from int8_tbl;
q1 | q2 | r
------------------+-------------------+-------------------
123 | 456 | 456
123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | -4567890123456789
(5 rows)
select *, (select r from (select q1 as q2) x, lateral (select q2 as r) y) from int8_tbl;
q1 | q2 | r
------------------+-------------------+------------------
123 | 456 | 123
123 | 4567890123456789 | 123
4567890123456789 | 123 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789
(5 rows)
-- lateral with function in FROM
select count(*) from tenk1 a, lateral generate_series(1,two) g;
count
-------
5000
(1 row)
explain (costs off)
select count(*) from tenk1 a, lateral generate_series(1,two) g;
QUERY PLAN
------------------------------------------------
Aggregate
-> Nested Loop
-> Seq Scan on tenk1 a
-> Function Scan on generate_series g
(4 rows)
explain (costs off)
select count(*) from tenk1 a cross join lateral generate_series(1,two) g;
QUERY PLAN
------------------------------------------------
Aggregate
-> Nested Loop
-> Seq Scan on tenk1 a
-> Function Scan on generate_series g
(4 rows)
-- don't need the explicit LATERAL keyword for functions
explain (costs off)
select count(*) from tenk1 a, generate_series(1,two) g;
QUERY PLAN
------------------------------------------------
Aggregate
-> Nested Loop
-> Seq Scan on tenk1 a
-> Function Scan on generate_series g
(4 rows)
-- lateral with UNION ALL subselect
explain (costs off)
select * from generate_series(100,200) g,
lateral (select * from int8_tbl a where g = q1 union all
select * from int8_tbl b where g = q2) ss;
QUERY PLAN
------------------------------------------
Nested Loop
-> Function Scan on generate_series g
-> Append
-> Seq Scan on int8_tbl a
Filter: (g.g = q1)
-> Seq Scan on int8_tbl b
Filter: (g.g = q2)
(7 rows)
select * from generate_series(100,200) g,
lateral (select * from int8_tbl a where g = q1 union all
select * from int8_tbl b where g = q2) ss;
g | q1 | q2
-----+------------------+------------------
123 | 123 | 456
123 | 123 | 4567890123456789
123 | 4567890123456789 | 123
(3 rows)
-- lateral with VALUES
explain (costs off)
select count(*) from tenk1 a,
tenk1 b join lateral (values(a.unique1)) ss(x) on b.unique2 = ss.x;
QUERY PLAN
------------------------------------------------------------
Aggregate
-> Merge Join
Merge Cond: (a.unique1 = b.unique2)
-> Index Only Scan using tenk1_unique1 on tenk1 a
-> Index Only Scan using tenk1_unique2 on tenk1 b
(5 rows)
select count(*) from tenk1 a,
tenk1 b join lateral (values(a.unique1)) ss(x) on b.unique2 = ss.x;
count
-------
10000
(1 row)
-- lateral with VALUES, no flattening possible
explain (costs off)
select count(*) from tenk1 a,
tenk1 b join lateral (values(a.unique1),(-1)) ss(x) on b.unique2 = ss.x;
QUERY PLAN
------------------------------------------------------------------
Aggregate
-> Hash Join
Hash Cond: ("*VALUES*".column1 = b.unique2)
-> Nested Loop
-> Index Only Scan using tenk1_unique1 on tenk1 a
-> Values Scan on "*VALUES*"
-> Hash
-> Index Only Scan using tenk1_unique2 on tenk1 b
(8 rows)
select count(*) from tenk1 a,
tenk1 b join lateral (values(a.unique1),(-1)) ss(x) on b.unique2 = ss.x;
count
-------
10000
(1 row)
-- lateral injecting a strange outer join condition
explain (costs off)
select * from int8_tbl a,
int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
on x.q2 = ss.z;
QUERY PLAN
------------------------------------------
Nested Loop
-> Seq Scan on int8_tbl a
-> Hash Right Join
Hash Cond: ((a.q1) = x.q2)
-> Seq Scan on int4_tbl y
-> Hash
-> Seq Scan on int8_tbl x
(7 rows)
select * from int8_tbl a,
int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
on x.q2 = ss.z;
q1 | q2 | q1 | q2 | z
------------------+-------------------+------------------+-------------------+------------------
123 | 456 | 4567890123456789 | 123 | 123
123 | 456 | 4567890123456789 | 123 | 123
123 | 456 | 4567890123456789 | 123 | 123
123 | 456 | 4567890123456789 | 123 | 123
123 | 456 | 4567890123456789 | 123 | 123
123 | 456 | 4567890123456789 | 4567890123456789 |
123 | 456 | 123 | 4567890123456789 |
123 | 456 | 123 | 456 |
123 | 456 | 4567890123456789 | -4567890123456789 |
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 |
123 | 4567890123456789 | 123 | 4567890123456789 |
123 | 4567890123456789 | 123 | 456 |
123 | 4567890123456789 | 4567890123456789 | -4567890123456789 |
4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 123 | 4567890123456789 | 123 |
4567890123456789 | 123 | 123 | 456 |
4567890123456789 | 123 | 4567890123456789 | -4567890123456789 |
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 |
4567890123456789 | 4567890123456789 | 123 | 456 |
4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789 |
4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | 4567890123456789 | 123 |
4567890123456789 | -4567890123456789 | 123 | 456 |
4567890123456789 | -4567890123456789 | 4567890123456789 | -4567890123456789 |
(57 rows)
-- lateral reference to a join alias variable
select * from (select f1/2 as x from int4_tbl) ss1 join int4_tbl i4 on x = f1,
lateral (select x) ss2(y);
x | f1 | y
---+----+---
0 | 0 | 0
(1 row)
select * from (select f1 as x from int4_tbl) ss1 join int4_tbl i4 on x = f1,
lateral (values(x)) ss2(y);
x | f1 | y
-------------+-------------+-------------
0 | 0 | 0
123456 | 123456 | 123456
-123456 | -123456 | -123456
2147483647 | 2147483647 | 2147483647
-2147483647 | -2147483647 | -2147483647
(5 rows)
select * from ((select f1/2 as x from int4_tbl) ss1 join int4_tbl i4 on x = f1) j,
lateral (select x) ss2(y);
x | f1 | y
---+----+---
0 | 0 | 0
(1 row)
-- lateral references requiring pullup
select * from (values(1)) x(lb),
lateral generate_series(lb,4) x4;
lb | x4
----+----
1 | 1
1 | 2
1 | 3
1 | 4
(4 rows)
select * from (select f1/1000000000 from int4_tbl) x(lb),
lateral generate_series(lb,4) x4;
lb | x4
----+----
0 | 0
0 | 1
0 | 2
0 | 3
0 | 4
0 | 0
0 | 1
0 | 2
0 | 3
0 | 4
0 | 0
0 | 1
0 | 2
0 | 3
0 | 4
2 | 2
2 | 3
2 | 4
-2 | -2
-2 | -1
-2 | 0
-2 | 1
-2 | 2
-2 | 3
-2 | 4
(25 rows)
select * from (values(1)) x(lb),
lateral (values(lb)) y(lbcopy);
lb | lbcopy
----+--------
1 | 1
(1 row)
select * from (values(1)) x(lb),
lateral (select lb from int4_tbl) y(lbcopy);
lb | lbcopy
----+--------
1 | 1
1 | 1
1 | 1
1 | 1
1 | 1
(5 rows)
select * from
int8_tbl x left join (select q1,coalesce(q2,0) q2 from int8_tbl) y on x.q2 = y.q1,
lateral (values(x.q1,y.q1,y.q2)) v(xq1,yq1,yq2);
q1 | q2 | q1 | q2 | xq1 | yq1 | yq2
------------------+-------------------+------------------+-------------------+------------------+------------------+-------------------
123 | 456 | | | 123 | |
123 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | -4567890123456789
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
4567890123456789 | 123 | 123 | 456 | 4567890123456789 | 123 | 456
4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 123
4567890123456789 | -4567890123456789 | | | 4567890123456789 | |
(10 rows)
select * from
int8_tbl x left join (select q1,coalesce(q2,0) q2 from int8_tbl) y on x.q2 = y.q1,
lateral (select x.q1,y.q1,y.q2) v(xq1,yq1,yq2);
q1 | q2 | q1 | q2 | xq1 | yq1 | yq2
------------------+-------------------+------------------+-------------------+------------------+------------------+-------------------
123 | 456 | | | 123 | |
123 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 123 | 4567890123456789 | -4567890123456789
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
4567890123456789 | 123 | 123 | 456 | 4567890123456789 | 123 | 456
4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789 | 123
4567890123456789 | -4567890123456789 | | | 4567890123456789 | |
(10 rows)
select x.* from
int8_tbl x left join (select q1,coalesce(q2,0) q2 from int8_tbl) y on x.q2 = y.q1,
lateral (select x.q1,y.q1,y.q2) v(xq1,yq1,yq2);
q1 | q2
------------------+-------------------
123 | 456
123 | 4567890123456789
123 | 4567890123456789
123 | 4567890123456789
4567890123456789 | 123
4567890123456789 | 123
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789
(10 rows)
select v.* from
(int8_tbl x left join (select q1,coalesce(q2,0) q2 from int8_tbl) y on x.q2 = y.q1)
left join int4_tbl z on z.f1 = x.q2,
lateral (select x.q1,y.q1 union all select x.q2,y.q2) v(vx,vy);
vx | vy
-------------------+-------------------
123 |
456 |
123 | 4567890123456789
4567890123456789 | -4567890123456789
123 | 4567890123456789
4567890123456789 | 4567890123456789
123 | 4567890123456789
4567890123456789 | 123
4567890123456789 | 123
123 | 4567890123456789
4567890123456789 | 123
123 | 456
4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 123
4567890123456789 |
-4567890123456789 |
(20 rows)
select v.* from
(int8_tbl x left join (select q1,(select coalesce(q2,0)) q2 from int8_tbl) y on x.q2 = y.q1)
left join int4_tbl z on z.f1 = x.q2,
lateral (select x.q1,y.q1 union all select x.q2,y.q2) v(vx,vy);
vx | vy
-------------------+-------------------
4567890123456789 | 123
123 | 456
4567890123456789 | 123
123 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 123
123 | 4567890123456789
4567890123456789 | 123
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
123 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789
123 | 4567890123456789
4567890123456789 | -4567890123456789
123 |
456 |
4567890123456789 |
-4567890123456789 |
(20 rows)
create temp table dual();
insert into dual default values;
analyze dual;
select v.* from
(int8_tbl x left join (select q1,(select coalesce(q2,0)) q2 from int8_tbl) y on x.q2 = y.q1)
left join int4_tbl z on z.f1 = x.q2,
lateral (select x.q1,y.q1 from dual union all select x.q2,y.q2 from dual) v(vx,vy);
vx | vy
-------------------+-------------------
4567890123456789 | 123
123 | 456
4567890123456789 | 123
123 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 123
123 | 4567890123456789
4567890123456789 | 123
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
123 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789
123 | 4567890123456789
4567890123456789 | -4567890123456789
123 |
456 |
4567890123456789 |
-4567890123456789 |
(20 rows)
explain (verbose, costs off)
select * from
int8_tbl a left join
lateral (select *, a.q2 as x from int8_tbl b) ss on a.q2 = ss.q1;
QUERY PLAN
------------------------------------------
Nested Loop Left Join
Output: a.q1, a.q2, b.q1, b.q2, (a.q2)
-> Seq Scan on public.int8_tbl a
Output: a.q1, a.q2
-> Seq Scan on public.int8_tbl b
Output: b.q1, b.q2, a.q2
Filter: (a.q2 = b.q1)
(7 rows)
select * from
int8_tbl a left join
lateral (select *, a.q2 as x from int8_tbl b) ss on a.q2 = ss.q1;
q1 | q2 | q1 | q2 | x
------------------+-------------------+------------------+-------------------+------------------
123 | 456 | | |
123 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 456 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | | |
(10 rows)
explain (verbose, costs off)
select * from
int8_tbl a left join
lateral (select *, coalesce(a.q2, 42) as x from int8_tbl b) ss on a.q2 = ss.q1;
QUERY PLAN
------------------------------------------------------------------
Nested Loop Left Join
Output: a.q1, a.q2, b.q1, b.q2, (COALESCE(a.q2, '42'::bigint))
-> Seq Scan on public.int8_tbl a
Output: a.q1, a.q2
-> Seq Scan on public.int8_tbl b
Output: b.q1, b.q2, COALESCE(a.q2, '42'::bigint)
Filter: (a.q2 = b.q1)
(7 rows)
select * from
int8_tbl a left join
lateral (select *, coalesce(a.q2, 42) as x from int8_tbl b) ss on a.q2 = ss.q1;
q1 | q2 | q1 | q2 | x
------------------+-------------------+------------------+-------------------+------------------
123 | 456 | | |
123 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
123 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789
4567890123456789 | 123 | 123 | 456 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | -4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | | |
(10 rows)
-- lateral can result in join conditions appearing below their
-- real semantic level
explain (verbose, costs off)
select * from int4_tbl i left join
lateral (select * from int2_tbl j where i.f1 = j.f1) k on true;
QUERY PLAN
-------------------------------------------
Hash Left Join
Output: i.f1, j.f1
Hash Cond: (i.f1 = j.f1)
-> Seq Scan on public.int4_tbl i
Output: i.f1
-> Hash
Output: j.f1
-> Seq Scan on public.int2_tbl j
Output: j.f1
(9 rows)
select * from int4_tbl i left join
lateral (select * from int2_tbl j where i.f1 = j.f1) k on true;
f1 | f1
-------------+----
0 | 0
123456 |
-123456 |
2147483647 |
-2147483647 |
(5 rows)
explain (verbose, costs off)
select * from int4_tbl i left join
lateral (select coalesce(i) from int2_tbl j where i.f1 = j.f1) k on true;
QUERY PLAN
-------------------------------------
Nested Loop Left Join
Output: i.f1, (COALESCE(i.*))
-> Seq Scan on public.int4_tbl i
Output: i.f1, i.*
-> Seq Scan on public.int2_tbl j
Output: j.f1, COALESCE(i.*)
Filter: (i.f1 = j.f1)
(7 rows)
select * from int4_tbl i left join
lateral (select coalesce(i) from int2_tbl j where i.f1 = j.f1) k on true;
f1 | coalesce
-------------+----------
0 | (0)
123456 |
-123456 |
2147483647 |
-2147483647 |
(5 rows)
explain (verbose, costs off)
select * from int4_tbl a,
lateral (
select * from int4_tbl b left join int8_tbl c on (b.f1 = q1 and a.f1 = q2)
) ss;
QUERY PLAN
-------------------------------------------------
Nested Loop
Output: a.f1, b.f1, c.q1, c.q2
-> Seq Scan on public.int4_tbl a
Output: a.f1
-> Hash Left Join
Output: b.f1, c.q1, c.q2
Hash Cond: (b.f1 = c.q1)
-> Seq Scan on public.int4_tbl b
Output: b.f1
-> Hash
Output: c.q1, c.q2
-> Seq Scan on public.int8_tbl c
Output: c.q1, c.q2
Filter: (a.f1 = c.q2)
(14 rows)
select * from int4_tbl a,
lateral (
select * from int4_tbl b left join int8_tbl c on (b.f1 = q1 and a.f1 = q2)
) ss;
f1 | f1 | q1 | q2
-------------+-------------+----+----
0 | 0 | |
0 | 123456 | |
0 | -123456 | |
0 | 2147483647 | |
0 | -2147483647 | |
123456 | 0 | |
123456 | 123456 | |
123456 | -123456 | |
123456 | 2147483647 | |
123456 | -2147483647 | |
-123456 | 0 | |
-123456 | 123456 | |
-123456 | -123456 | |
-123456 | 2147483647 | |
-123456 | -2147483647 | |
2147483647 | 0 | |
2147483647 | 123456 | |
2147483647 | -123456 | |
2147483647 | 2147483647 | |
2147483647 | -2147483647 | |
-2147483647 | 0 | |
-2147483647 | 123456 | |
-2147483647 | -123456 | |
-2147483647 | 2147483647 | |
-2147483647 | -2147483647 | |
(25 rows)
-- lateral reference in a PlaceHolderVar evaluated at join level
explain (verbose, costs off)
select * from
int8_tbl a left join lateral
(select b.q1 as bq1, c.q1 as cq1, least(a.q1,b.q1,c.q1) from
int8_tbl b cross join int8_tbl c) ss
on a.q2 = ss.bq1;
QUERY PLAN
-------------------------------------------------------------
Nested Loop Left Join
Output: a.q1, a.q2, b.q1, c.q1, (LEAST(a.q1, b.q1, c.q1))
-> Seq Scan on public.int8_tbl a
Output: a.q1, a.q2
-> Nested Loop
Output: b.q1, c.q1, LEAST(a.q1, b.q1, c.q1)
-> Seq Scan on public.int8_tbl b
Output: b.q1, b.q2
Filter: (a.q2 = b.q1)
-> Seq Scan on public.int8_tbl c
Output: c.q1, c.q2
(11 rows)
select * from
int8_tbl a left join lateral
(select b.q1 as bq1, c.q1 as cq1, least(a.q1,b.q1,c.q1) from
int8_tbl b cross join int8_tbl c) ss
on a.q2 = ss.bq1;
q1 | q2 | bq1 | cq1 | least
------------------+-------------------+------------------+------------------+------------------
123 | 456 | | |
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 123 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
123 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 123 | 123
4567890123456789 | 123 | 123 | 123 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 123 | 123
4567890123456789 | 123 | 123 | 123 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 123 | 123 | 4567890123456789 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 123 | 123
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
4567890123456789 | -4567890123456789 | | |
(42 rows)
-- case requiring nested PlaceHolderVars
explain (verbose, costs off)
select * from
int8_tbl c left join (
int8_tbl a left join (select q1, coalesce(q2,42) as x from int8_tbl b) ss1
on a.q2 = ss1.q1
cross join
lateral (select q1, coalesce(ss1.x,q2) as y from int8_tbl d) ss2
) on c.q2 = ss2.q1,
lateral (select ss2.y offset 0) ss3;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nested Loop
Output: c.q1, c.q2, a.q1, a.q2, b.q1, (COALESCE(b.q2, '42'::bigint)), d.q1, (COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2)), ((COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2)))
-> Hash Right Join
Output: c.q1, c.q2, a.q1, a.q2, b.q1, d.q1, (COALESCE(b.q2, '42'::bigint)), (COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2))
Hash Cond: (d.q1 = c.q2)
-> Nested Loop
Output: a.q1, a.q2, b.q1, d.q1, (COALESCE(b.q2, '42'::bigint)), (COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2))
-> Hash Left Join
Output: a.q1, a.q2, b.q1, (COALESCE(b.q2, '42'::bigint))
Hash Cond: (a.q2 = b.q1)
-> Seq Scan on public.int8_tbl a
Output: a.q1, a.q2
-> Hash
Output: b.q1, (COALESCE(b.q2, '42'::bigint))
-> Seq Scan on public.int8_tbl b
Output: b.q1, COALESCE(b.q2, '42'::bigint)
-> Seq Scan on public.int8_tbl d
Output: d.q1, COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2)
-> Hash
Output: c.q1, c.q2
-> Seq Scan on public.int8_tbl c
Output: c.q1, c.q2
-> Result
Output: (COALESCE((COALESCE(b.q2, '42'::bigint)), d.q2))
(24 rows)
-- case that breaks the old ph_may_need optimization
explain (verbose, costs off)
select c.*,a.*,ss1.q1,ss2.q1,ss3.* from
int8_tbl c left join (
int8_tbl a left join
(select q1, coalesce(q2,f1) as x from int8_tbl b, int4_tbl b2
where q1 < f1) ss1
on a.q2 = ss1.q1
cross join
lateral (select q1, coalesce(ss1.x,q2) as y from int8_tbl d) ss2
) on c.q2 = ss2.q1,
lateral (select * from int4_tbl i where ss2.y > f1) ss3;
QUERY PLAN
---------------------------------------------------------------------------------------------------------
Nested Loop
Output: c.q1, c.q2, a.q1, a.q2, b.q1, d.q1, i.f1
Join Filter: ((COALESCE((COALESCE(b.q2, (b2.f1)::bigint)), d.q2)) > i.f1)
-> Hash Right Join
Output: c.q1, c.q2, a.q1, a.q2, b.q1, d.q1, (COALESCE((COALESCE(b.q2, (b2.f1)::bigint)), d.q2))
Hash Cond: (d.q1 = c.q2)
-> Nested Loop
Output: a.q1, a.q2, b.q1, d.q1, (COALESCE((COALESCE(b.q2, (b2.f1)::bigint)), d.q2))
-> Hash Right Join
Output: a.q1, a.q2, b.q1, (COALESCE(b.q2, (b2.f1)::bigint))
Hash Cond: (b.q1 = a.q2)
-> Nested Loop
Output: b.q1, COALESCE(b.q2, (b2.f1)::bigint)
Join Filter: (b.q1 < b2.f1)
-> Seq Scan on public.int8_tbl b
Output: b.q1, b.q2
-> Materialize
Output: b2.f1
-> Seq Scan on public.int4_tbl b2
Output: b2.f1
-> Hash
Output: a.q1, a.q2
-> Seq Scan on public.int8_tbl a
Output: a.q1, a.q2
-> Seq Scan on public.int8_tbl d
Output: d.q1, COALESCE((COALESCE(b.q2, (b2.f1)::bigint)), d.q2)
-> Hash
Output: c.q1, c.q2
-> Seq Scan on public.int8_tbl c
Output: c.q1, c.q2
-> Materialize
Output: i.f1
-> Seq Scan on public.int4_tbl i
Output: i.f1
(34 rows)
-- check processing of postponed quals (bug #9041)
explain (verbose, costs off)
select * from
(select 1 as x offset 0) x cross join (select 2 as y offset 0) y
left join lateral (
select * from (select 3 as z offset 0) z where z.z = x.x
) zz on zz.z = y.y;
QUERY PLAN
----------------------------------------------
Nested Loop Left Join
Output: (1), (2), (3)
Join Filter: (((3) = (1)) AND ((3) = (2)))
-> Nested Loop
Output: (1), (2)
-> Result
Output: 1
-> Result
Output: 2
-> Result
Output: 3
(11 rows)
-- check we don't try to do a unique-ified semijoin with LATERAL
explain (verbose, costs off)
select * from
(values (0,9998), (1,1000)) v(id,x),
lateral (select f1 from int4_tbl
where f1 = any (select unique1 from tenk1
where unique2 = v.x offset 0)) ss;
QUERY PLAN
----------------------------------------------------------------------
Nested Loop
Output: "*VALUES*".column1, "*VALUES*".column2, int4_tbl.f1
-> Values Scan on "*VALUES*"
Output: "*VALUES*".column1, "*VALUES*".column2
-> Nested Loop Semi Join
Output: int4_tbl.f1
Join Filter: (int4_tbl.f1 = tenk1.unique1)
-> Seq Scan on public.int4_tbl
Output: int4_tbl.f1
-> Materialize
Output: tenk1.unique1
-> Index Scan using tenk1_unique2 on public.tenk1
Output: tenk1.unique1
Index Cond: (tenk1.unique2 = "*VALUES*".column2)
(14 rows)
select * from
(values (0,9998), (1,1000)) v(id,x),
lateral (select f1 from int4_tbl
where f1 = any (select unique1 from tenk1
where unique2 = v.x offset 0)) ss;
id | x | f1
----+------+----
0 | 9998 | 0
(1 row)
-- check proper extParam/allParam handling (this isn't exactly a LATERAL issue,
-- but we can make the test case much more compact with LATERAL)
explain (verbose, costs off)
select * from (values (0), (1)) v(id),
lateral (select * from int8_tbl t1,
lateral (select * from
(select * from int8_tbl t2
where q1 = any (select q2 from int8_tbl t3
where q2 = (select greatest(t1.q1,t2.q2))
and (select v.id=0)) offset 0) ss2) ss
where t1.q1 = ss.q2) ss0;
QUERY PLAN
-----------------------------------------------------------------
Nested Loop
Output: "*VALUES*".column1, t1.q1, t1.q2, ss2.q1, ss2.q2
-> Seq Scan on public.int8_tbl t1
Output: t1.q1, t1.q2
-> Nested Loop
Output: "*VALUES*".column1, ss2.q1, ss2.q2
-> Values Scan on "*VALUES*"
Output: "*VALUES*".column1
-> Subquery Scan on ss2
Output: ss2.q1, ss2.q2
Filter: (t1.q1 = ss2.q2)
-> Seq Scan on public.int8_tbl t2
Output: t2.q1, t2.q2
Filter: (SubPlan 3)
SubPlan 3
-> Result
Output: t3.q2
One-Time Filter: $4
InitPlan 1 (returns $2)
-> Result
Output: GREATEST($0, t2.q2)
InitPlan 2 (returns $4)
-> Result
Output: ($3 = 0)
-> Seq Scan on public.int8_tbl t3
Output: t3.q1, t3.q2
Filter: (t3.q2 = $2)
(27 rows)
select * from (values (0), (1)) v(id),
lateral (select * from int8_tbl t1,
lateral (select * from
(select * from int8_tbl t2
where q1 = any (select q2 from int8_tbl t3
where q2 = (select greatest(t1.q1,t2.q2))
and (select v.id=0)) offset 0) ss2) ss
where t1.q1 = ss.q2) ss0;
id | q1 | q2 | q1 | q2
----+------------------+-------------------+------------------+------------------
0 | 4567890123456789 | 123 | 4567890123456789 | 4567890123456789
0 | 4567890123456789 | 4567890123456789 | 4567890123456789 | 4567890123456789
0 | 4567890123456789 | -4567890123456789 | 4567890123456789 | 4567890123456789
(3 rows)
-- test some error cases where LATERAL should have been used but wasn't
select f1,g from int4_tbl a, (select f1 as g) ss;
ERROR: column "f1" does not exist
LINE 1: select f1,g from int4_tbl a, (select f1 as g) ss;
^
HINT: There is a column named "f1" in table "a", but it cannot be referenced from this part of the query.
select f1,g from int4_tbl a, (select a.f1 as g) ss;
ERROR: invalid reference to FROM-clause entry for table "a"
LINE 1: select f1,g from int4_tbl a, (select a.f1 as g) ss;
^
HINT: There is an entry for table "a", but it cannot be referenced from this part of the query.
select f1,g from int4_tbl a cross join (select f1 as g) ss;
ERROR: column "f1" does not exist
LINE 1: select f1,g from int4_tbl a cross join (select f1 as g) ss;
^
HINT: There is a column named "f1" in table "a", but it cannot be referenced from this part of the query.
select f1,g from int4_tbl a cross join (select a.f1 as g) ss;
ERROR: invalid reference to FROM-clause entry for table "a"
LINE 1: select f1,g from int4_tbl a cross join (select a.f1 as g) ss...
^
HINT: There is an entry for table "a", but it cannot be referenced from this part of the query.
-- SQL:2008 says the left table is in scope but illegal to access here
select f1,g from int4_tbl a right join lateral generate_series(0, a.f1) g on true;
ERROR: invalid reference to FROM-clause entry for table "a"
LINE 1: ... int4_tbl a right join lateral generate_series(0, a.f1) g on...
^
DETAIL: The combining JOIN type must be INNER or LEFT for a LATERAL reference.
select f1,g from int4_tbl a full join lateral generate_series(0, a.f1) g on true;
ERROR: invalid reference to FROM-clause entry for table "a"
LINE 1: ...m int4_tbl a full join lateral generate_series(0, a.f1) g on...
^
DETAIL: The combining JOIN type must be INNER or LEFT for a LATERAL reference.
-- check we complain about ambiguous table references
select * from
int8_tbl x cross join (int4_tbl x cross join lateral (select x.f1) ss);
ERROR: table reference "x" is ambiguous
LINE 2: ...cross join (int4_tbl x cross join lateral (select x.f1) ss);
^
-- LATERAL can be used to put an aggregate into the FROM clause of its query
select 1 from tenk1 a, lateral (select max(a.unique1) from int4_tbl b) ss;
ERROR: aggregate functions are not allowed in FROM clause of their own query level
LINE 1: select 1 from tenk1 a, lateral (select max(a.unique1) from i...
^
-- check behavior of LATERAL in UPDATE/DELETE
create temp table xx1 as select f1 as x1, -f1 as x2 from int4_tbl;
-- error, can't do this:
update xx1 set x2 = f1 from (select * from int4_tbl where f1 = x1) ss;
ERROR: column "x1" does not exist
LINE 1: ... set x2 = f1 from (select * from int4_tbl where f1 = x1) ss;
^
HINT: There is a column named "x1" in table "xx1", but it cannot be referenced from this part of the query.
update xx1 set x2 = f1 from (select * from int4_tbl where f1 = xx1.x1) ss;
ERROR: invalid reference to FROM-clause entry for table "xx1"
LINE 1: ...t x2 = f1 from (select * from int4_tbl where f1 = xx1.x1) ss...
^
HINT: There is an entry for table "xx1", but it cannot be referenced from this part of the query.
-- can't do it even with LATERAL:
update xx1 set x2 = f1 from lateral (select * from int4_tbl where f1 = x1) ss;
ERROR: invalid reference to FROM-clause entry for table "xx1"
LINE 1: ...= f1 from lateral (select * from int4_tbl where f1 = x1) ss;
^
HINT: There is an entry for table "xx1", but it cannot be referenced from this part of the query.
-- we might in future allow something like this, but for now it's an error:
update xx1 set x2 = f1 from xx1, lateral (select * from int4_tbl where f1 = x1) ss;
ERROR: table name "xx1" specified more than once
-- also errors:
delete from xx1 using (select * from int4_tbl where f1 = x1) ss;
ERROR: column "x1" does not exist
LINE 1: ...te from xx1 using (select * from int4_tbl where f1 = x1) ss;
^
HINT: There is a column named "x1" in table "xx1", but it cannot be referenced from this part of the query.
delete from xx1 using (select * from int4_tbl where f1 = xx1.x1) ss;
ERROR: invalid reference to FROM-clause entry for table "xx1"
LINE 1: ...from xx1 using (select * from int4_tbl where f1 = xx1.x1) ss...
^
HINT: There is an entry for table "xx1", but it cannot be referenced from this part of the query.
delete from xx1 using lateral (select * from int4_tbl where f1 = x1) ss;
ERROR: invalid reference to FROM-clause entry for table "xx1"
LINE 1: ...xx1 using lateral (select * from int4_tbl where f1 = x1) ss;
^
HINT: There is an entry for table "xx1", but it cannot be referenced from this part of the query.
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