ydb/yql/essentials/tests/postgresql/original/cases/join.out

--
-- 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);
-- useful in some tests below
create temp table onerow();
insert into onerow default values;
analyze onerow;
--
-- CORRELATION NAMES
-- Make sure that table/column aliases are supported
-- before diving into more complex join syntax.
--
SELECT *
  FROM J1_TBL AS tx;
 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 *
  FROM J1_TBL tx;
 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 *
  FROM J1_TBL AS t1 (a, b, c);
 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 *
  FROM J1_TBL t1 (a, b, c);
 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 *
  FROM J1_TBL t1 (a, b, c), J2_TBL t2 (d, e);
 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 t1.a, t2.e
  FROM J1_TBL t1 (a, b, c), J2_TBL t2 (d, e)
  WHERE t1.a = t2.d;
 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 *
  FROM J1_TBL CROSS JOIN J2_TBL;
 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 i, k, t
  FROM J1_TBL CROSS JOIN J2_TBL;
ERROR:  column reference "i" is ambiguous
LINE 1: SELECT i, k, t
               ^
-- resolve previous ambiguity by specifying the table name
SELECT t1.i, k, t
  FROM J1_TBL t1 CROSS JOIN J2_TBL t2;
 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 ii, tt, kk
  FROM (J1_TBL CROSS JOIN J2_TBL)
    AS tx (ii, jj, tt, ii2, kk);
 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 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);
 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 *
  FROM J1_TBL CROSS JOIN J2_TBL a CROSS JOIN J2_TBL b;
 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 *
  FROM J1_TBL INNER JOIN J2_TBL USING (i);
 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 *
  FROM J1_TBL JOIN J2_TBL USING (i);
 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 *
  FROM J1_TBL t1 (a, b, c) JOIN J2_TBL t2 (a, d) USING (a)
  ORDER BY a, d;
 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 *
  FROM J1_TBL t1 (a, b, c) JOIN J2_TBL t2 (a, b) USING (b)
  ORDER BY b, t1.a;
 b | a |   c   | a 
---+---+-------+---
 0 | 5 | five  |  
 0 |   | zero  |  
 2 | 3 | three | 2
 4 | 1 | one   | 2
(4 rows)

-- test join using aliases
SELECT * FROM J1_TBL JOIN J2_TBL USING (i) WHERE J1_TBL.t = 'one';  -- ok
 i | j |  t  | k  
---+---+-----+----
 1 | 4 | one | -1
(1 row)

SELECT * FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE J1_TBL.t = 'one';  -- ok
 i | j |  t  | k  
---+---+-----+----
 1 | 4 | one | -1
(1 row)

SELECT * FROM (J1_TBL JOIN J2_TBL USING (i)) AS x WHERE J1_TBL.t = 'one';  -- error
ERROR:  invalid reference to FROM-clause entry for table "j1_tbl"
LINE 1: ... * FROM (J1_TBL JOIN J2_TBL USING (i)) AS x WHERE J1_TBL.t =...
                                                             ^
HINT:  There is an entry for table "j1_tbl", but it cannot be referenced from this part of the query.
SELECT * FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE x.i = 1;  -- ok
 i | j |  t  | k  
---+---+-----+----
 1 | 4 | one | -1
(1 row)

SELECT * FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE x.t = 'one';  -- error
ERROR:  column x.t does not exist
LINE 1: ...CT * FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE x.t = 'one...
                                                             ^
SELECT * FROM (J1_TBL JOIN J2_TBL USING (i) AS x) AS xx WHERE x.i = 1;  -- error (XXX could use better hint)
ERROR:  missing FROM-clause entry for table "x"
LINE 1: ...ROM (J1_TBL JOIN J2_TBL USING (i) AS x) AS xx WHERE x.i = 1;
                                                               ^
SELECT * FROM J1_TBL a1 JOIN J2_TBL a2 USING (i) AS a1;  -- error
ERROR:  table name "a1" specified more than once
SELECT x.* FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE J1_TBL.t = 'one';
 i 
---
 1
(1 row)

SELECT ROW(x.*) FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE J1_TBL.t = 'one';
 row 
-----
 (1)
(1 row)

SELECT row_to_json(x.*) FROM J1_TBL JOIN J2_TBL USING (i) AS x WHERE J1_TBL.t = 'one';
 row_to_json 
-------------
 {"i":1}
(1 row)

--
-- NATURAL JOIN
-- Inner equi-join on all columns with the same name
--
SELECT *
  FROM J1_TBL NATURAL JOIN J2_TBL;
 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 *
  FROM J1_TBL t1 (a, b, c) NATURAL JOIN J2_TBL t2 (a, d);
 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 *
  FROM J1_TBL t1 (a, b, c) NATURAL JOIN J2_TBL t2 (d, a);
 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 *
  FROM J1_TBL t1 (a, b) NATURAL JOIN J2_TBL t2 (a);
 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 *
  FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i = J2_TBL.i);
 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 *
  FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i = J2_TBL.k);
 i | j |  t   | i | k 
---+---+------+---+---
 0 |   | zero |   | 0
 2 | 3 | two  | 2 | 2
 4 | 1 | four | 2 | 4
(3 rows)

--
-- Non-equi-joins
--
SELECT *
  FROM J1_TBL JOIN J2_TBL ON (J1_TBL.i <= J2_TBL.k);
 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 *
  FROM J1_TBL LEFT OUTER JOIN J2_TBL USING (i)
  ORDER BY i, k, t;
 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 *
  FROM J1_TBL LEFT JOIN J2_TBL USING (i)
  ORDER BY i, k, t;
 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 *
  FROM J1_TBL RIGHT OUTER JOIN J2_TBL USING (i);
 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 *
  FROM J1_TBL RIGHT JOIN J2_TBL USING (i);
 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 *
  FROM J1_TBL FULL OUTER JOIN J2_TBL USING (i)
  ORDER BY i, k, t;
 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 *
  FROM J1_TBL FULL JOIN J2_TBL USING (i)
  ORDER BY i, k, t;
 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 *
  FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (k = 1);
 i | j | t | k 
---+---+---+---
(0 rows)

SELECT *
  FROM J1_TBL LEFT JOIN J2_TBL USING (i) WHERE (i = 1);
 i | j |  t  | k  
---+---+-----+----
 1 | 4 | one | -1
(1 row)

--
-- semijoin selectivity for <>
--
explain (costs off)
select * from int4_tbl i4, tenk1 a
where exists(select * from tenk1 b
             where a.twothousand = b.twothousand and a.fivethous <> b.fivethous)
      and i4.f1 = a.tenthous;
                  QUERY PLAN                  
----------------------------------------------
 Hash Semi Join
   Hash Cond: (a.twothousand = b.twothousand)
   Join Filter: (a.fivethous <> b.fivethous)
   ->  Hash Join
         Hash Cond: (a.tenthous = i4.f1)
         ->  Seq Scan on tenk1 a
         ->  Hash
               ->  Seq Scan on int4_tbl i4
   ->  Hash
         ->  Seq Scan on tenk1 b
(10 rows)

--
-- 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)

-- Constants as join keys can also be problematic
SELECT * FROM
  (SELECT name, n as s1_n FROM t1) as s1
FULL JOIN
  (SELECT name, 2 as s2_n FROM t2) as s2
ON (s1_n = s2_n);
 name | s1_n | name | s2_n 
------+------+------+------
      |      | bb   |    2
      |      | cc   |    2
      |      | ee   |    2
 bb   |   11 |      |     
(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
               ->  Seq Scan on int8_tbl i2
                     Filter: (q1 = 123)
(8 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)

--
-- regression test: check a case where we formerly missed including an EC
-- enforcement clause because it was expected to be handled at scan level
--
explain (costs off)
select a.f1, b.f1, t.thousand, t.tenthous from
  tenk1 t,
  (select sum(f1)+1 as f1 from int4_tbl i4a) a,
  (select sum(f1) as f1 from int4_tbl i4b) b
where b.f1 = t.thousand and a.f1 = b.f1 and (a.f1+b.f1+999) = t.tenthous;
                                                      QUERY PLAN                                                       
-----------------------------------------------------------------------------------------------------------------------
 Nested Loop
   ->  Aggregate
         ->  Seq Scan on int4_tbl i4b
   ->  Nested Loop
         Join Filter: ((sum(i4b.f1)) = ((sum(i4a.f1) + 1)))
         ->  Aggregate
               ->  Seq Scan on int4_tbl i4a
         ->  Index Only Scan using tenk1_thous_tenthous on tenk1 t
               Index Cond: ((thousand = (sum(i4b.f1))) AND (tenthous = ((((sum(i4a.f1) + 1)) + (sum(i4b.f1))) + 999)))
(9 rows)

select a.f1, b.f1, t.thousand, t.tenthous from
  tenk1 t,
  (select sum(f1)+1 as f1 from int4_tbl i4a) a,
  (select sum(f1) as f1 from int4_tbl i4b) b
where b.f1 = t.thousand and a.f1 = b.f1 and (a.f1+b.f1+999) = t.tenthous;
 f1 | f1 | thousand | tenthous 
----+----+----------+----------
(0 rows)

--
-- check a case where we formerly got confused by conflicting sort orders
-- in redundant merge join path keys
--
explain (costs off)
select * from
  j1_tbl full join
  (select * from j2_tbl order by j2_tbl.i desc, j2_tbl.k asc) j2_tbl
  on j1_tbl.i = j2_tbl.i and j1_tbl.i = j2_tbl.k;
                           QUERY PLAN                            
-----------------------------------------------------------------
 Merge Full Join
   Merge Cond: ((j2_tbl.i = j1_tbl.i) AND (j2_tbl.k = j1_tbl.i))
   ->  Sort
         Sort Key: j2_tbl.i DESC, j2_tbl.k
         ->  Seq Scan on j2_tbl
   ->  Sort
         Sort Key: j1_tbl.i DESC
         ->  Seq Scan on j1_tbl
(8 rows)

select * from
  j1_tbl full join
  (select * from j2_tbl order by j2_tbl.i desc, j2_tbl.k asc) j2_tbl
  on j1_tbl.i = j2_tbl.i and j1_tbl.i = j2_tbl.k;
 i | j |   t   | i | k  
---+---+-------+---+----
   |   |       |   |  0
   |   |       |   |   
   | 0 | zero  |   |   
   |   | null  |   |   
 8 | 8 | eight |   |   
 7 | 7 | seven |   |   
 6 | 6 | six   |   |   
   |   |       | 5 | -5
   |   |       | 5 | -5
 5 | 0 | five  |   |   
 4 | 1 | four  |   |   
   |   |       | 3 | -3
 3 | 2 | three |   |   
 2 | 3 | two   | 2 |  2
   |   |       | 2 |  4
   |   |       | 1 | -1
   |   |       | 0 |   
 1 | 4 | one   |   |   
 0 |   | zero  |   |   
(19 rows)

--
-- a different check for handling of redundant sort keys in merge joins
--
explain (costs off)
select count(*) from
  (select * from tenk1 x order by x.thousand, x.twothousand, x.fivethous) x
  left join
  (select * from tenk1 y order by y.unique2) y
  on x.thousand = y.unique2 and x.twothousand = y.hundred and x.fivethous = y.unique2;
                                    QUERY PLAN                                    
----------------------------------------------------------------------------------
 Aggregate
   ->  Merge Left Join
         Merge Cond: (x.thousand = y.unique2)
         Join Filter: ((x.twothousand = y.hundred) AND (x.fivethous = y.unique2))
         ->  Sort
               Sort Key: x.thousand, x.twothousand, x.fivethous
               ->  Seq Scan on tenk1 x
         ->  Materialize
               ->  Index Scan using tenk1_unique2 on tenk1 y
(9 rows)

select count(*) from
  (select * from tenk1 x order by x.thousand, x.twothousand, x.fivethous) x
  left join
  (select * from tenk1 y order by y.unique2) y
  on x.thousand = y.unique2 and x.twothousand = y.hundred and x.fivethous = y.unique2;
 count 
-------
 10000
(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".
-- Test matching of locking clause with wrong alias
select t1.*, t2.*, unnamed_join.* from
  t1 join t2 on (t1.a = t2.a), t3 as unnamed_join
  for update of unnamed_join;
 a | b | a | b | x | y 
---+---+---+---+---+---
(0 rows)

select foo.*, unnamed_join.* from
  t1 join t2 using (a) as foo, t3 as unnamed_join
  for update of unnamed_join;
 a | x | y 
---+---+---
(0 rows)

select foo.*, unnamed_join.* from
  t1 join t2 using (a) as foo, t3 as unnamed_join
  for update of foo;
ERROR:  FOR UPDATE cannot be applied to a join
LINE 3:   for update of foo;
                        ^
select bar.*, unnamed_join.* from
  (t1 join t2 using (a) as foo) as bar, t3 as unnamed_join
  for update of foo;
ERROR:  relation "foo" in FOR UPDATE clause not found in FROM clause
LINE 3:   for update of foo;
                        ^
select bar.*, unnamed_join.* from
  (t1 join t2 using (a) as foo) as bar, t3 as unnamed_join
  for update of bar;
ERROR:  FOR UPDATE cannot be applied to a join
LINE 3:   for update of bar;
                        ^
--
-- 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;
set enable_memoize 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;
reset enable_memoize;
--
-- 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 handling of merge clauses using record_ops
--
begin;
create type mycomptype as (id int, v bigint);
create temp table tidv (idv mycomptype);
create index on tidv (idv);
explain (costs off)
select a.idv, b.idv from tidv a, tidv b where a.idv = b.idv;
                        QUERY PLAN                        
----------------------------------------------------------
 Merge Join
   Merge Cond: (a.idv = b.idv)
   ->  Index Only Scan using tidv_idv_idx on tidv a
   ->  Materialize
         ->  Index Only Scan using tidv_idv_idx on tidv b
(5 rows)

set enable_mergejoin = 0;
set enable_hashjoin = 0;
explain (costs off)
select a.idv, b.idv from tidv a, tidv b where a.idv = b.idv;
                     QUERY PLAN                     
----------------------------------------------------
 Nested Loop
   ->  Seq Scan on tidv a
   ->  Index Only Scan using tidv_idv_idx on tidv b
         Index Cond: (idv = a.idv)
(4 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)

--
-- variant where a PlaceHolderVar is needed at a join, but not above the join
--
explain (costs off)
select * from
  int4_tbl as i41,
  lateral
    (select 1 as x from
      (select i41.f1 as lat,
              i42.f1 as loc from
         int8_tbl as i81, int4_tbl as i42) as ss1
      right join int4_tbl as i43 on (i43.f1 > 1)
      where ss1.loc = ss1.lat) as ss2
where i41.f1 > 0;
                    QUERY PLAN                    
--------------------------------------------------
 Nested Loop
   ->  Nested Loop
         ->  Seq Scan on int4_tbl i41
               Filter: (f1 > 0)
         ->  Nested Loop
               Join Filter: (i41.f1 = i42.f1)
               ->  Seq Scan on int8_tbl i81
               ->  Materialize
                     ->  Seq Scan on int4_tbl i42
   ->  Materialize
         ->  Seq Scan on int4_tbl i43
               Filter: (f1 > 1)
(12 rows)

select * from
  int4_tbl as i41,
  lateral
    (select 1 as x from
      (select i41.f1 as lat,
              i42.f1 as loc from
         int8_tbl as i81, int4_tbl as i42) as ss1
      right join int4_tbl as i43 on (i43.f1 > 1)
      where ss1.loc = ss1.lat) as ss2
where i41.f1 > 0;
     f1     | x 
------------+---
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
     123456 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
 2147483647 | 1
(20 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
--
create temp table q1 as select 1 as q1;
create temp table q2 as select 0 as q2;
analyze q1;
analyze q2;
explain (costs off)
select * from
  tenk1 join int4_tbl on f1 = twothousand,
  q1, q2
where q1 = thousand or q2 = thousand;
                               QUERY PLAN                               
------------------------------------------------------------------------
 Hash Join
   Hash Cond: (tenk1.twothousand = int4_tbl.f1)
   ->  Nested Loop
         ->  Nested Loop
               ->  Seq Scan on q1
               ->  Seq 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: (thousand = q1.q1)
                     ->  Bitmap Index Scan on tenk1_thous_tenthous
                           Index Cond: (thousand = q2.q2)
   ->  Hash
         ->  Seq Scan on int4_tbl
(15 rows)

explain (costs off)
select * from
  tenk1 join int4_tbl on f1 = twothousand,
  q1, q2
where thousand = (q1 + q2);
                          QUERY PLAN                          
--------------------------------------------------------------
 Hash Join
   Hash Cond: (tenk1.twothousand = int4_tbl.f1)
   ->  Nested Loop
         ->  Nested Loop
               ->  Seq Scan on q1
               ->  Seq 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 (select 1,0 from onerow) v1(x1,x2)
               left join (select 3,1 from onerow) 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
   ->  Nested Loop
         Join Filter: (t1.stringu1 > t2.stringu2)
         ->  Nested Loop
               ->  Nested Loop
                     ->  Seq Scan on onerow
                     ->  Seq Scan on onerow onerow_1
               ->  Index Scan using tenk1_unique2 on tenk1 t1
                     Index Cond: ((unique2 = (11)) AND (unique2 < 42))
         ->  Index Scan using tenk1_unique1 on tenk1 t2
               Index Cond: (unique1 = (3))
   ->  Seq Scan on int4_tbl i1
         Filter: (f1 = 0)
(13 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 (select 1,0 from onerow) v1(x1,x2)
               left join (select 3,1 from onerow) 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)

-- this variant is foldable by the remove-useless-RESULT-RTEs code
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
         ->  Seq Scan on int4_tbl i1
               Filter: (f1 = 0)
         ->  Index Scan using tenk1_unique2 on tenk1 t1
               Index Cond: ((unique2 = (11)) AND (unique2 < 42))
   ->  Index Scan using tenk1_unique1 on tenk1 t2
         Index Cond: (unique1 = (3))
(9 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)

-- Here's a variant that we can't fold too aggressively, though,
-- or we end up with noplace to evaluate the lateral PHV
explain (verbose, costs off)
select * from
  (select 1 as x) ss1 left join (select 2 as y) ss2 on (true),
  lateral (select ss2.y as z limit 1) ss3;
        QUERY PLAN         
---------------------------
 Nested Loop
   Output: 1, (2), ((2))
   ->  Result
         Output: 2
   ->  Limit
         Output: ((2))
         ->  Result
               Output: (2)
(8 rows)

select * from
  (select 1 as x) ss1 left join (select 2 as y) ss2 on (true),
  lateral (select ss2.y as z limit 1) ss3;
 x | y | z 
---+---+---
 1 | 2 | 2
(1 row)

-- Test proper handling of appendrel PHVs during useless-RTE removal
explain (costs off)
select * from
  (select 0 as z) as t1
  left join
  (select true as a) as t2
  on true,
  lateral (select true as b
           union all
           select a as b) as t3
where b;
              QUERY PLAN               
---------------------------------------
 Nested Loop
   ->  Result
   ->  Append
         ->  Result
         ->  Result
               One-Time Filter: (true)
(6 rows)

select * from
  (select 0 as z) as t1
  left join
  (select true as a) as t2
  on true,
  lateral (select true as b
           union all
           select a as b) as t3
where b;
 z | a | b 
---+---+---
 0 | t | t
 0 | t | t
(2 rows)

--
-- test inlining of immutable functions
--
create function f_immutable_int4(i integer) returns integer as
$$ begin return i; end; $$ language plpgsql immutable;
-- check optimization of function scan with join
explain (costs off)
select unique1 from tenk1, (select * from f_immutable_int4(1) x) x
where x = unique1;
                  QUERY PLAN                  
----------------------------------------------
 Index Only Scan using tenk1_unique1 on tenk1
   Index Cond: (unique1 = 1)
(2 rows)

explain (verbose, costs off)
select unique1, x.*
from tenk1, (select *, random() from f_immutable_int4(1) x) x
where x = unique1;
                        QUERY PLAN                         
-----------------------------------------------------------
 Nested Loop
   Output: tenk1.unique1, (1), (random())
   ->  Result
         Output: 1, random()
   ->  Index Only Scan using tenk1_unique1 on public.tenk1
         Output: tenk1.unique1
         Index Cond: (tenk1.unique1 = (1))
(7 rows)

explain (costs off)
select unique1 from tenk1, f_immutable_int4(1) x where x = unique1;
                  QUERY PLAN                  
----------------------------------------------
 Index Only Scan using tenk1_unique1 on tenk1
   Index Cond: (unique1 = 1)
(2 rows)

explain (costs off)
select unique1 from tenk1, lateral f_immutable_int4(1) x where x = unique1;
                  QUERY PLAN                  
----------------------------------------------
 Index Only Scan using tenk1_unique1 on tenk1
   Index Cond: (unique1 = 1)
(2 rows)

explain (costs off)
select unique1 from tenk1, lateral f_immutable_int4(1) x where x in (select 17);
        QUERY PLAN        
--------------------------
 Result
   One-Time Filter: false
(2 rows)

explain (costs off)
select unique1, x from tenk1 join f_immutable_int4(1) x on unique1 = x;
                  QUERY PLAN                  
----------------------------------------------
 Index Only Scan using tenk1_unique1 on tenk1
   Index Cond: (unique1 = 1)
(2 rows)

explain (costs off)
select unique1, x from tenk1 left join f_immutable_int4(1) x on unique1 = x;
                     QUERY PLAN                     
----------------------------------------------------
 Nested Loop Left Join
   Join Filter: (tenk1.unique1 = 1)
   ->  Index Only Scan using tenk1_unique1 on tenk1
   ->  Materialize
         ->  Result
(5 rows)

explain (costs off)
select unique1, x from tenk1 right join f_immutable_int4(1) x on unique1 = x;
                     QUERY PLAN                     
----------------------------------------------------
 Nested Loop Left Join
   ->  Result
   ->  Index Only Scan using tenk1_unique1 on tenk1
         Index Cond: (unique1 = 1)
(4 rows)

explain (costs off)
select unique1, x from tenk1 full join f_immutable_int4(1) x on unique1 = x;
                     QUERY PLAN                     
----------------------------------------------------
 Merge Full Join
   Merge Cond: (tenk1.unique1 = (1))
   ->  Index Only Scan using tenk1_unique1 on tenk1
   ->  Sort
         Sort Key: (1)
         ->  Result
(6 rows)

-- check that pullup of a const function allows further const-folding
explain (costs off)
select unique1 from tenk1, f_immutable_int4(1) x where x = 42;
        QUERY PLAN        
--------------------------
 Result
   One-Time Filter: false
(2 rows)

-- test inlining of immutable functions with PlaceHolderVars
explain (costs off)
select nt3.id
from nt3 as nt3
  left join
    (select nt2.*, (nt2.b1 or i4 = 42) AS b3
     from nt2 as nt2
       left join
         f_immutable_int4(0) i4
         on i4 = nt2.nt1_id
    ) as ss2
    on ss2.id = nt3.nt2_id
where nt3.id = 1 and ss2.b3;
                  QUERY PLAN                  
----------------------------------------------
 Nested Loop Left Join
   Filter: ((nt2.b1 OR ((0) = 42)))
   ->  Index Scan using nt3_pkey on nt3
         Index Cond: (id = 1)
   ->  Nested Loop Left Join
         Join Filter: (0 = nt2.nt1_id)
         ->  Index Scan using nt2_pkey on nt2
               Index Cond: (id = nt3.nt2_id)
         ->  Result
(9 rows)

drop function f_immutable_int4(int);
-- test inlining when function returns composite
create function mki8(bigint, bigint) returns int8_tbl as
$$select row($1,$2)::int8_tbl$$ language sql;
create function mki4(int) returns int4_tbl as
$$select row($1)::int4_tbl$$ language sql;
explain (verbose, costs off)
select * from mki8(1,2);
             QUERY PLAN             
------------------------------------
 Function Scan on mki8
   Output: q1, q2
   Function Call: '(1,2)'::int8_tbl
(3 rows)

select * from mki8(1,2);
 q1 | q2 
----+----
  1 |  2
(1 row)

explain (verbose, costs off)
select * from mki4(42);
            QUERY PLAN             
-----------------------------------
 Function Scan on mki4
   Output: f1
   Function Call: '(42)'::int4_tbl
(3 rows)

select * from mki4(42);
 f1 
----
 42
(1 row)

drop function mki8(bigint, bigint);
drop function mki4(int);
--
-- 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: (hundred = t1.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: (hundred = t1.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 (tenthous = i2.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)
(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: (unique2 = int8_tbl.q2)
(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)

explain (costs off)
select * from
(values (1, array[10,20]), (2, array[20,30])) as v1(v1x,v1ys)
left join (values (1, 10), (2, 20)) as v2(v2x,v2y) on v2x = v1x
left join unnest(v1ys) as u1(u1y) on u1y = v2y;
                         QUERY PLAN                          
-------------------------------------------------------------
 Nested Loop Left Join
   ->  Values Scan on "*VALUES*"
   ->  Hash Right Join
         Hash Cond: (u1.u1y = "*VALUES*_1".column2)
         Filter: ("*VALUES*_1".column1 = "*VALUES*".column1)
         ->  Function Scan on unnest u1
         ->  Hash
               ->  Values Scan on "*VALUES*_1"
(8 rows)

select * from
(values (1, array[10,20]), (2, array[20,30])) as v1(v1x,v1ys)
left join (values (1, 10), (2, 20)) as v2(v2x,v2y) on v2x = v1x
left join unnest(v1ys) as u1(u1y) on u1y = v2y;
 v1x |  v1ys   | v2x | v2y | u1y 
-----+---------+-----+-----+-----
   1 | {10,20} |   1 |  10 |  10
   2 | {20,30} |   2 |  20 |  20
(2 rows)

--
-- 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: (unique2 = a.q1)
(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 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)
   ->  Memoize
         Output: (i8.q1), t2.f1
         Cache Key: i8.q1
         Cache Mode: binary
         ->  Limit
               Output: (i8.q1), t2.f1
               ->  Seq Scan on public.text_tbl t2
                     Output: i8.q1, t2.f1
(20 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)
         ->  Memoize
               Output: (i8.q1), t2.f1
               Cache Key: i8.q1
               Cache Mode: binary
               ->  Limit
                     Output: (i8.q1), t2.f1
                     ->  Seq Scan on public.text_tbl t2
                           Output: i8.q1, t2.f1
   ->  Memoize
         Output: ((i8.q1)), (t2.f1)
         Cache Key: (i8.q1), t2.f1
         Cache Mode: binary
         ->  Limit
               Output: ((i8.q1)), (t2.f1)
               ->  Seq Scan on public.text_tbl t3
                     Output: (i8.q1), t2.f1
(30 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)
   ->  Memoize
         Output: ss1.c0
         Cache Key: tt4.f1
         Cache Mode: binary
         ->  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
(33 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 successful handling of full join underneath left join (bug #14105)
--
explain (costs off)
select * from
  (select 1 as id) as xx
  left join
    (tenk1 as a1 full join (select 1 as id) as yy on (a1.unique1 = yy.id))
  on (xx.id = coalesce(yy.id));
              QUERY PLAN               
---------------------------------------
 Nested Loop Left Join
   ->  Result
   ->  Hash Full Join
         Hash Cond: (a1.unique1 = (1))
         Filter: (1 = COALESCE((1)))
         ->  Seq Scan on tenk1 a1
         ->  Hash
               ->  Result
(8 rows)

select * from
  (select 1 as id) as xx
  left join
    (tenk1 as a1 full join (select 1 as id) as yy on (a1.unique1 = yy.id))
  on (xx.id = coalesce(yy.id));
 id | unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4 | id 
----+---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------+----
  1 |       1 |    2838 |   1 |    1 |   1 |      1 |       1 |        1 |           1 |         1 |        1 |   2 |    3 | BAAAAA   | EFEAAA   | OOOOxx  |  1
(1 row)

--
-- 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 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)

-- check join removal with lateral references
explain (costs off)
select 1 from (select a.id FROM a left join b on a.b_id = b.id) q,
			  lateral generate_series(1, q.id) gs(i) where q.id = gs.i;
                QUERY PLAN                 
-------------------------------------------
 Nested Loop
   ->  Seq Scan on a
   ->  Function Scan on generate_series gs
         Filter: (a.id = i)
(4 rows)

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;
-- test case to expose miscomputation of required relid set for a PHV
explain (verbose, costs off)
select i8.*, ss.v, t.unique2
  from int8_tbl i8
    left join int4_tbl i4 on i4.f1 = 1
    left join lateral (select i4.f1 + 1 as v) as ss on true
    left join tenk1 t on t.unique2 = ss.v
where q2 = 456;
                         QUERY PLAN                          
-------------------------------------------------------------
 Nested Loop Left Join
   Output: i8.q1, i8.q2, ((i4.f1 + 1)), t.unique2
   ->  Nested Loop Left Join
         Output: i8.q1, i8.q2, (i4.f1 + 1)
         ->  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
               Filter: (i4.f1 = 1)
   ->  Index Only Scan using tenk1_unique2 on public.tenk1 t
         Output: t.unique2
         Index Cond: (t.unique2 = ((i4.f1 + 1)))
(13 rows)

select i8.*, ss.v, t.unique2
  from int8_tbl i8
    left join int4_tbl i4 on i4.f1 = 1
    left join lateral (select i4.f1 + 1 as v) as ss on true
    left join tenk1 t on t.unique2 = ss.v
where q2 = 456;
 q1  | q2  | v | unique2 
-----+-----+---+---------
 123 | 456 |   |        
(1 row)

-- and check a related issue where we miscompute required relids for
-- a PHV that's been translated to a child rel
create temp table parttbl (a integer primary key) partition by range (a);
create temp table parttbl1 partition of parttbl for values from (1) to (100);
insert into parttbl values (11), (12);
explain (costs off)
select * from
  (select *, 12 as phv from parttbl) as ss
  right join int4_tbl on true
where ss.a = ss.phv and f1 = 0;
             QUERY PLAN             
------------------------------------
 Nested Loop
   ->  Seq Scan on int4_tbl
         Filter: (f1 = 0)
   ->  Seq Scan on parttbl1 parttbl
         Filter: (a = 12)
(5 rows)

select * from
  (select *, 12 as phv from parttbl) as ss
  right join int4_tbl on true
where ss.a = ss.phv and f1 = 0;
 a  | phv | f1 
----+-----+----
 12 |  12 |  0
(1 row)

-- 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" suggestion
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: (unique1 = x.f1)
(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
         ->  Memoize
               Cache Key: a.two
               Cache Mode: binary
               ->  Function Scan on generate_series g
(7 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
         ->  Memoize
               Cache Key: a.two
               Cache Mode: binary
               ->  Function Scan on generate_series g
(7 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
         ->  Memoize
               Cache Key: a.two
               Cache Mode: binary
               ->  Function Scan on generate_series g
(7 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
   ->  Nested Loop
         ->  Nested Loop
               ->  Index Only Scan using tenk1_unique1 on tenk1 a
               ->  Values Scan on "*VALUES*"
         ->  Memoize
               Cache Key: "*VALUES*".column1
               Cache Mode: logical
               ->  Index Only Scan using tenk1_unique2 on tenk1 b
                     Index Cond: (unique2 = "*VALUES*".column1)
(10 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
  order by a.q1, a.q2, x.q1, x.q2, ss.z;
                   QUERY PLAN                   
------------------------------------------------
 Sort
   Sort Key: a.q1, a.q2, x.q1, x.q2, (a.q1)
   ->  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
(9 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
  order by a.q1, a.q2, x.q1, x.q2, ss.z;
        q1        |        q2         |        q1        |        q2         |        z         
------------------+-------------------+------------------+-------------------+------------------
              123 |               456 |              123 |               456 |                 
              123 |               456 |              123 |  4567890123456789 |                 
              123 |               456 | 4567890123456789 | -4567890123456789 |                 
              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 |  4567890123456789 |              123 |               456 |                 
              123 |  4567890123456789 |              123 |  4567890123456789 |                 
              123 |  4567890123456789 | 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 |                 
 4567890123456789 | -4567890123456789 |              123 |               456 |                 
 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 | 4567890123456789 | -4567890123456789 |                 
 4567890123456789 | -4567890123456789 | 4567890123456789 |               123 |                 
 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 |              123 |               456 |                 
 4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 | 4567890123456789 | -4567890123456789 |                 
 4567890123456789 |               123 | 4567890123456789 |               123 |                 
 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 |              123 |               456 |                 
 4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 | 4567890123456789 | -4567890123456789 |                 
 4567890123456789 |  4567890123456789 | 4567890123456789 |               123 |                 
 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 4567890123456789 |  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)

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 onerow union all select x.q2,y.q2 from onerow) 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 dummy rels with lateral references (bug #15694)
explain (verbose, costs off)
select * from int8_tbl i8 left join lateral
  (select *, i8.q2 from int4_tbl where false) ss on true;
              QUERY PLAN              
--------------------------------------
 Nested Loop Left Join
   Output: i8.q1, i8.q2, f1, (i8.q2)
   ->  Seq Scan on public.int8_tbl i8
         Output: i8.q1, i8.q2
   ->  Result
         Output: f1, i8.q2
         One-Time Filter: false
(7 rows)

explain (verbose, costs off)
select * from int8_tbl i8 left join lateral
  (select *, i8.q2 from int4_tbl i1, int4_tbl i2 where false) ss on true;
               QUERY PLAN                
-----------------------------------------
 Nested Loop Left Join
   Output: i8.q1, i8.q2, f1, f1, (i8.q2)
   ->  Seq Scan on public.int8_tbl i8
         Output: i8.q1, i8.q2
   ->  Result
         Output: f1, f1, i8.q2
         One-Time Filter: false
(7 rows)

-- check handling of nested appendrels inside LATERAL
select * from
  ((select 2 as v) union all (select 3 as v)) as q1
  cross join lateral
  ((select * from
      ((select 4 as v) union all (select 5 as v)) as q3)
   union all
   (select q1.v)
  ) as q2;
 v | v 
---+---
 2 | 4
 2 | 5
 2 | 2
 3 | 4
 3 | 5
 3 | 3
(6 rows)

-- check the number of columns specified
SELECT * FROM (int8_tbl i cross join int4_tbl j) ss(a,b,c,d);
ERROR:  join expression "ss" has 3 columns available but 4 columns specified
-- 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.
--
-- test LATERAL reference propagation down a multi-level inheritance hierarchy
-- produced for a multi-level partitioned table hierarchy.
--
create table join_pt1 (a int, b int, c varchar) partition by range(a);
create table join_pt1p1 partition of join_pt1 for values from (0) to (100) partition by range(b);
create table join_pt1p2 partition of join_pt1 for values from (100) to (200);
create table join_pt1p1p1 partition of join_pt1p1 for values from (0) to (100);
insert into join_pt1 values (1, 1, 'x'), (101, 101, 'y');
create table join_ut1 (a int, b int, c varchar);
insert into join_ut1 values (101, 101, 'y'), (2, 2, 'z');
explain (verbose, costs off)
select t1.b, ss.phv from join_ut1 t1 left join lateral
              (select t2.a as t2a, t3.a t3a, least(t1.a, t2.a, t3.a) phv
					  from join_pt1 t2 join join_ut1 t3 on t2.a = t3.b) ss
              on t1.a = ss.t2a order by t1.a;
                             QUERY PLAN                             
--------------------------------------------------------------------
 Sort
   Output: t1.b, (LEAST(t1.a, t2.a, t3.a)), t1.a
   Sort Key: t1.a
   ->  Nested Loop Left Join
         Output: t1.b, (LEAST(t1.a, t2.a, t3.a)), t1.a
         ->  Seq Scan on public.join_ut1 t1
               Output: t1.a, t1.b, t1.c
         ->  Hash Join
               Output: t2.a, LEAST(t1.a, t2.a, t3.a)
               Hash Cond: (t3.b = t2.a)
               ->  Seq Scan on public.join_ut1 t3
                     Output: t3.a, t3.b, t3.c
               ->  Hash
                     Output: t2.a
                     ->  Append
                           ->  Seq Scan on public.join_pt1p1p1 t2_1
                                 Output: t2_1.a
                                 Filter: (t1.a = t2_1.a)
                           ->  Seq Scan on public.join_pt1p2 t2_2
                                 Output: t2_2.a
                                 Filter: (t1.a = t2_2.a)
(21 rows)

select t1.b, ss.phv from join_ut1 t1 left join lateral
              (select t2.a as t2a, t3.a t3a, least(t1.a, t2.a, t3.a) phv
					  from join_pt1 t2 join join_ut1 t3 on t2.a = t3.b) ss
              on t1.a = ss.t2a order by t1.a;
  b  | phv 
-----+-----
   2 |    
 101 | 101
(2 rows)

drop table join_pt1;
drop table join_ut1;
--
-- test estimation behavior with multi-column foreign key and constant qual
--
begin;
create table fkest (x integer, x10 integer, x10b integer, x100 integer);
insert into fkest select x, x/10, x/10, x/100 from generate_series(1,1000) x;
create unique index on fkest(x, x10, x100);
analyze fkest;
explain (costs off)
select * from fkest f1
  join fkest f2 on (f1.x = f2.x and f1.x10 = f2.x10b and f1.x100 = f2.x100)
  join fkest f3 on f1.x = f3.x
  where f1.x100 = 2;
                        QUERY PLAN                         
-----------------------------------------------------------
 Nested Loop
   ->  Hash Join
         Hash Cond: ((f2.x = f1.x) AND (f2.x10b = f1.x10))
         ->  Seq Scan on fkest f2
               Filter: (x100 = 2)
         ->  Hash
               ->  Seq Scan on fkest f1
                     Filter: (x100 = 2)
   ->  Index Scan using fkest_x_x10_x100_idx on fkest f3
         Index Cond: (x = f1.x)
(10 rows)

alter table fkest add constraint fk
  foreign key (x, x10b, x100) references fkest (x, x10, x100);
explain (costs off)
select * from fkest f1
  join fkest f2 on (f1.x = f2.x and f1.x10 = f2.x10b and f1.x100 = f2.x100)
  join fkest f3 on f1.x = f3.x
  where f1.x100 = 2;
                     QUERY PLAN                      
-----------------------------------------------------
 Hash Join
   Hash Cond: ((f2.x = f1.x) AND (f2.x10b = f1.x10))
   ->  Hash Join
         Hash Cond: (f3.x = f2.x)
         ->  Seq Scan on fkest f3
         ->  Hash
               ->  Seq Scan on fkest f2
                     Filter: (x100 = 2)
   ->  Hash
         ->  Seq Scan on fkest f1
               Filter: (x100 = 2)
(11 rows)

rollback;
--
-- test that foreign key join estimation performs sanely for outer joins
--
begin;
create table fkest (a int, b int, c int unique, primary key(a,b));
create table fkest1 (a int, b int, primary key(a,b));
insert into fkest select x/10, x%10, x from generate_series(1,1000) x;
insert into fkest1 select x/10, x%10 from generate_series(1,1000) x;
alter table fkest1
  add constraint fkest1_a_b_fkey foreign key (a,b) references fkest;
analyze fkest;
analyze fkest1;
explain (costs off)
select *
from fkest f
  left join fkest1 f1 on f.a = f1.a and f.b = f1.b
  left join fkest1 f2 on f.a = f2.a and f.b = f2.b
  left join fkest1 f3 on f.a = f3.a and f.b = f3.b
where f.c = 1;
                            QUERY PLAN                            
------------------------------------------------------------------
 Nested Loop Left Join
   ->  Nested Loop Left Join
         ->  Nested Loop Left Join
               ->  Index Scan using fkest_c_key on fkest f
                     Index Cond: (c = 1)
               ->  Index Only Scan using fkest1_pkey on fkest1 f1
                     Index Cond: ((a = f.a) AND (b = f.b))
         ->  Index Only Scan using fkest1_pkey on fkest1 f2
               Index Cond: ((a = f.a) AND (b = f.b))
   ->  Index Only Scan using fkest1_pkey on fkest1 f3
         Index Cond: ((a = f.a) AND (b = f.b))
(11 rows)

rollback;
--
-- test planner's ability to mark joins as unique
--
create table j1 (id int primary key);
create table j2 (id int primary key);
create table j3 (id int);
insert into j1 values(1),(2),(3);
insert into j2 values(1),(2),(3);
insert into j3 values(1),(1);
analyze j1;
analyze j2;
analyze j3;
-- ensure join is properly marked as unique
explain (verbose, costs off)
select * from j1 inner join j2 on j1.id = j2.id;
            QUERY PLAN             
-----------------------------------
 Hash Join
   Output: j1.id, j2.id
   Inner Unique: true
   Hash Cond: (j1.id = j2.id)
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Hash
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(10 rows)

-- ensure join is not unique when not an equi-join
explain (verbose, costs off)
select * from j1 inner join j2 on j1.id > j2.id;
            QUERY PLAN             
-----------------------------------
 Nested Loop
   Output: j1.id, j2.id
   Join Filter: (j1.id > j2.id)
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Materialize
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(9 rows)

-- ensure non-unique rel is not chosen as inner
explain (verbose, costs off)
select * from j1 inner join j3 on j1.id = j3.id;
            QUERY PLAN             
-----------------------------------
 Hash Join
   Output: j1.id, j3.id
   Inner Unique: true
   Hash Cond: (j3.id = j1.id)
   ->  Seq Scan on public.j3
         Output: j3.id
   ->  Hash
         Output: j1.id
         ->  Seq Scan on public.j1
               Output: j1.id
(10 rows)

-- ensure left join is marked as unique
explain (verbose, costs off)
select * from j1 left join j2 on j1.id = j2.id;
            QUERY PLAN             
-----------------------------------
 Hash Left Join
   Output: j1.id, j2.id
   Inner Unique: true
   Hash Cond: (j1.id = j2.id)
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Hash
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(10 rows)

-- ensure right join is marked as unique
explain (verbose, costs off)
select * from j1 right join j2 on j1.id = j2.id;
            QUERY PLAN             
-----------------------------------
 Hash Left Join
   Output: j1.id, j2.id
   Inner Unique: true
   Hash Cond: (j2.id = j1.id)
   ->  Seq Scan on public.j2
         Output: j2.id
   ->  Hash
         Output: j1.id
         ->  Seq Scan on public.j1
               Output: j1.id
(10 rows)

-- ensure full join is marked as unique
explain (verbose, costs off)
select * from j1 full join j2 on j1.id = j2.id;
            QUERY PLAN             
-----------------------------------
 Hash Full Join
   Output: j1.id, j2.id
   Inner Unique: true
   Hash Cond: (j1.id = j2.id)
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Hash
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(10 rows)

-- a clauseless (cross) join can't be unique
explain (verbose, costs off)
select * from j1 cross join j2;
            QUERY PLAN             
-----------------------------------
 Nested Loop
   Output: j1.id, j2.id
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Materialize
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(8 rows)

-- ensure a natural join is marked as unique
explain (verbose, costs off)
select * from j1 natural join j2;
            QUERY PLAN             
-----------------------------------
 Hash Join
   Output: j1.id
   Inner Unique: true
   Hash Cond: (j1.id = j2.id)
   ->  Seq Scan on public.j1
         Output: j1.id
   ->  Hash
         Output: j2.id
         ->  Seq Scan on public.j2
               Output: j2.id
(10 rows)

-- ensure a distinct clause allows the inner to become unique
explain (verbose, costs off)
select * from j1
inner join (select distinct id from j3) j3 on j1.id = j3.id;
               QUERY PLAN                
-----------------------------------------
 Nested Loop
   Output: j1.id, j3.id
   Inner Unique: true
   Join Filter: (j1.id = j3.id)
   ->  Unique
         Output: j3.id
         ->  Sort
               Output: j3.id
               Sort Key: j3.id
               ->  Seq Scan on public.j3
                     Output: j3.id
   ->  Seq Scan on public.j1
         Output: j1.id
(13 rows)

-- ensure group by clause allows the inner to become unique
explain (verbose, costs off)
select * from j1
inner join (select id from j3 group by id) j3 on j1.id = j3.id;
               QUERY PLAN                
-----------------------------------------
 Nested Loop
   Output: j1.id, j3.id
   Inner Unique: true
   Join Filter: (j1.id = j3.id)
   ->  Group
         Output: j3.id
         Group Key: j3.id
         ->  Sort
               Output: j3.id
               Sort Key: j3.id
               ->  Seq Scan on public.j3
                     Output: j3.id
   ->  Seq Scan on public.j1
         Output: j1.id
(14 rows)

drop table j1;
drop table j2;
drop table j3;
-- test more complex permutations of unique joins
create table j1 (id1 int, id2 int, primary key(id1,id2));
create table j2 (id1 int, id2 int, primary key(id1,id2));
create table j3 (id1 int, id2 int, primary key(id1,id2));
insert into j1 values(1,1),(1,2);
insert into j2 values(1,1);
insert into j3 values(1,1);
analyze j1;
analyze j2;
analyze j3;
-- ensure there's no unique join when not all columns which are part of the
-- unique index are seen in the join clause
explain (verbose, costs off)
select * from j1
inner join j2 on j1.id1 = j2.id1;
                QUERY PLAN                
------------------------------------------
 Nested Loop
   Output: j1.id1, j1.id2, j2.id1, j2.id2
   Join Filter: (j1.id1 = j2.id1)
   ->  Seq Scan on public.j2
         Output: j2.id1, j2.id2
   ->  Seq Scan on public.j1
         Output: j1.id1, j1.id2
(7 rows)

-- ensure proper unique detection with multiple join quals
explain (verbose, costs off)
select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2;
                        QUERY PLAN                        
----------------------------------------------------------
 Nested Loop
   Output: j1.id1, j1.id2, j2.id1, j2.id2
   Inner Unique: true
   Join Filter: ((j1.id1 = j2.id1) AND (j1.id2 = j2.id2))
   ->  Seq Scan on public.j2
         Output: j2.id1, j2.id2
   ->  Seq Scan on public.j1
         Output: j1.id1, j1.id2
(8 rows)

-- ensure we don't detect the join to be unique when quals are not part of the
-- join condition
explain (verbose, costs off)
select * from j1
inner join j2 on j1.id1 = j2.id1 where j1.id2 = 1;
                QUERY PLAN                
------------------------------------------
 Nested Loop
   Output: j1.id1, j1.id2, j2.id1, j2.id2
   Join Filter: (j1.id1 = j2.id1)
   ->  Seq Scan on public.j1
         Output: j1.id1, j1.id2
         Filter: (j1.id2 = 1)
   ->  Seq Scan on public.j2
         Output: j2.id1, j2.id2
(8 rows)

-- as above, but for left joins.
explain (verbose, costs off)
select * from j1
left join j2 on j1.id1 = j2.id1 where j1.id2 = 1;
                QUERY PLAN                
------------------------------------------
 Nested Loop Left Join
   Output: j1.id1, j1.id2, j2.id1, j2.id2
   Join Filter: (j1.id1 = j2.id1)
   ->  Seq Scan on public.j1
         Output: j1.id1, j1.id2
         Filter: (j1.id2 = 1)
   ->  Seq Scan on public.j2
         Output: j2.id1, j2.id2
(8 rows)

-- validate logic in merge joins which skips mark and restore.
-- it should only do this if all quals which were used to detect the unique
-- are present as join quals, and not plain quals.
set enable_nestloop to 0;
set enable_hashjoin to 0;
set enable_sort to 0;
-- create indexes that will be preferred over the PKs to perform the join
create index j1_id1_idx on j1 (id1) where id1 % 1000 = 1;
create index j2_id1_idx on j2 (id1) where id1 % 1000 = 1;
-- need an additional row in j2, if we want j2_id1_idx to be preferred
insert into j2 values(1,2);
analyze j2;
explain (costs off) select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1;
               QUERY PLAN                
-----------------------------------------
 Merge Join
   Merge Cond: (j1.id1 = j2.id1)
   Join Filter: (j1.id2 = j2.id2)
   ->  Index Scan using j1_id1_idx on j1
   ->  Index Scan using j2_id1_idx on j2
(5 rows)

select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1;
 id1 | id2 | id1 | id2 
-----+-----+-----+-----
   1 |   1 |   1 |   1
   1 |   2 |   1 |   2
(2 rows)

-- Exercise array keys mark/restore B-Tree code
explain (costs off) select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 = any (array[1]);
                     QUERY PLAN                     
----------------------------------------------------
 Merge Join
   Merge Cond: (j1.id1 = j2.id1)
   Join Filter: (j1.id2 = j2.id2)
   ->  Index Scan using j1_id1_idx on j1
   ->  Index Scan using j2_id1_idx on j2
         Index Cond: (id1 = ANY ('{1}'::integer[]))
(6 rows)

select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 = any (array[1]);
 id1 | id2 | id1 | id2 
-----+-----+-----+-----
   1 |   1 |   1 |   1
   1 |   2 |   1 |   2
(2 rows)

-- Exercise array keys "find extreme element" B-Tree code
explain (costs off) select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 >= any (array[1,5]);
                      QUERY PLAN                       
-------------------------------------------------------
 Merge Join
   Merge Cond: (j1.id1 = j2.id1)
   Join Filter: (j1.id2 = j2.id2)
   ->  Index Scan using j1_id1_idx on j1
   ->  Index Only Scan using j2_pkey on j2
         Index Cond: (id1 >= ANY ('{1,5}'::integer[]))
         Filter: ((id1 % 1000) = 1)
(7 rows)

select * from j1
inner join j2 on j1.id1 = j2.id1 and j1.id2 = j2.id2
where j1.id1 % 1000 = 1 and j2.id1 % 1000 = 1 and j2.id1 >= any (array[1,5]);
 id1 | id2 | id1 | id2 
-----+-----+-----+-----
   1 |   1 |   1 |   1
   1 |   2 |   1 |   2
(2 rows)

reset enable_nestloop;
reset enable_hashjoin;
reset enable_sort;
drop table j1;
drop table j2;
drop table j3;
-- check that semijoin inner is not seen as unique for a portion of the outerrel
explain (verbose, costs off)
select t1.unique1, t2.hundred
from onek t1, tenk1 t2
where exists (select 1 from tenk1 t3
              where t3.thousand = t1.unique1 and t3.tenthous = t2.hundred)
      and t1.unique1 < 1;
                                   QUERY PLAN                                    
---------------------------------------------------------------------------------
 Nested Loop
   Output: t1.unique1, t2.hundred
   ->  Hash Join
         Output: t1.unique1, t3.tenthous
         Hash Cond: (t3.thousand = t1.unique1)
         ->  HashAggregate
               Output: t3.thousand, t3.tenthous
               Group Key: t3.thousand, t3.tenthous
               ->  Index Only Scan using tenk1_thous_tenthous on public.tenk1 t3
                     Output: t3.thousand, t3.tenthous
         ->  Hash
               Output: t1.unique1
               ->  Index Only Scan using onek_unique1 on public.onek t1
                     Output: t1.unique1
                     Index Cond: (t1.unique1 < 1)
   ->  Index Only Scan using tenk1_hundred on public.tenk1 t2
         Output: t2.hundred
         Index Cond: (t2.hundred = t3.tenthous)
(18 rows)

-- ... unless it actually is unique
create table j3 as select unique1, tenthous from onek;
vacuum analyze j3;
create unique index on j3(unique1, tenthous);
explain (verbose, costs off)
select t1.unique1, t2.hundred
from onek t1, tenk1 t2
where exists (select 1 from j3
              where j3.unique1 = t1.unique1 and j3.tenthous = t2.hundred)
      and t1.unique1 < 1;
                               QUERY PLAN                               
------------------------------------------------------------------------
 Nested Loop
   Output: t1.unique1, t2.hundred
   ->  Nested Loop
         Output: t1.unique1, j3.tenthous
         ->  Index Only Scan using onek_unique1 on public.onek t1
               Output: t1.unique1
               Index Cond: (t1.unique1 < 1)
         ->  Index Only Scan using j3_unique1_tenthous_idx on public.j3
               Output: j3.unique1, j3.tenthous
               Index Cond: (j3.unique1 = t1.unique1)
   ->  Index Only Scan using tenk1_hundred on public.tenk1 t2
         Output: t2.hundred
         Index Cond: (t2.hundred = j3.tenthous)
(13 rows)

drop table j3;