SELECT t1.a, t1.c, t2.b, t2.c FROM prt1 t1 RIGHT JOIN prt2 t2 ON t1.a = t2.b WHERE t2.a = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
0 | 0000 | 0 | 0000
150 | 0150 | 150 | 0150
300 | 0300 | 300 | 0300
450 | 0450 | 450 | 0450
| | 75 | 0075
| | 225 | 0225
| | 375 | 0375
| | 525 | 0525
(8 rows)
-- full outer join, with placeholder vars
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT 50 phv, * FROM prt1 WHERE prt1.b = 0) t1 FULL JOIN (SELECT 75 phv, * FROM prt2 WHERE prt2.a = 0) t2 ON (t1.a = t2.b) WHERE t1.phv = t1.a OR t2.phv = t2.b ORDER BY t1.a, t2.b;
Filter: (((50) = prt1_p1.a) OR ((75) = prt2_p1.b))
-> Seq Scan on prt1_p1
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_p1
Filter: (a = 0)
-> Hash Full Join
Hash Cond: (prt1_p2.a = prt2_p2.b)
Filter: (((50) = prt1_p2.a) OR ((75) = prt2_p2.b))
-> Seq Scan on prt1_p2
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_p2
Filter: (a = 0)
-> Hash Full Join
Hash Cond: (prt1_p3.a = prt2_p3.b)
Filter: (((50) = prt1_p3.a) OR ((75) = prt2_p3.b))
-> Seq Scan on prt1_p3
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_p3
Filter: (a = 0)
(27 rows)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT 50 phv, * FROM prt1 WHERE prt1.b = 0) t1 FULL JOIN (SELECT 75 phv, * FROM prt2 WHERE prt2.a = 0) t2 ON (t1.a = t2.b) WHERE t1.phv = t1.a OR t2.phv = t2.b ORDER BY t1.a, t2.b;
a | c | b | c
----+------+----+------
50 | 0050 | |
| | 75 | 0075
(2 rows)
-- Join with pruned partitions from joining relations
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM prt1 t1, prt2 t2 WHERE t1.a = t2.b AND t1.a < 450 AND t2.b > 250 AND t1.b = 0 ORDER BY t1.a, t2.b;
SELECT t1.a, t1.c, t2.b, t2.c FROM prt1 t1, prt2 t2 WHERE t1.a = t2.b AND t1.a < 450 AND t2.b > 250 AND t1.b = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
300 | 0300 | 300 | 0300
(1 row)
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1 WHERE a < 450) t1 LEFT JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 ORDER BY t1.a, t2.b;
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1 WHERE a < 450) t1 LEFT JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
0 | 0000 | |
50 | 0050 | |
100 | 0100 | |
150 | 0150 | |
200 | 0200 | |
250 | 0250 | |
300 | 0300 | 300 | 0300
350 | 0350 | |
400 | 0400 | |
(9 rows)
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1 WHERE a < 450) t1 FULL JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 OR t2.a = 0 ORDER BY t1.a, t2.b;
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1 WHERE a < 450) t1 FULL JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 OR t2.a = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
0 | 0000 | |
50 | 0050 | |
100 | 0100 | |
150 | 0150 | |
200 | 0200 | |
250 | 0250 | |
300 | 0300 | 300 | 0300
350 | 0350 | |
400 | 0400 | |
| | 375 | 0375
| | 450 | 0450
| | 525 | 0525
(12 rows)
-- Semi-join
EXPLAIN (COSTS OFF)
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t2.b FROM prt2 t2 WHERE t2.a = 0) AND t1.b = 0 ORDER BY t1.a;
SELECT t1.a, t1.c, t2.b, t2.c FROM prt1_e t1, prt2_e t2 WHERE (t1.a + t1.b)/2 = (t2.b + t2.a)/2 AND t1.c = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+---+-----+---
0 | 0 | 0 | 0
150 | 0 | 150 | 0
300 | 0 | 300 | 0
450 | 0 | 450 | 0
(4 rows)
--
-- N-way join
--
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM prt1 t1, prt2 t2, prt1_e t3 WHERE t1.a = t2.b AND t1.a = (t3.a + t3.b)/2 AND t1.b = 0 ORDER BY t1.a, t2.b;
-> Index Scan using iprt1_e_p1_ab2 on prt1_e_p1 t3
Index Cond: (((a + b) / 2) = t2.b)
-> Nested Loop
Join Filter: (t1_1.a = ((t3_1.a + t3_1.b) / 2))
-> Hash Join
Hash Cond: (t2_1.b = t1_1.a)
-> Seq Scan on prt2_p2 t2_1
-> Hash
-> Seq Scan on prt1_p2 t1_1
Filter: (b = 0)
-> Index Scan using iprt1_e_p2_ab2 on prt1_e_p2 t3_1
Index Cond: (((a + b) / 2) = t2_1.b)
-> Nested Loop
Join Filter: (t1_2.a = ((t3_2.a + t3_2.b) / 2))
-> Hash Join
Hash Cond: (t2_2.b = t1_2.a)
-> Seq Scan on prt2_p3 t2_2
-> Hash
-> Seq Scan on prt1_p3 t1_2
Filter: (b = 0)
-> Index Scan using iprt1_e_p3_ab2 on prt1_e_p3 t3_2
Index Cond: (((a + b) / 2) = t2_2.b)
(34 rows)
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM prt1 t1, prt2 t2, prt1_e t3 WHERE t1.a = t2.b AND t1.a = (t3.a + t3.b)/2 AND t1.b = 0 ORDER BY t1.a, t2.b;
a | c | b | c | ?column? | c
-----+------+-----+------+----------+---
0 | 0000 | 0 | 0000 | 0 | 0
150 | 0150 | 150 | 0150 | 300 | 0
300 | 0300 | 300 | 0300 | 600 | 0
450 | 0450 | 450 | 0450 | 900 | 0
(4 rows)
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) LEFT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t1.b = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) LEFT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t1.b = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
a | c | b | c | ?column? | c
-----+------+-----+------+----------+---
0 | 0000 | 0 | 0000 | 0 | 0
50 | 0050 | | | 100 | 0
100 | 0100 | | | 200 | 0
150 | 0150 | 150 | 0150 | 300 | 0
200 | 0200 | | | 400 | 0
250 | 0250 | | | 500 | 0
300 | 0300 | 300 | 0300 | 600 | 0
350 | 0350 | | | 700 | 0
400 | 0400 | | | 800 | 0
450 | 0450 | 450 | 0450 | 900 | 0
500 | 0500 | | | 1000 | 0
550 | 0550 | | | 1100 | 0
(12 rows)
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) RIGHT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t3.c = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) RIGHT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t3.c = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
a | c | b | c | ?column? | c
-----+------+-----+------+----------+---
0 | 0000 | 0 | 0000 | 0 | 0
50 | 0050 | | | 100 | 0
100 | 0100 | | | 200 | 0
150 | 0150 | 150 | 0150 | 300 | 0
200 | 0200 | | | 400 | 0
250 | 0250 | | | 500 | 0
300 | 0300 | 300 | 0300 | 600 | 0
350 | 0350 | | | 700 | 0
400 | 0400 | | | 800 | 0
450 | 0450 | 450 | 0450 | 900 | 0
500 | 0500 | | | 1000 | 0
550 | 0550 | | | 1100 | 0
(12 rows)
-- Cases with non-nullable expressions in subquery results;
-- make sure these go to null as expected
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.phv, t2.b, t2.phv, t3.a + t3.b, t3.phv FROM ((SELECT 50 phv, * FROM prt1 WHERE prt1.b = 0) t1 FULL JOIN (SELECT 75 phv, * FROM prt2 WHERE prt2.a = 0) t2 ON (t1.a = t2.b)) FULL JOIN (SELECT 50 phv, * FROM prt1_e WHERE prt1_e.c = 0) t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t1.a = t1.phv OR t2.b = t2.phv OR (t3.a + t3.b)/2 = t3.phv ORDER BY t1.a, t2.b, t3.a + t3.b;
Filter: ((prt1_p3.a = (50)) OR (prt2_p3.b = (75)) OR (((prt1_e_p3.a + prt1_e_p3.b) / 2) = (50)))
-> Hash Full Join
Hash Cond: (prt1_p3.a = prt2_p3.b)
-> Seq Scan on prt1_p3
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_p3
Filter: (a = 0)
-> Hash
-> Seq Scan on prt1_e_p3
Filter: (c = 0)
(43 rows)
SELECT t1.a, t1.phv, t2.b, t2.phv, t3.a + t3.b, t3.phv FROM ((SELECT 50 phv, * FROM prt1 WHERE prt1.b = 0) t1 FULL JOIN (SELECT 75 phv, * FROM prt2 WHERE prt2.a = 0) t2 ON (t1.a = t2.b)) FULL JOIN (SELECT 50 phv, * FROM prt1_e WHERE prt1_e.c = 0) t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t1.a = t1.phv OR t2.b = t2.phv OR (t3.a + t3.b)/2 = t3.phv ORDER BY t1.a, t2.b, t3.a + t3.b;
a | phv | b | phv | ?column? | phv
----+-----+----+-----+----------+-----
50 | 50 | | | 100 | 50
| | 75 | 75 | |
(2 rows)
-- Semi-join
EXPLAIN (COSTS OFF)
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1, prt1_e t2 WHERE t1.a = 0 AND t1.b = (t2.a + t2.b)/2) AND t1.b = 0 ORDER BY t1.a;
-> Index Scan using iprt1_e_p3_ab2 on prt1_e_p3 t2_2
Index Cond: (((a + b) / 2) = t1_5.b)
-> Index Scan using iprt1_p3_a on prt1_p3 t1_2
Index Cond: (a = ((t2_2.a + t2_2.b) / 2))
Filter: (b = 0)
(41 rows)
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1, prt1_e t2 WHERE t1.a = 0 AND t1.b = (t2.a + t2.b)/2) AND t1.b = 0 ORDER BY t1.a;
a | b | c
-----+---+------
0 | 0 | 0000
150 | 0 | 0150
300 | 0 | 0300
450 | 0 | 0450
(4 rows)
EXPLAIN (COSTS OFF)
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1 WHERE t1.b IN (SELECT (t1.a + t1.b)/2 FROM prt1_e t1 WHERE t1.c = 0)) AND t1.b = 0 ORDER BY t1.a;
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1 WHERE t1.b IN (SELECT (t1.a + t1.b)/2 FROM prt1_e t1 WHERE t1.c = 0)) AND t1.b = 0 ORDER BY t1.a;
a | b | c
-----+---+------
0 | 0 | 0000
150 | 0 | 0150
300 | 0 | 0300
450 | 0 | 0450
(4 rows)
-- test merge joins
SET enable_hashjoin TO off;
SET enable_nestloop TO off;
EXPLAIN (COSTS OFF)
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1 WHERE t1.b IN (SELECT (t1.a + t1.b)/2 FROM prt1_e t1 WHERE t1.c = 0)) AND t1.b = 0 ORDER BY t1.a;
SELECT t1.* FROM prt1 t1 WHERE t1.a IN (SELECT t1.b FROM prt2 t1 WHERE t1.b IN (SELECT (t1.a + t1.b)/2 FROM prt1_e t1 WHERE t1.c = 0)) AND t1.b = 0 ORDER BY t1.a;
a | b | c
-----+---+------
0 | 0 | 0000
150 | 0 | 0150
300 | 0 | 0300
450 | 0 | 0450
(4 rows)
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) RIGHT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t3.c = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
SELECT t1.a, t1.c, t2.b, t2.c, t3.a + t3.b, t3.c FROM (prt1 t1 LEFT JOIN prt2 t2 ON t1.a = t2.b) RIGHT JOIN prt1_e t3 ON (t1.a = (t3.a + t3.b)/2) WHERE t3.c = 0 ORDER BY t1.a, t2.b, t3.a + t3.b;
a | c | b | c | ?column? | c
-----+------+-----+------+----------+---
0 | 0000 | 0 | 0000 | 0 | 0
50 | 0050 | | | 100 | 0
100 | 0100 | | | 200 | 0
150 | 0150 | 150 | 0150 | 300 | 0
200 | 0200 | | | 400 | 0
250 | 0250 | | | 500 | 0
300 | 0300 | 300 | 0300 | 600 | 0
350 | 0350 | | | 700 | 0
400 | 0400 | | | 800 | 0
450 | 0450 | 450 | 0450 | 900 | 0
500 | 0500 | | | 1000 | 0
550 | 0550 | | | 1100 | 0
(12 rows)
-- MergeAppend on nullable column
EXPLAIN (COSTS OFF)
SELECT t1.a, t2.b FROM (SELECT * FROM prt1 WHERE a < 450) t1 LEFT JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 ORDER BY t1.a, t2.b;
SELECT t1.a, t2.b FROM (SELECT * FROM prt1 WHERE a < 450) t1 LEFT JOIN (SELECT * FROM prt2 WHERE b > 250) t2 ON t1.a = t2.b WHERE t1.b = 0 ORDER BY t1.a, t2.b;
a | b
-----+-----
0 |
50 |
100 |
150 |
200 |
250 |
300 | 300
350 |
400 |
(9 rows)
RESET enable_hashjoin;
RESET enable_nestloop;
--
-- partitioned by multiple columns
--
CREATE TABLE prt1_m (a int, b int, c int) PARTITION BY RANGE(a, ((a + b)/2));
CREATE TABLE prt1_m_p1 PARTITION OF prt1_m FOR VALUES FROM (0, 0) TO (250, 250);
CREATE TABLE prt1_m_p2 PARTITION OF prt1_m FOR VALUES FROM (250, 250) TO (500, 500);
CREATE TABLE prt1_m_p3 PARTITION OF prt1_m FOR VALUES FROM (500, 500) TO (600, 600);
INSERT INTO prt1_m SELECT i, i, i % 25 FROM generate_series(0, 599, 2) i;
ANALYZE prt1_m;
CREATE TABLE prt2_m (a int, b int, c int) PARTITION BY RANGE(((b + a)/2), b);
CREATE TABLE prt2_m_p1 PARTITION OF prt2_m FOR VALUES FROM (0, 0) TO (250, 250);
CREATE TABLE prt2_m_p2 PARTITION OF prt2_m FOR VALUES FROM (250, 250) TO (500, 500);
CREATE TABLE prt2_m_p3 PARTITION OF prt2_m FOR VALUES FROM (500, 500) TO (600, 600);
INSERT INTO prt2_m SELECT i, i, i % 25 FROM generate_series(0, 599, 3) i;
ANALYZE prt2_m;
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1_m WHERE prt1_m.c = 0) t1 FULL JOIN (SELECT * FROM prt2_m WHERE prt2_m.c = 0) t2 ON (t1.a = (t2.b + t2.a)/2 AND t2.b = (t1.a + t1.b)/2) ORDER BY t1.a, t2.b;
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1_m WHERE prt1_m.c = 0) t1 FULL JOIN (SELECT * FROM prt2_m WHERE prt2_m.c = 0) t2 ON (t1.a = (t2.b + t2.a)/2 AND t2.b = (t1.a + t1.b)/2) ORDER BY t1.a, t2.b;
a | c | b | c
-----+---+-----+---
0 | 0 | 0 | 0
50 | 0 | |
100 | 0 | |
150 | 0 | 150 | 0
200 | 0 | |
250 | 0 | |
300 | 0 | 300 | 0
350 | 0 | |
400 | 0 | |
450 | 0 | 450 | 0
500 | 0 | |
550 | 0 | |
| | 75 | 0
| | 225 | 0
| | 375 | 0
| | 525 | 0
(16 rows)
--
-- tests for list partitioned tables.
--
CREATE TABLE plt1 (a int, b int, c text) PARTITION BY LIST(c);
CREATE TABLE plt1_p1 PARTITION OF plt1 FOR VALUES IN ('0000', '0003', '0004', '0010');
CREATE TABLE plt1_p2 PARTITION OF plt1 FOR VALUES IN ('0001', '0005', '0002', '0009');
CREATE TABLE plt1_p3 PARTITION OF plt1 FOR VALUES IN ('0006', '0007', '0008', '0011');
INSERT INTO plt1 SELECT i, i, to_char(i/50, 'FM0000') FROM generate_series(0, 599, 2) i;
ANALYZE plt1;
CREATE TABLE plt2 (a int, b int, c text) PARTITION BY LIST(c);
CREATE TABLE plt2_p1 PARTITION OF plt2 FOR VALUES IN ('0000', '0003', '0004', '0010');
CREATE TABLE plt2_p2 PARTITION OF plt2 FOR VALUES IN ('0001', '0005', '0002', '0009');
CREATE TABLE plt2_p3 PARTITION OF plt2 FOR VALUES IN ('0006', '0007', '0008', '0011');
INSERT INTO plt2 SELECT i, i, to_char(i/50, 'FM0000') FROM generate_series(0, 599, 3) i;
ANALYZE plt2;
--
-- list partitioned by expression
--
CREATE TABLE plt1_e (a int, b int, c text) PARTITION BY LIST(ltrim(c, 'A'));
CREATE TABLE plt1_e_p1 PARTITION OF plt1_e FOR VALUES IN ('0000', '0003', '0004', '0010');
CREATE TABLE plt1_e_p2 PARTITION OF plt1_e FOR VALUES IN ('0001', '0005', '0002', '0009');
CREATE TABLE plt1_e_p3 PARTITION OF plt1_e FOR VALUES IN ('0006', '0007', '0008', '0011');
INSERT INTO plt1_e SELECT i, i, 'A' || to_char(i/50, 'FM0000') FROM generate_series(0, 599, 2) i;
ANALYZE plt1_e;
-- test partition matching with N-way join
EXPLAIN (COSTS OFF)
SELECT avg(t1.a), avg(t2.b), avg(t3.a + t3.b), t1.c, t2.c, t3.c FROM plt1 t1, plt2 t2, plt1_e t3 WHERE t1.c = t2.c AND ltrim(t3.c, 'A') = t1.c GROUP BY t1.c, t2.c, t3.c ORDER BY t1.c, t2.c, t3.c;
SELECT avg(t1.a), avg(t2.b), avg(t3.a + t3.b), t1.c, t2.c, t3.c FROM plt1 t1, plt2 t2, plt1_e t3 WHERE t1.c = t2.c AND ltrim(t3.c, 'A') = t1.c GROUP BY t1.c, t2.c, t3.c ORDER BY t1.c, t2.c, t3.c;
Hash Cond: ((t1.a = t2.b) AND ((t1.c)::text = (t2.c)::text))
-> Seq Scan on prt1_l_p1 t1
-> Hash
-> Seq Scan on prt2_l_p1 t2
Filter: (a = 0)
-> Hash Right Join
Hash Cond: ((t1_1.a = t2_1.b) AND ((t1_1.c)::text = (t2_1.c)::text))
-> Seq Scan on prt1_l_p2_p1 t1_1
-> Hash
-> Seq Scan on prt2_l_p2_p1 t2_1
Filter: (a = 0)
-> Hash Right Join
Hash Cond: ((t1_2.a = t2_2.b) AND ((t1_2.c)::text = (t2_2.c)::text))
-> Seq Scan on prt1_l_p2_p2 t1_2
-> Hash
-> Seq Scan on prt2_l_p2_p2 t2_2
Filter: (a = 0)
-> Hash Right Join
Hash Cond: ((t1_3.a = t2_3.b) AND ((t1_3.c)::text = (t2_3.c)::text))
-> Append
-> Seq Scan on prt1_l_p3_p1 t1_3
-> Seq Scan on prt1_l_p3_p2 t1_4
-> Hash
-> Append
-> Seq Scan on prt2_l_p3_p1 t2_3
Filter: (a = 0)
(31 rows)
SELECT t1.a, t1.c, t2.b, t2.c FROM prt1_l t1 RIGHT JOIN prt2_l t2 ON t1.a = t2.b AND t1.c = t2.c WHERE t2.a = 0 ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
0 | 0000 | 0 | 0000
150 | 0002 | 150 | 0002
300 | 0000 | 300 | 0000
450 | 0002 | 450 | 0002
| | 75 | 0003
| | 225 | 0001
| | 375 | 0003
| | 525 | 0001
(8 rows)
-- full join
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1_l WHERE prt1_l.b = 0) t1 FULL JOIN (SELECT * FROM prt2_l WHERE prt2_l.a = 0) t2 ON (t1.a = t2.b AND t1.c = t2.c) ORDER BY t1.a, t2.b;
Hash Cond: ((prt1_l_p1.a = prt2_l_p1.b) AND ((prt1_l_p1.c)::text = (prt2_l_p1.c)::text))
-> Seq Scan on prt1_l_p1
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_l_p1
Filter: (a = 0)
-> Hash Full Join
Hash Cond: ((prt1_l_p2_p1.a = prt2_l_p2_p1.b) AND ((prt1_l_p2_p1.c)::text = (prt2_l_p2_p1.c)::text))
-> Seq Scan on prt1_l_p2_p1
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_l_p2_p1
Filter: (a = 0)
-> Hash Full Join
Hash Cond: ((prt1_l_p2_p2.a = prt2_l_p2_p2.b) AND ((prt1_l_p2_p2.c)::text = (prt2_l_p2_p2.c)::text))
-> Seq Scan on prt1_l_p2_p2
Filter: (b = 0)
-> Hash
-> Seq Scan on prt2_l_p2_p2
Filter: (a = 0)
-> Hash Full Join
Hash Cond: ((prt1_l_p3_p1.a = prt2_l_p3_p1.b) AND ((prt1_l_p3_p1.c)::text = (prt2_l_p3_p1.c)::text))
-> Append
-> Seq Scan on prt1_l_p3_p1
Filter: (b = 0)
-> Hash
-> Append
-> Seq Scan on prt2_l_p3_p1
Filter: (a = 0)
(33 rows)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1_l WHERE prt1_l.b = 0) t1 FULL JOIN (SELECT * FROM prt2_l WHERE prt2_l.a = 0) t2 ON (t1.a = t2.b AND t1.c = t2.c) ORDER BY t1.a, t2.b;
a | c | b | c
-----+------+-----+------
0 | 0000 | 0 | 0000
50 | 0002 | |
100 | 0000 | |
150 | 0002 | 150 | 0002
200 | 0000 | |
250 | 0002 | |
300 | 0000 | 300 | 0000
350 | 0002 | |
400 | 0000 | |
450 | 0002 | 450 | 0002
500 | 0000 | |
550 | 0002 | |
| | 75 | 0003
| | 225 | 0001
| | 375 | 0003
| | 525 | 0001
(16 rows)
-- lateral partition-wise join
EXPLAIN (COSTS OFF)
SELECT * FROM prt1_l t1 LEFT JOIN LATERAL
(SELECT t2.a AS t2a, t2.c AS t2c, t2.b AS t2b, t3.b AS t3b, least(t1.a,t2.a,t3.b) FROM prt1_l t2 JOIN prt2_l t3 ON (t2.a = t3.b AND t2.c = t3.c)) ss
ON t1.a = ss.t2a AND t1.c = ss.t2c WHERE t1.b = 0 ORDER BY t1.a;
Hash Cond: ((t3.b = t2.a) AND ((t3.c)::text = (t2.c)::text))
-> Seq Scan on prt2_l_p1 t3
-> Hash
-> Seq Scan on prt1_l_p1 t2
Filter: ((t1.a = a) AND ((t1.c)::text = (c)::text))
-> Nested Loop Left Join
-> Seq Scan on prt1_l_p2_p1 t1_1
Filter: (b = 0)
-> Hash Join
Hash Cond: ((t3_1.b = t2_1.a) AND ((t3_1.c)::text = (t2_1.c)::text))
-> Seq Scan on prt2_l_p2_p1 t3_1
-> Hash
-> Seq Scan on prt1_l_p2_p1 t2_1
Filter: ((t1_1.a = a) AND ((t1_1.c)::text = (c)::text))
-> Nested Loop Left Join
-> Seq Scan on prt1_l_p2_p2 t1_2
Filter: (b = 0)
-> Hash Join
Hash Cond: ((t3_2.b = t2_2.a) AND ((t3_2.c)::text = (t2_2.c)::text))
-> Seq Scan on prt2_l_p2_p2 t3_2
-> Hash
-> Seq Scan on prt1_l_p2_p2 t2_2
Filter: ((t1_2.a = a) AND ((t1_2.c)::text = (c)::text))
-> Nested Loop Left Join
-> Append
-> Seq Scan on prt1_l_p3_p1 t1_3
Filter: (b = 0)
-> Hash Join
Hash Cond: ((t3_3.b = t2_3.a) AND ((t3_3.c)::text = (t2_3.c)::text))
-> Append
-> Seq Scan on prt2_l_p3_p1 t3_3
-> Seq Scan on prt2_l_p3_p2 t3_4
-> Hash
-> Append
-> Seq Scan on prt1_l_p3_p1 t2_3
Filter: ((t1_3.a = a) AND ((t1_3.c)::text = (c)::text))
-> Seq Scan on prt1_l_p3_p2 t2_4
Filter: ((t1_3.a = a) AND ((t1_3.c)::text = (c)::text))
(46 rows)
SELECT * FROM prt1_l t1 LEFT JOIN LATERAL
(SELECT t2.a AS t2a, t2.c AS t2c, t2.b AS t2b, t3.b AS t3b, least(t1.a,t2.a,t3.b) FROM prt1_l t2 JOIN prt2_l t3 ON (t2.a = t3.b AND t2.c = t3.c)) ss
ON t1.a = ss.t2a AND t1.c = ss.t2c WHERE t1.b = 0 ORDER BY t1.a;
a | b | c | t2a | t2c | t2b | t3b | least
-----+---+------+-----+------+-----+-----+-------
0 | 0 | 0000 | 0 | 0000 | 0 | 0 | 0
50 | 0 | 0002 | | | | |
100 | 0 | 0000 | | | | |
150 | 0 | 0002 | 150 | 0002 | 0 | 150 | 150
200 | 0 | 0000 | | | | |
250 | 0 | 0002 | | | | |
300 | 0 | 0000 | 300 | 0000 | 0 | 300 | 300
350 | 0 | 0002 | | | | |
400 | 0 | 0000 | | | | |
450 | 0 | 0002 | 450 | 0002 | 0 | 450 | 450
500 | 0 | 0000 | | | | |
550 | 0 | 0002 | | | | |
(12 rows)
-- join with one side empty
EXPLAIN (COSTS OFF)
SELECT t1.a, t1.c, t2.b, t2.c FROM (SELECT * FROM prt1_l WHERE a = 1 AND a = 2) t1 RIGHT JOIN prt2_l t2 ON t1.a = t2.b AND t1.b = t2.a AND t1.c = t2.c;