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Postgres FD Implementation
Commit 5b1f9ce1 authored by Robert Haas's avatar Robert Haas
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postgres_fdw: Don't push down certain full joins. 

If there's a filter condition on either side of a full outer join,
it is neither correct to attach it to the join's ON clause nor to
throw it into the toplevel WHERE clause.  Just don't push down the
join in that case.

To maximize the number of cases where we can still push down full
joins, push inner join conditions into the ON clause at the first
opportunity rather than postponing them to the top-level WHERE
clause.  This produces nicer SQL, anyway.

This bug was introduced in e4106b25.

Ashutosh Bapat, per report from Rajkumar Raghuwanshi.
parent cbabb70f
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contrib/postgres_fdw/expected/postgres_fdw.out
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...@@ -448,8 +448,8 @@ SELECT t1.c1, t2."C 1" FROM ft2 t1 LEFT JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1" ...@@ -448,8 +448,8 @@ SELECT t1.c1, t2."C 1" FROM ft2 t1 LEFT JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1"
-- foreign join so that the local table can be joined using merge join strategy. -- foreign join so that the local table can be joined using merge join strategy.
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1."C 1" FROM "S 1"."T 1" t1 left join ft1 t2 join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10; SELECT t1."C 1" FROM "S 1"."T 1" t1 left join ft1 t2 join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1."C 1" Output: t1."C 1"
-> Merge Right Join -> Merge Right Join
...@@ -458,7 +458,7 @@ EXPLAIN (COSTS false, VERBOSE) ...@@ -458,7 +458,7 @@ EXPLAIN (COSTS false, VERBOSE)
-> Foreign Scan -> Foreign Scan
Output: t3.c1 Output: t3.c1
Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3) Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3)
Remote SQL: SELECT r3."C 1" FROM ("S 1"."T 1" r2 INNER JOIN "S 1"."T 1" r3 ON (TRUE)) WHERE ((r2."C 1" = r3."C 1")) ORDER BY r2."C 1" ASC NULLS LAST Remote SQL: SELECT r3."C 1" FROM ("S 1"."T 1" r2 INNER JOIN "S 1"."T 1" r3 ON (((r2."C 1" = r3."C 1")))) ORDER BY r2."C 1" ASC NULLS LAST
-> Index Only Scan using t1_pkey on "S 1"."T 1" t1 -> Index Only Scan using t1_pkey on "S 1"."T 1" t1
Output: t1."C 1" Output: t1."C 1"
(11 rows) (11 rows)
...@@ -903,14 +903,14 @@ ANALYZE ft5; ...@@ -903,14 +903,14 @@ ANALYZE ft5;
-- join two tables -- join two tables
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3 Output: t1.c1, t2.c1, t1.c3
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1, t1.c3 Output: t1.c1, t2.c1, t1.c3
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST
(6 rows) (6 rows)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
...@@ -931,8 +931,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -931,8 +931,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-- join three tables -- join three tables
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t3 ON (t3.c1 = t1.c1) ORDER BY t1.c3, t1.c1 OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t3 ON (t3.c1 = t1.c1) ORDER BY t1.c3, t1.c1 OFFSET 10 LIMIT 10;
QUERY PLAN QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c2, t3.c3, t1.c3 Output: t1.c1, t2.c2, t3.c3, t1.c3
-> Sort -> Sort
...@@ -941,7 +941,7 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t ...@@ -941,7 +941,7 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c2, t3.c3, t1.c3 Output: t1.c1, t2.c2, t3.c3, t1.c3
Relations: ((public.ft1 t1) INNER JOIN (public.ft2 t2)) INNER JOIN (public.ft4 t3) Relations: ((public.ft1 t1) INNER JOIN (public.ft2 t2)) INNER JOIN (public.ft4 t3)
Remote SQL: SELECT r1."C 1", r1.c3, r2.c2, r4.c3 FROM (("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) INNER JOIN "S 1"."T 3" r4 ON (TRUE)) WHERE ((r1."C 1" = r4.c1)) AND ((r1."C 1" = r2."C 1")) Remote SQL: SELECT r1."C 1", r1.c3, r2.c2, r4.c3 FROM (("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) INNER JOIN "S 1"."T 3" r4 ON (((r1."C 1" = r4.c1))))
(9 rows) (9 rows)
SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t3 ON (t3.c1 = t1.c1) ORDER BY t1.c3, t1.c1 OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) JOIN ft4 t3 ON (t3.c1 = t1.c1) ORDER BY t1.c3, t1.c1 OFFSET 10 LIMIT 10;
...@@ -1144,6 +1144,68 @@ SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1. ...@@ -1144,6 +1144,68 @@ SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.
| 27 | 27
(10 rows) (10 rows)
-- full outer join with restrictions on the joining relations
EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM (SELECT c1 FROM ft4 WHERE c1 between 50 and 60) t1 FULL JOIN (SELECT c1 FROM ft5 WHERE c1 between 50 and 60) t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1;
QUERY PLAN
------------------------------------------------------------------------------------------------
Sort
Output: ft4.c1, ft5.c1
Sort Key: ft4.c1, ft5.c1
-> Hash Full Join
Output: ft4.c1, ft5.c1
Hash Cond: (ft4.c1 = ft5.c1)
-> Foreign Scan on public.ft4
Output: ft4.c1, ft4.c2, ft4.c3
Remote SQL: SELECT c1 FROM "S 1"."T 3" WHERE ((c1 >= 50)) AND ((c1 <= 60))
-> Hash
Output: ft5.c1
-> Foreign Scan on public.ft5
Output: ft5.c1
Remote SQL: SELECT c1 FROM "S 1"."T 4" WHERE ((c1 >= 50)) AND ((c1 <= 60))
(14 rows)
SELECT t1.c1, t2.c1 FROM (SELECT c1 FROM ft4 WHERE c1 between 50 and 60) t1 FULL JOIN (SELECT c1 FROM ft5 WHERE c1 between 50 and 60) t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1;
c1 | c1
----+----
50 |
52 |
54 | 54
56 |
58 |
60 | 60
| 51
| 57
(8 rows)
-- full outer join + inner join
EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1, t3.c1 FROM ft4 t1 INNER JOIN ft5 t2 ON (t1.c1 = t2.c1 + 1 and t1.c1 between 50 and 60) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) ORDER BY t1.c1, t2.c1, t3.c1 LIMIT 10;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit
Output: t1.c1, t2.c1, t3.c1
-> Foreign Scan
Output: t1.c1, t2.c1, t3.c1
Relations: ((public.ft4 t1) INNER JOIN (public.ft5 t2)) FULL JOIN (public.ft4 t3)
Remote SQL: SELECT r1.c1, r2.c1, r4.c1 FROM (("S 1"."T 3" r1 INNER JOIN "S 1"."T 4" r2 ON (((r1.c1 = (r2.c1 + 1))) AND ((r1.c1 >= 50)) AND ((r1.c1 <= 60)))) FULL JOIN "S 1"."T 3" r4 ON (((r2.c1 = r4.c1)))) ORDER BY r1.c1 ASC NULLS LAST, r2.c1 ASC NULLS LAST, r4.c1 ASC NULLS LAST
(6 rows)
SELECT t1.c1, t2.c1, t3.c1 FROM ft4 t1 INNER JOIN ft5 t2 ON (t1.c1 = t2.c1 + 1 and t1.c1 between 50 and 60) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) ORDER BY t1.c1, t2.c1, t3.c1 LIMIT 10;
c1 | c1 | c1
----+----+----
52 | 51 |
58 | 57 |
| | 2
| | 4
| | 6
| | 8
| | 10
| | 12
| | 14
| | 16
(10 rows)
-- full outer join three tables -- full outer join three tables
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
...@@ -1315,14 +1377,14 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT ...@@ -1315,14 +1377,14 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT
-- left outer join + right outer join -- left outer join + right outer join
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c2, t3.c3 Output: t1.c1, t2.c2, t3.c3
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c2, t3.c3 Output: t1.c1, t2.c2, t3.c3
Relations: (public.ft4 t3) LEFT JOIN ((public.ft2 t1) INNER JOIN (public.ft2 t2)) Relations: (public.ft4 t3) LEFT JOIN ((public.ft2 t1) INNER JOIN (public.ft2 t2))
Remote SQL: SELECT r4.c3, r1."C 1", r2.c2 FROM ("S 1"."T 3" r4 LEFT JOIN ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) ON (((r2."C 1" = r4.c1)) AND ((r1."C 1" = r2."C 1")))) Remote SQL: SELECT r4.c3, r1."C 1", r2.c2 FROM ("S 1"."T 3" r4 LEFT JOIN ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ON (((r2."C 1" = r4.c1))))
(6 rows) (6 rows)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
...@@ -1375,8 +1437,8 @@ SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) WHERE (t1.c1 ...@@ -1375,8 +1437,8 @@ SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) WHERE (t1.c1
-- tests whole-row reference for row marks -- tests whole-row reference for row marks
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE OF t1; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE OF t1;
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
-> LockRows -> LockRows
...@@ -1384,7 +1446,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1384,7 +1446,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR UPDATE OF r1 Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR UPDATE OF r1
-> Merge Join -> Merge Join
Output: t1.c1, t1.c3, t1.*, t2.c1, t2.* Output: t1.c1, t1.c3, t1.*, t2.c1, t2.*
Merge Cond: (t1.c1 = t2.c1) Merge Cond: (t1.c1 = t2.c1)
...@@ -1419,8 +1481,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1419,8 +1481,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR UPDATE;
QUERY PLAN QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
-> LockRows -> LockRows
...@@ -1428,7 +1490,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1428,7 +1490,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR UPDATE OF r1 FOR UPDATE OF r2 Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR UPDATE OF r1 FOR UPDATE OF r2
-> Merge Join -> Merge Join
Output: t1.c1, t1.c3, t1.*, t2.c1, t2.* Output: t1.c1, t1.c3, t1.*, t2.c1, t2.*
Merge Cond: (t1.c1 = t2.c1) Merge Cond: (t1.c1 = t2.c1)
...@@ -1464,8 +1526,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1464,8 +1526,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-- join two tables with FOR SHARE clause -- join two tables with FOR SHARE clause
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE OF t1; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE OF t1;
QUERY PLAN QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
-> LockRows -> LockRows
...@@ -1473,7 +1535,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1473,7 +1535,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR SHARE OF r1 Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR SHARE OF r1
-> Merge Join -> Merge Join
Output: t1.c1, t1.c3, t1.*, t2.c1, t2.* Output: t1.c1, t1.c3, t1.*, t2.c1, t2.*
Merge Cond: (t1.c1 = t2.c1) Merge Cond: (t1.c1 = t2.c1)
...@@ -1508,8 +1570,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1508,8 +1570,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10 FOR SHARE;
QUERY PLAN QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
-> LockRows -> LockRows
...@@ -1517,7 +1579,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1517,7 +1579,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1, t1.c3, t1.*, t2.* Output: t1.c1, t2.c1, t1.c3, t1.*, t2.*
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR SHARE OF r1 FOR SHARE OF r2 Remote SQL: SELECT r1."C 1", r1.c3, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r2."C 1", CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST FOR SHARE OF r1 FOR SHARE OF r2
-> Merge Join -> Merge Join
Output: t1.c1, t1.c3, t1.*, t2.c1, t2.* Output: t1.c1, t1.c3, t1.*, t2.c1, t2.*
Merge Cond: (t1.c1 = t2.c1) Merge Cond: (t1.c1 = t2.c1)
...@@ -1553,15 +1615,15 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t ...@@ -1553,15 +1615,15 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t
-- join in CTE -- join in CTE
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
WITH t (c1_1, c1_3, c2_1) AS (SELECT t1.c1, t1.c3, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) SELECT c1_1, c2_1 FROM t ORDER BY c1_3, c1_1 OFFSET 100 LIMIT 10; WITH t (c1_1, c1_3, c2_1) AS (SELECT t1.c1, t1.c3, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) SELECT c1_1, c2_1 FROM t ORDER BY c1_3, c1_1 OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t.c1_1, t.c2_1, t.c1_3 Output: t.c1_1, t.c2_1, t.c1_3
CTE t CTE t
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t1.c3, t2.c1 Output: t1.c1, t1.c3, t2.c1
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
-> Sort -> Sort
Output: t.c1_1, t.c2_1, t.c1_3 Output: t.c1_1, t.c2_1, t.c1_3
Sort Key: t.c1_3, t.c1_1 Sort Key: t.c1_3, t.c1_1
...@@ -1587,14 +1649,14 @@ WITH t (c1_1, c1_3, c2_1) AS (SELECT t1.c1, t1.c3, t2.c1 FROM ft1 t1 JOIN ft2 t2 ...@@ -1587,14 +1649,14 @@ WITH t (c1_1, c1_3, c2_1) AS (SELECT t1.c1, t1.c3, t2.c1 FROM ft1 t1 JOIN ft2 t2
-- ctid with whole-row reference -- ctid with whole-row reference
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.ctid, t1, t2, t1.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10; SELECT t1.ctid, t1, t2, t1.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.ctid, t1.*, t2.*, t1.c1, t1.c3 Output: t1.ctid, t1.*, t2.*, t1.c1, t1.c3
-> Foreign Scan -> Foreign Scan
Output: t1.ctid, t1.*, t2.*, t1.c1, t1.c3 Output: t1.ctid, t1.*, t2.*, t1.c1, t1.c3
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1.ctid, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r1."C 1", r1.c3, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST Remote SQL: SELECT r1.ctid, CASE WHEN r1.* IS NOT NULL THEN ROW(r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c7, r1.c8) END, r1."C 1", r1.c3, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")))) ORDER BY r1.c3 ASC NULLS LAST, r1."C 1" ASC NULLS LAST
(6 rows) (6 rows)
-- SEMI JOIN, not pushed down -- SEMI JOIN, not pushed down
...@@ -1817,8 +1879,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 ...@@ -1817,8 +1879,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8
-- into one of the joining sides. -- into one of the joining sides.
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.c8 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.c8 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, t2.c1, t1.c3 Output: t1.c1, t2.c1, t1.c3
-> Sort -> Sort
...@@ -1828,7 +1890,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2. ...@@ -1828,7 +1890,7 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.
Output: t1.c1, t2.c1, t1.c3 Output: t1.c1, t2.c1, t1.c3
Filter: (t1.c8 = t2.c8) Filter: (t1.c8 = t2.c8)
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1", r1.c8, r2.c8 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) Remote SQL: SELECT r1."C 1", r1.c3, r2."C 1", r1.c8, r2.c8 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
(10 rows) (10 rows)
SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.c8 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.c8 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
...@@ -1849,8 +1911,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2. ...@@ -1849,8 +1911,8 @@ SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = t2.
-- Aggregate after UNION, for testing setrefs -- Aggregate after UNION, for testing setrefs
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) UNION SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) AS t (t1c1, t2c1) GROUP BY t1c1 ORDER BY t1c1 OFFSET 100 LIMIT 10; SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) UNION SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) AS t (t1c1, t2c1) GROUP BY t1c1 ORDER BY t1c1 OFFSET 100 LIMIT 10;
QUERY PLAN QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, (avg((t1.c1 + t2.c1))) Output: t1.c1, (avg((t1.c1 + t2.c1)))
-> Sort -> Sort
...@@ -1866,11 +1928,11 @@ SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ...@@ -1866,11 +1928,11 @@ SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2
-> Foreign Scan -> Foreign Scan
Output: t1.c1, t2.c1 Output: t1.c1, t2.c1
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
-> Foreign Scan -> Foreign Scan
Output: t1_1.c1, t2_1.c1 Output: t1_1.c1, t2_1.c1
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1"))))
(20 rows) (20 rows)
SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) UNION SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) AS t (t1c1, t2c1) GROUP BY t1c1 ORDER BY t1c1 OFFSET 100 LIMIT 10; SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) UNION SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1)) AS t (t1c1, t2c1) GROUP BY t1c1 ORDER BY t1c1 OFFSET 100 LIMIT 10;
...@@ -1891,8 +1953,8 @@ SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2 ...@@ -1891,8 +1953,8 @@ SELECT t1c1, avg(t1c1 + t2c1) FROM (SELECT t1.c1, t2.c1 FROM ft1 t1 JOIN ft2 t2
-- join with lateral reference -- join with lateral reference
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ft1 t2, ft2 t3 WHERE t2.c1 = t3.c1 AND t2.c2 = t1.c2) q ORDER BY t1."C 1" OFFSET 10 LIMIT 10; SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ft1 t2, ft2 t3 WHERE t2.c1 = t3.c1 AND t2.c2 = t1.c2) q ORDER BY t1."C 1" OFFSET 10 LIMIT 10;
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1."C 1" Output: t1."C 1"
-> Nested Loop -> Nested Loop
...@@ -1905,7 +1967,7 @@ SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ...@@ -1905,7 +1967,7 @@ SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM
-> Foreign Scan -> Foreign Scan
Output: t2.c1, t3.c1 Output: t2.c1, t3.c1
Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3) Relations: (public.ft1 t2) INNER JOIN (public.ft2 t3)
Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1."C 1" = r2."C 1")) AND ((r1.c2 = $1::integer)) Remote SQL: SELECT r1."C 1", r2."C 1" FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1."C 1" = r2."C 1")) AND ((r1.c2 = $1::integer))))
(13 rows) (13 rows)
SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ft1 t2, ft2 t3 WHERE t2.c1 = t3.c1 AND t2.c2 = t1.c2) q ORDER BY t1."C 1" OFFSET 10 LIMIT 10; SELECT t1."C 1" FROM "S 1"."T 1" t1, LATERAL (SELECT DISTINCT t2.c1, t3.c1 FROM ft1 t2, ft2 t3 WHERE t2.c1 = t3.c1 AND t2.c2 = t1.c2) q ORDER BY t1."C 1" OFFSET 10 LIMIT 10;
...@@ -1996,14 +2058,14 @@ CREATE USER MAPPING FOR PUBLIC SERVER loopback; ...@@ -1996,14 +2058,14 @@ CREATE USER MAPPING FOR PUBLIC SERVER loopback;
-- joining sides, join pushed down, no result expected. -- joining sides, join pushed down, no result expected.
PREPARE join_stmt AS SELECT t1.c1, t2.c1 FROM ft5 t1 JOIN v_ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10; PREPARE join_stmt AS SELECT t1.c1, t2.c1 FROM ft5 t1 JOIN v_ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt; EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt;
QUERY PLAN QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------------------
Limit Limit
Output: t1.c1, ft5.c1 Output: t1.c1, ft5.c1
-> Foreign Scan -> Foreign Scan
Output: t1.c1, ft5.c1 Output: t1.c1, ft5.c1
Relations: (public.ft5 t1) INNER JOIN (public.ft5) Relations: (public.ft5 t1) INNER JOIN (public.ft5)
Remote SQL: SELECT r1.c1, r6.c1 FROM ("S 1"."T 4" r1 INNER JOIN "S 1"."T 4" r6 ON (TRUE)) WHERE ((r1.c1 = r6.c1)) ORDER BY r1.c1 ASC NULLS LAST Remote SQL: SELECT r1.c1, r6.c1 FROM ("S 1"."T 4" r1 INNER JOIN "S 1"."T 4" r6 ON (((r1.c1 = r6.c1)))) ORDER BY r1.c1 ASC NULLS LAST
(6 rows) (6 rows)
EXECUTE join_stmt; EXECUTE join_stmt;
...@@ -2081,12 +2143,12 @@ DROP USER MAPPING FOR PUBLIC SERVER loopback; ...@@ -2081,12 +2143,12 @@ DROP USER MAPPING FOR PUBLIC SERVER loopback;
-- simple join -- simple join
PREPARE st1(int, int) AS SELECT t1.c3, t2.c3 FROM ft1 t1, ft2 t2 WHERE t1.c1 = $1 AND t2.c1 = $2; PREPARE st1(int, int) AS SELECT t1.c3, t2.c3 FROM ft1 t1, ft2 t2 WHERE t1.c1 = $1 AND t2.c1 = $2;
EXPLAIN (VERBOSE, COSTS false) EXECUTE st1(1, 2); EXPLAIN (VERBOSE, COSTS false) EXECUTE st1(1, 2);
QUERY PLAN QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------
Foreign Scan Foreign Scan
Output: t1.c3, t2.c3 Output: t1.c3, t2.c3
Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2) Relations: (public.ft1 t1) INNER JOIN (public.ft2 t2)
Remote SQL: SELECT r1.c3, r2.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r2."C 1" = 2)) AND ((r1."C 1" = 1)) Remote SQL: SELECT r1.c3, r2.c3 FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r2."C 1" = 2)) AND ((r1."C 1" = 1))))
(4 rows) (4 rows)
EXECUTE st1(1, 1); EXECUTE st1(1, 1);
...@@ -2692,14 +2754,14 @@ UPDATE ft2 SET c2 = c2 + 400, c3 = c3 || '_update7' WHERE c1 % 10 = 7 RETURNING ...@@ -2692,14 +2754,14 @@ UPDATE ft2 SET c2 = c2 + 400, c3 = c3 || '_update7' WHERE c1 % 10 = 7 RETURNING
EXPLAIN (verbose, costs off) EXPLAIN (verbose, costs off)
UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9', c7 = DEFAULT UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9', c7 = DEFAULT
FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9; -- can't be pushed down FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9; -- can't be pushed down
QUERY PLAN QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Update on public.ft2 Update on public.ft2
Remote SQL: UPDATE "S 1"."T 1" SET c2 = $2, c3 = $3, c7 = $4 WHERE ctid = $1 Remote SQL: UPDATE "S 1"."T 1" SET c2 = $2, c3 = $3, c7 = $4 WHERE ctid = $1
-> Foreign Scan -> Foreign Scan
Output: ft2.c1, (ft2.c2 + 500), NULL::integer, (ft2.c3 || '_update9'::text), ft2.c4, ft2.c5, ft2.c6, 'ft2 '::character(10), ft2.c8, ft2.ctid, ft1.* Output: ft2.c1, (ft2.c2 + 500), NULL::integer, (ft2.c3 || '_update9'::text), ft2.c4, ft2.c5, ft2.c6, 'ft2 '::character(10), ft2.c8, ft2.ctid, ft1.*
Relations: (public.ft2) INNER JOIN (public.ft1) Relations: (public.ft2) INNER JOIN (public.ft1)
Remote SQL: SELECT r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c8, r1.ctid, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1.c2 = r2."C 1")) AND (((r2."C 1" % 10) = 9)) FOR UPDATE OF r1 Remote SQL: SELECT r1."C 1", r1.c2, r1.c3, r1.c4, r1.c5, r1.c6, r1.c8, r1.ctid, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1.c2 = r2."C 1")) AND (((r2."C 1" % 10) = 9)))) FOR UPDATE OF r1
-> Hash Join -> Hash Join
Output: ft2.c1, ft2.c2, ft2.c3, ft2.c4, ft2.c5, ft2.c6, ft2.c8, ft2.ctid, ft1.* Output: ft2.c1, ft2.c2, ft2.c3, ft2.c4, ft2.c5, ft2.c6, ft2.c8, ft2.ctid, ft1.*
Hash Cond: (ft2.c2 = ft1.c1) Hash Cond: (ft2.c2 = ft1.c1)
...@@ -2835,14 +2897,14 @@ DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING c1, c4; ...@@ -2835,14 +2897,14 @@ DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING c1, c4;
EXPLAIN (verbose, costs off) EXPLAIN (verbose, costs off)
DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2; -- can't be pushed down DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2; -- can't be pushed down
QUERY PLAN QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Delete on public.ft2 Delete on public.ft2
Remote SQL: DELETE FROM "S 1"."T 1" WHERE ctid = $1 Remote SQL: DELETE FROM "S 1"."T 1" WHERE ctid = $1
-> Foreign Scan -> Foreign Scan
Output: ft2.ctid, ft1.* Output: ft2.ctid, ft1.*
Relations: (public.ft2) INNER JOIN (public.ft1) Relations: (public.ft2) INNER JOIN (public.ft1)
Remote SQL: SELECT r1.ctid, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (TRUE)) WHERE ((r1.c2 = r2."C 1")) AND (((r2."C 1" % 10) = 2)) FOR UPDATE OF r1 Remote SQL: SELECT r1.ctid, CASE WHEN r2.* IS NOT NULL THEN ROW(r2."C 1", r2.c2, r2.c3, r2.c4, r2.c5, r2.c6, r2.c7, r2.c8) END FROM ("S 1"."T 1" r1 INNER JOIN "S 1"."T 1" r2 ON (((r1.c2 = r2."C 1")) AND (((r2."C 1" % 10) = 2)))) FOR UPDATE OF r1
-> Hash Join -> Hash Join
Output: ft2.ctid, ft1.* Output: ft2.ctid, ft1.*
Hash Cond: (ft2.c2 = ft1.c1) Hash Cond: (ft2.c2 = ft1.c1)
......
contrib/postgres_fdw/postgres_fdw.c
View file @ 5b1f9ce1
...@@ -3998,54 +3998,23 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, ...@@ -3998,54 +3998,23 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype,
fpinfo->innerrel = innerrel; fpinfo->innerrel = innerrel;
fpinfo->jointype = jointype; fpinfo->jointype = jointype;
/*
* If user is willing to estimate cost for a scan of either of the joining
* relations using EXPLAIN, he intends to estimate scans on that relation
* more accurately. Then, it makes sense to estimate the cost the join
* with that relation more accurately using EXPLAIN.
*/
fpinfo->use_remote_estimate = fpinfo_o->use_remote_estimate ||
fpinfo_i->use_remote_estimate;
/*
* Since both the joining relations come from the same server, the server
* level options should have same value for both the relations. Pick from
* any side.
*/
fpinfo->fdw_startup_cost = fpinfo_o->fdw_startup_cost;
fpinfo->fdw_tuple_cost = fpinfo_o->fdw_tuple_cost;
/*
* Set cached relation costs to some negative value, so that we can detect
* when they are set to some sensible costs, during one (usually the
* first) of the calls to estimate_path_cost_size().
*/
fpinfo->rel_startup_cost = -1;
fpinfo->rel_total_cost = -1;
/* Mark that this join can be pushed down safely */
fpinfo->pushdown_safe = true;
/*
* Set fetch size to maximum of the joining sides, since we are expecting
* the rows returned by the join to be proportional to the relation sizes.
*/
if (fpinfo_o->fetch_size > fpinfo_i->fetch_size)
fpinfo->fetch_size = fpinfo_o->fetch_size;
else
fpinfo->fetch_size = fpinfo_i->fetch_size;
/* /*
* Pull the other remote conditions from the joining relations into join * Pull the other remote conditions from the joining relations into join
* clauses or other remote clauses (remote_conds) of this relation. This * clauses or other remote clauses (remote_conds) of this relation wherever
* avoids building subqueries at every join step. * possible. This avoids building subqueries at every join step, which is
* not currently supported by the deparser logic.
* *
* For an inner join, clauses from both the relations are added to the * For an inner join, clauses from both the relations are added to the
* other remote clauses. For an OUTER join, the clauses from the outer * other remote clauses. For LEFT and RIGHT OUTER join, the clauses from the
* side are added to remote_conds since those can be evaluated after the * outer side are added to remote_conds since those can be evaluated after
* join is evaluated. The clauses from inner side are added to the * the join is evaluated. The clauses from inner side are added to the
* joinclauses, since they need to evaluated while constructing the join. * joinclauses, since they need to evaluated while constructing the join.
* *
* For a FULL OUTER JOIN, the other clauses from either relation can not be
* added to the joinclauses or remote_conds, since each relation acts as an
* outer relation for the other. Consider such full outer join as
* unshippable because of the reasons mentioned above in this comment.
*
* The joining sides can not have local conditions, thus no need to test * The joining sides can not have local conditions, thus no need to test
* shippability of the clauses being pulled up. * shippability of the clauses being pulled up.
*/ */
...@@ -4073,10 +4042,8 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, ...@@ -4073,10 +4042,8 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype,
break; break;
case JOIN_FULL: case JOIN_FULL:
fpinfo->joinclauses = list_concat(fpinfo->joinclauses, if (fpinfo_i->remote_conds || fpinfo_o->remote_conds)
list_copy(fpinfo_i->remote_conds)); return false;
fpinfo->joinclauses = list_concat(fpinfo->joinclauses,
list_copy(fpinfo_o->remote_conds));
break; break;
default: default:
...@@ -4084,6 +4051,55 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, ...@@ -4084,6 +4051,55 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype,
elog(ERROR, "unsupported join type %d", jointype); elog(ERROR, "unsupported join type %d", jointype);
} }
/*
* For an inner join, as explained above all restrictions can be treated
* alike. Treating the pushed down conditions as join conditions allows a
* top level full outer join to be deparsed without requiring subqueries.
*/
if (jointype == JOIN_INNER)
{
Assert(!fpinfo->joinclauses);
fpinfo->joinclauses = fpinfo->remote_conds;
fpinfo->remote_conds = NIL;
}
/* Mark that this join can be pushed down safely */
fpinfo->pushdown_safe = true;
/*
* If user is willing to estimate cost for a scan of either of the joining
* relations using EXPLAIN, he intends to estimate scans on that relation
* more accurately. Then, it makes sense to estimate the cost the join
* with that relation more accurately using EXPLAIN.
*/
fpinfo->use_remote_estimate = fpinfo_o->use_remote_estimate ||
fpinfo_i->use_remote_estimate;
/*
* Since both the joining relations come from the same server, the server
* level options should have same value for both the relations. Pick from
* any side.
*/
fpinfo->fdw_startup_cost = fpinfo_o->fdw_startup_cost;
fpinfo->fdw_tuple_cost = fpinfo_o->fdw_tuple_cost;
/*
* Set cached relation costs to some negative value, so that we can detect
* when they are set to some sensible costs, during one (usually the
* first) of the calls to estimate_path_cost_size().
*/
fpinfo->rel_startup_cost = -1;
fpinfo->rel_total_cost = -1;
/*
* Set fetch size to maximum of the joining sides, since we are expecting
* the rows returned by the join to be proportional to the relation sizes.
*/
if (fpinfo_o->fetch_size > fpinfo_i->fetch_size)
fpinfo->fetch_size = fpinfo_o->fetch_size;
else
fpinfo->fetch_size = fpinfo_i->fetch_size;
/* /*
* Set the string describing this join relation to be used in EXPLAIN * Set the string describing this join relation to be used in EXPLAIN
* output of corresponding ForeignScan. * output of corresponding ForeignScan.
......
contrib/postgres_fdw/sql/postgres_fdw.sql
View file @ 5b1f9ce1
...@@ -372,6 +372,14 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGH ...@@ -372,6 +372,14 @@ SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGH
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 45 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 45 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 45 LIMIT 10; SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 45 LIMIT 10;
-- full outer join with restrictions on the joining relations
EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1 FROM (SELECT c1 FROM ft4 WHERE c1 between 50 and 60) t1 FULL JOIN (SELECT c1 FROM ft5 WHERE c1 between 50 and 60) t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1;
SELECT t1.c1, t2.c1 FROM (SELECT c1 FROM ft4 WHERE c1 between 50 and 60) t1 FULL JOIN (SELECT c1 FROM ft5 WHERE c1 between 50 and 60) t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1;
-- full outer join + inner join
EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c1, t3.c1 FROM ft4 t1 INNER JOIN ft5 t2 ON (t1.c1 = t2.c1 + 1 and t1.c1 between 50 and 60) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) ORDER BY t1.c1, t2.c1, t3.c1 LIMIT 10;
SELECT t1.c1, t2.c1, t3.c1 FROM ft4 t1 INNER JOIN ft5 t2 ON (t1.c1 = t2.c1 + 1 and t1.c1 between 50 and 60) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) ORDER BY t1.c1, t2.c1, t3.c1 LIMIT 10;
-- full outer join three tables -- full outer join three tables
EXPLAIN (COSTS false, VERBOSE) EXPLAIN (COSTS false, VERBOSE)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10; SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
......
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