-- simple queries
-- ===================================================================
-- single table without alias
-EXPLAIN (COSTS false) SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
+EXPLAIN (COSTS OFF) SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------
Limit
(10 rows)
-- single table with alias - also test that tableoid sort is not pushed to remote side
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1, t1.tableoid OFFSET 100 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1, t1.tableoid OFFSET 100 LIMIT 10;
QUERY PLAN
-------------------------------------------------------------------------------------
Limit
(10 rows)
-- whole-row reference
-EXPLAIN (VERBOSE, COSTS false) SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------
Limit
(0 rows)
-- with WHERE clause
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
(1 row)
-- with FOR UPDATE/SHARE
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------
LockRows
101 | 1 | 00101 | Fri Jan 02 00:00:00 1970 PST | Fri Jan 02 00:00:00 1970 | 1 | 1 | foo
(1 row)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------
LockRows
SET enable_hashjoin TO false;
SET enable_nestloop TO false;
-- inner join; expressions in the clauses appear in the equivalence class list
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2."C 1" FROM ft2 t1 JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------
-- outer join; expressions in the clauses do not appear in equivalence class
-- list but no output change as compared to the previous query
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2."C 1" FROM ft2 t1 LEFT JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------
-- A join between local table and foreign join. ORDER BY clause is added to the
-- foreign join so that the local table can be joined using merge join strategy.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
---------------------------------------------------------------------------------------------------------------------------------------------------------
-- Test similar to above, except that the full join prevents any equivalence
-- classes from being merged. This produces single relation equivalence classes
-- included in join restrictions.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 left join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- Test similar to above with all full outer joins
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 full join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- ===================================================================
-- WHERE with remotely-executable conditions
-- ===================================================================
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 1; -- Var, OpExpr(b), Const
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 1; -- Var, OpExpr(b), Const
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 100 AND t1.c2 = 0; -- BoolExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 100 AND t1.c2 = 0; -- BoolExpr
QUERY PLAN
--------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 100)) AND ((c2 = 0))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NULL; -- NullTest
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 IS NULL; -- NullTest
QUERY PLAN
-------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" IS NULL))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NOT NULL; -- NullTest
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 IS NOT NULL; -- NullTest
QUERY PLAN
-----------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" IS NOT NULL))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE round(abs(c1), 0) = 1; -- FuncExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE round(abs(c1), 0) = 1; -- FuncExpr
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((round(abs("C 1"), 0) = 1::numeric))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = -c1; -- OpExpr(l)
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = -c1; -- OpExpr(l)
QUERY PLAN
-----------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = (- "C 1")))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE 1 = c1!; -- OpExpr(r)
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE 1 = c1!; -- OpExpr(r)
QUERY PLAN
----------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((1::numeric = ("C 1" !)))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE (c1 IS NOT NULL) IS DISTINCT FROM (c1 IS NOT NULL); -- DistinctExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE (c1 IS NOT NULL) IS DISTINCT FROM (c1 IS NOT NULL); -- DistinctExpr
QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((("C 1" IS NOT NULL) IS DISTINCT FROM ("C 1" IS NOT NULL)))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = ANY(ARRAY[c2, 1, c1 + 0]); -- ScalarArrayOpExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = ANY(ARRAY[c2, 1, c1 + 0]); -- ScalarArrayOpExpr
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = ANY (ARRAY[c2, 1, ("C 1" + 0)])))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = (ARRAY[c1,c2,3])[1]; -- ArrayRef
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = (ARRAY[c1,c2,3])[1]; -- ArrayRef
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = ((ARRAY["C 1", c2, 3])[1])))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c6 = E'foo''s\\bar'; -- check special chars
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c6 = E'foo''s\\bar'; -- check special chars
QUERY PLAN
-------------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE ((c6 = E'foo''s\\bar'::text))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c8 = 'foo'; -- can't be sent to remote
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c8 = 'foo'; -- can't be sent to remote
QUERY PLAN
-------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
(4 rows)
-- parameterized remote path for foreign table
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM "S 1"."T 1" a, ft2 b WHERE a."C 1" = 47 AND b.c1 = a.c2;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------
(1 row)
-- check both safe and unsafe join conditions
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 a, ft2 b
WHERE a.c2 = 6 AND b.c1 = a.c1 AND a.c8 = 'foo' AND b.c7 = upper(a.c7);
QUERY PLAN
-- we should not push order by clause with volatile expressions or unsafe
-- collations
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 ORDER BY ft2.c1, random();
QUERY PLAN
-------------------------------------------------------------------------------
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1"
(6 rows)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 ORDER BY ft2.c1, ft2.c3 collate "C";
QUERY PLAN
-------------------------------------------------------------------------------
COMMUTATOR = ===
);
-- built-in operators and functions can be shipped for remote execution
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = abs(t1.c2);
QUERY PLAN
--------------------------------------------------------------------------
9
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = t1.c2;
QUERY PLAN
---------------------------------------------------------------------
(1 row)
-- by default, user-defined ones cannot
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
QUERY PLAN
-----------------------------------------------------------
9
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
QUERY PLAN
-----------------------------------------------------------
ALTER EXTENSION postgres_fdw ADD OPERATOR === (int, int);
ALTER SERVER loopback OPTIONS (ADD extensions 'postgres_fdw');
-- ... now they can be shipped
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
QUERY PLAN
----------------------------------------------------------------------------------------------
9
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
QUERY PLAN
----------------------------------------------------------------------------------------
ANALYZE ft4;
ANALYZE ft5;
-- join two tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- left outer join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- left outer join + placement of clauses.
-- clauses within the nullable side are not pulled up, but top level clause on
-- non-nullable side is pushed into non-nullable side
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1) WHERE t1.c1 < 10;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------------------------------------
-- clauses within the nullable side are not pulled up, but the top level clause
-- on nullable side is not pushed down into nullable side
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1)
WHERE (t2.c1 < 10 OR t2.c1 IS NULL) AND t1.c1 < 10;
QUERY PLAN
(4 rows)
-- right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft5 t1 RIGHT JOIN ft4 t2 ON (t1.c1 = t2.c1) ORDER BY t2.c1, t1.c1 OFFSET 10 LIMIT 10;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- right outer join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
QUERY PLAN
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join with restrictions on the joining relations
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
------------------------------------------------------------------------------------------------
(8 rows)
-- full outer join + inner join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join + right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- right outer join + full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join + left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- left outer join + full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- right outer join + left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- left outer join + right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- full outer join + WHERE clause, only matched rows
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) WHERE (t1.c1 = t2.c1 OR t1.c1 IS NULL) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- join two tables with FOR UPDATE clause
-- tests whole-row reference for row marks
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
110 | 110
(10 rows)
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- join two tables with FOR SHARE clause
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
110 | 110
(10 rows)
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- join in CTE
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- ctid with whole-row reference
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
(6 rows)
-- SEMI JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1 FROM ft1 t1 WHERE EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c1) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------------
(10 rows)
-- ANTI JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1 FROM ft1 t1 WHERE NOT EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c2) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------
(10 rows)
-- CROSS JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 CROSS JOIN ft2 t2 ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------
(10 rows)
-- different server, not pushed down. No result expected.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft5 t1 JOIN ft6 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------
-- unsafe join conditions (c8 has a UDT), not pushed down. Practically a CROSS
-- JOIN since c8 in both tables has same value.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c8 = t2.c8) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
-------------------------------------------------------------------------
(10 rows)
-- unsafe conditions on one side (c8 has a UDT), not pushed down.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = 'foo' ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
QUERY PLAN
-----------------------------------------------------------------------------
-- in the SELECT clause. In this test unsafe clause needs to have column
-- references from both joining sides so that the clause is not pushed down
-- into one of the joining sides.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-------------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- Aggregate after UNION, for testing setrefs
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
----------------------------------------------------------------------------------------------------------------------------------------------------
(10 rows)
-- join with lateral reference
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
1
(10 rows)
--- create another user for permission, user mapping, effective user tests
-CREATE USER view_owner;
--- grant privileges on ft4 and ft5 to view_owner
-GRANT ALL ON ft4 TO view_owner;
-GRANT ALL ON ft5 TO view_owner;
--- prepare statement with current session user
-PREPARE join_stmt AS SELECT t1.c1, t2.c1 FROM ft4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
-EXPLAIN (COSTS OFF, VERBOSE) EXECUTE join_stmt;
- QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Limit
- Output: t1.c1, t2.c1
- -> Foreign Scan
- Output: t1.c1, t2.c1
- Relations: (public.ft4 t1) LEFT JOIN (public.ft5 t2)
- Remote SQL: SELECT r1.c1, r2.c1 FROM ("S 1"."T 3" r1 LEFT JOIN "S 1"."T 4" r2 ON (((r1.c1 = r2.c1)))) ORDER BY r1.c1 ASC NULLS LAST, r2.c1 ASC NULLS LAST
-(6 rows)
-
-EXECUTE join_stmt;
- c1 | c1
-----+----
- 22 |
- 24 | 24
- 26 |
- 28 |
- 30 | 30
- 32 |
- 34 |
- 36 | 36
- 38 |
- 40 |
-(10 rows)
-
--- change the session user to view_owner and execute the statement. Because of
--- change in session user, the plan should get invalidated and created again.
--- The join will not be pushed down since the joining relations do not have a
--- valid user mapping.
-SET SESSION ROLE view_owner;
-EXPLAIN (COSTS OFF, VERBOSE) EXECUTE join_stmt;
- QUERY PLAN
-------------------------------------------------------------------
- Limit
- Output: t1.c1, t2.c1
- -> Sort
- Output: t1.c1, t2.c1
- Sort Key: t1.c1, t2.c1
- -> Hash Left Join
- Output: t1.c1, t2.c1
- Hash Cond: (t1.c1 = t2.c1)
- -> Foreign Scan on public.ft4 t1
- Output: t1.c1, t1.c2, t1.c3
- Remote SQL: SELECT c1 FROM "S 1"."T 3"
- -> Hash
- Output: t2.c1
- -> Foreign Scan on public.ft5 t2
- Output: t2.c1
- Remote SQL: SELECT c1 FROM "S 1"."T 4"
-(16 rows)
-
-RESET ROLE;
-DEALLOCATE join_stmt;
-CREATE VIEW v_ft5 AS SELECT * FROM ft5;
--- change owner of v_ft5 to view_owner so that the effective user for scan on
--- ft5 is view_owner and not the current user.
-ALTER VIEW v_ft5 OWNER TO view_owner;
--- create a public user mapping for loopback server
--- drop user mapping for current_user.
-DROP USER MAPPING FOR CURRENT_USER SERVER loopback;
-CREATE USER MAPPING FOR PUBLIC SERVER loopback;
--- different effective user for permission check, but same user mapping for the
--- 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;
-EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt;
- QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------------------------------
- Limit
- Output: t1.c1, ft5.c1
- -> Foreign Scan
- Output: t1.c1, ft5.c1
- 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 (((r1.c1 = r6.c1)))) ORDER BY r1.c1 ASC NULLS LAST
-(6 rows)
-
-EXECUTE join_stmt;
- c1 | c1
-----+----
-(0 rows)
-
--- create user mapping for view_owner and execute the prepared statement
--- the join should not be pushed down since joining relations now use two
--- different user mappings
-CREATE USER MAPPING FOR view_owner SERVER loopback;
-EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt;
- QUERY PLAN
----------------------------------------------------------------------------------------
- Limit
- Output: t1.c1, ft5.c1
- -> Merge Join
- Output: t1.c1, ft5.c1
- Merge Cond: (t1.c1 = ft5.c1)
- -> Foreign Scan on public.ft5 t1
- Output: t1.c1, t1.c2, t1.c3
- Remote SQL: SELECT c1 FROM "S 1"."T 4" ORDER BY c1 ASC NULLS LAST
- -> Materialize
- Output: ft5.c1, ft5.c2, ft5.c3
- -> Foreign Scan on public.ft5
- Output: ft5.c1, ft5.c2, ft5.c3
- Remote SQL: SELECT c1 FROM "S 1"."T 4" ORDER BY c1 ASC NULLS LAST
-(13 rows)
-
-EXECUTE join_stmt;
- c1 | c1
-----+----
-(0 rows)
-
--- If a sub-join can't be pushed down, upper level join shouldn't be either.
-EXPLAIN (COSTS false, VERBOSE)
-SELECT t1.c1, t2.c1 FROM (ft5 t1 JOIN v_ft5 t2 ON (t1.c1 = t2.c1)) left join (ft5 t3 JOIN v_ft5 t4 ON (t3.c1 = t4.c1)) ON (t1.c1 = t3.c1);
- QUERY PLAN
-------------------------------------------------------------------
- Hash Join
- Output: t1.c1, ft5.c1
- Hash Cond: (t1.c1 = ft5.c1)
- -> Hash Right Join
- Output: t1.c1
- Hash Cond: (t3.c1 = t1.c1)
- -> Hash Join
- Output: t3.c1
- Hash Cond: (t3.c1 = ft5_1.c1)
- -> Foreign Scan on public.ft5 t3
- Output: t3.c1, t3.c2, t3.c3
- Remote SQL: SELECT c1 FROM "S 1"."T 4"
- -> Hash
- Output: ft5_1.c1
- -> Foreign Scan on public.ft5 ft5_1
- Output: ft5_1.c1
- Remote SQL: SELECT c1 FROM "S 1"."T 4"
- -> Hash
- Output: t1.c1
- -> Foreign Scan on public.ft5 t1
- Output: t1.c1
- Remote SQL: SELECT c1 FROM "S 1"."T 4"
- -> Hash
- Output: ft5.c1
- -> Foreign Scan on public.ft5
- Output: ft5.c1
- Remote SQL: SELECT c1 FROM "S 1"."T 4"
-(27 rows)
-
-- non-Var items in targelist of the nullable rel of a join preventing
-- push-down in some cases
-- unable to push {ft1, ft2}
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT q.a, ft2.c1 FROM (SELECT 13 FROM ft1 WHERE c1 = 13) q(a) RIGHT JOIN ft2 ON (q.a = ft2.c1) WHERE ft2.c1 BETWEEN 10 AND 15;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------
(6 rows)
-- ok to push {ft1, ft2} but not {ft1, ft2, ft4}
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT ft4.c1, q.* FROM ft4 LEFT JOIN (SELECT 13, ft1.c1, ft2.c1 FROM ft1 RIGHT JOIN ft2 ON (ft1.c1 = ft2.c1) WHERE ft1.c1 = 12) q(a, b, c) ON (ft4.c1 = q.b) WHERE ft4.c1 BETWEEN 10 AND 15;
QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
14 | | |
(3 rows)
--- recreate the dropped user mapping for further tests
-CREATE USER MAPPING FOR CURRENT_USER SERVER loopback;
-DROP USER MAPPING FOR PUBLIC SERVER loopback;
-- join with nullable side with some columns with null values
UPDATE ft5 SET c3 = null where c1 % 9 = 0;
-EXPLAIN VERBOSE SELECT ft5, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2 FROM ft5 left join ft4 on ft5.c1 = ft4.c1 WHERE ft4.c1 BETWEEN 10 and 30 ORDER BY ft5.c1, ft4.c1;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT ft5, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2 FROM ft5 left join ft4 on ft5.c1 = ft4.c1 WHERE ft4.c1 BETWEEN 10 and 30 ORDER BY ft5.c1, ft4.c1;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- Foreign Scan (cost=100.00..106.81 rows=7 width=62)
+ Foreign Scan
Output: ft5.*, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2
Relations: (public.ft5) INNER JOIN (public.ft4)
Remote SQL: SELECT CASE WHEN (r1.*)::text IS NOT NULL THEN ROW(r1.c1, r1.c2, r1.c3) END, r1.c1, r1.c2, r1.c3, r2.c1, r2.c2 FROM ("S 1"."T 4" r1 INNER JOIN "S 1"."T 3" r2 ON (((r1.c1 = r2.c1)) AND ((r2.c1 >= 10)) AND ((r2.c1 <= 30)))) ORDER BY r1.c1 ASC NULLS LAST
(30,31,AAA030) | 30 | 31 | AAA030 | 30 | 31
(4 rows)
+-- check join pushdown in situations where multiple userids are involved
+CREATE ROLE regress_view_owner;
+CREATE USER MAPPING FOR regress_view_owner SERVER loopback;
+GRANT SELECT ON ft4 TO regress_view_owner;
+GRANT SELECT ON ft5 TO regress_view_owner;
+CREATE VIEW v4 AS SELECT * FROM ft4;
+CREATE VIEW v5 AS SELECT * FROM ft5;
+ALTER VIEW v5 OWNER TO regress_view_owner;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can't be pushed down, different view owners
+ QUERY PLAN
+----------------------------------------------------------------------
+ Limit
+ Output: ft4.c1, ft5.c2, ft5.c1
+ -> Sort
+ Output: ft4.c1, ft5.c2, ft5.c1
+ Sort Key: ft4.c1, ft5.c1
+ -> Hash Left Join
+ Output: ft4.c1, ft5.c2, 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"
+ -> Hash
+ Output: ft5.c2, ft5.c1
+ -> Foreign Scan on public.ft5
+ Output: ft5.c2, ft5.c1
+ Remote SQL: SELECT c1, c2 FROM "S 1"."T 4"
+(16 rows)
+
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ c1 | c2
+----+----
+ 22 |
+ 24 | 25
+ 26 |
+ 28 |
+ 30 | 31
+ 32 |
+ 34 |
+ 36 | 37
+ 38 |
+ 40 |
+(10 rows)
+
+ALTER VIEW v4 OWNER TO regress_view_owner;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can be pushed down
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Limit
+ Output: ft4.c1, ft5.c2, ft5.c1
+ -> Foreign Scan
+ Output: ft4.c1, ft5.c2, ft5.c1
+ Relations: (public.ft4) LEFT JOIN (public.ft5)
+ Remote SQL: SELECT r6.c1, r9.c2, r9.c1 FROM ("S 1"."T 3" r6 LEFT JOIN "S 1"."T 4" r9 ON (((r6.c1 = r9.c1)))) ORDER BY r6.c1 ASC NULLS LAST, r9.c1 ASC NULLS LAST
+(6 rows)
+
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ c1 | c2
+----+----
+ 22 |
+ 24 | 25
+ 26 |
+ 28 |
+ 30 | 31
+ 32 |
+ 34 |
+ 36 | 37
+ 38 |
+ 40 |
+(10 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can't be pushed down, view owner not current user
+ QUERY PLAN
+----------------------------------------------------------------------
+ Limit
+ Output: ft4.c1, t2.c2, t2.c1
+ -> Sort
+ Output: ft4.c1, t2.c2, t2.c1
+ Sort Key: ft4.c1, t2.c1
+ -> Hash Left Join
+ Output: ft4.c1, t2.c2, t2.c1
+ Hash Cond: (ft4.c1 = t2.c1)
+ -> Foreign Scan on public.ft4
+ Output: ft4.c1, ft4.c2, ft4.c3
+ Remote SQL: SELECT c1 FROM "S 1"."T 3"
+ -> Hash
+ Output: t2.c2, t2.c1
+ -> Foreign Scan on public.ft5 t2
+ Output: t2.c2, t2.c1
+ Remote SQL: SELECT c1, c2 FROM "S 1"."T 4"
+(16 rows)
+
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ c1 | c2
+----+----
+ 22 |
+ 24 | 25
+ 26 |
+ 28 |
+ 30 | 31
+ 32 |
+ 34 |
+ 36 | 37
+ 38 |
+ 40 |
+(10 rows)
+
+ALTER VIEW v4 OWNER TO CURRENT_USER;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can be pushed down
+ QUERY PLAN
+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Limit
+ Output: ft4.c1, t2.c2, t2.c1
+ -> Foreign Scan
+ Output: ft4.c1, t2.c2, t2.c1
+ Relations: (public.ft4) LEFT JOIN (public.ft5 t2)
+ Remote SQL: SELECT r6.c1, r2.c2, r2.c1 FROM ("S 1"."T 3" r6 LEFT JOIN "S 1"."T 4" r2 ON (((r6.c1 = r2.c1)))) ORDER BY r6.c1 ASC NULLS LAST, r2.c1 ASC NULLS LAST
+(6 rows)
+
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ c1 | c2
+----+----
+ 22 |
+ 24 | 25
+ 26 |
+ 28 |
+ 30 | 31
+ 32 |
+ 34 |
+ 36 | 37
+ 38 |
+ 40 |
+(10 rows)
+
+ALTER VIEW v4 OWNER TO regress_view_owner;
+-- cleanup
+DROP OWNED BY regress_view_owner;
+DROP ROLE regress_view_owner;
-- ===================================================================
-- parameterized queries
-- ===================================================================
-- 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;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st1(1, 2);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st1(1, 2);
QUERY PLAN
------------------------------------------------------------------------------------------------------------------------------
Foreign Scan
-- subquery using stable function (can't be sent to remote)
PREPARE st2(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c4) = '1970-01-17'::date) ORDER BY c1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st2(10, 20);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st2(10, 20);
QUERY PLAN
----------------------------------------------------------------------------------------------------------
Sort
-- subquery using immutable function (can be sent to remote)
PREPARE st3(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c5) = '1970-01-17'::date) ORDER BY c1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st3(10, 20);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st3(10, 20);
QUERY PLAN
-----------------------------------------------------------------------------------------------------------------------
Sort
-- custom plan should be chosen initially
PREPARE st4(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 = $1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(3 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
(3 rows)
-- once we try it enough times, should switch to generic plan
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
QUERY PLAN
-------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
-- value of $1 should not be sent to remote
PREPARE st5(user_enum,int) AS SELECT * FROM ft1 t1 WHERE c8 = $1 and c1 = $2;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(4 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(4 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(4 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(4 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
---------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
Remote SQL: SELECT "C 1", c2, c3, c4, c5, c6, c7, c8 FROM "S 1"."T 1" WHERE (("C 1" = 1))
(4 rows)
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
QUERY PLAN
-------------------------------------------------------------------------------------------------------
Foreign Scan on public.ft1 t1
DEALLOCATE st4;
DEALLOCATE st5;
-- System columns, except ctid, should not be sent to remote
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft1 t1 WHERE t1.tableoid = 'pg_class'::regclass LIMIT 1;
QUERY PLAN
-------------------------------------------------------------------------------
1 | 1 | 00001 | Fri Jan 02 00:00:00 1970 PST | Fri Jan 02 00:00:00 1970 | 1 | 1 | foo
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT tableoid::regclass, * FROM ft1 t1 LIMIT 1;
QUERY PLAN
-------------------------------------------------------------------------------
ft1 | 1 | 1 | 00001 | Fri Jan 02 00:00:00 1970 PST | Fri Jan 02 00:00:00 1970 | 1 | 1 | foo
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft1 t1 WHERE t1.ctid = '(0,2)';
QUERY PLAN
-------------------------------------------------------------------------------------------------------
2 | 2 | 00002 | Sat Jan 03 00:00:00 1970 PST | Sat Jan 03 00:00:00 1970 | 2 | 2 | foo
(1 row)
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT ctid, * FROM ft1 t1 LIMIT 1;
QUERY PLAN
-------------------------------------------------------------------------------------
-- Above DMLs add data with c6 as NULL in ft1, so test ORDER BY NULLS LAST and NULLs
-- FIRST behavior here.
-- ORDER BY DESC NULLS LAST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 DESC NULLS LAST, c1 OFFSET 795 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 DESC NULLS LAST, c1 OFFSET 795 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------
Limit
(10 rows)
-- ORDER BY DESC NULLS FIRST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 DESC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 DESC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
QUERY PLAN
----------------------------------------------------------------------------------------------------------------------------------
Limit
(10 rows)
-- ORDER BY ASC NULLS FIRST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 ASC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 ASC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------
Limit
-- ===================================================================
-- Consistent check constraints provide consistent results
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2positive CHECK (c2 >= 0);
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 < 0;
QUERY PLAN
-------------------------------------------------------------------
Aggregate
(1 row)
SET constraint_exclusion = 'on';
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 < 0;
QUERY PLAN
--------------------------------
Aggregate
ALTER FOREIGN TABLE ft1 DROP CONSTRAINT ft1_c2positive;
-- But inconsistent check constraints provide inconsistent results
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2negative CHECK (c2 < 0);
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 >= 0;
QUERY PLAN
--------------------------------------------------------------------
Aggregate
(1 row)
SET constraint_exclusion = 'on';
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 >= 0;
QUERY PLAN
--------------------------------
Aggregate
(1 row)
ROLLBACK;
--- Cleanup
-DROP OWNED BY view_owner;
-DROP USER view_owner;
FdwScanPrivateRetrievedAttrs,
/* Integer representing the desired fetch_size */
FdwScanPrivateFetchSize,
- /* Oid of user mapping to be used while connecting to the foreign server */
- FdwScanPrivateUserMappingOid,
/*
* String describing join i.e. names of relations being joined and types
* Build the fdw_private list that will be available to the executor.
* Items in the list must match order in enum FdwScanPrivateIndex.
*/
- fdw_private = list_make5(makeString(sql.data),
+ fdw_private = list_make4(makeString(sql.data),
remote_conds,
retrieved_attrs,
- makeInteger(fpinfo->fetch_size),
- makeInteger(foreignrel->umid));
+ makeInteger(fpinfo->fetch_size));
if (foreignrel->reloptkind == RELOPT_JOINREL)
fdw_private = lappend(fdw_private,
makeString(fpinfo->relation_name->data));
ForeignScan *fsplan = (ForeignScan *) node->ss.ps.plan;
EState *estate = node->ss.ps.state;
PgFdwScanState *fsstate;
+ RangeTblEntry *rte;
+ Oid userid;
+ ForeignTable *table;
UserMapping *user;
+ int rtindex;
int numParams;
/*
node->fdw_state = (void *) fsstate;
/*
- * Obtain the foreign server where to connect and user mapping to use for
- * connection. For base relations we obtain this information from
- * catalogs. For join relations, this information is frozen at the time of
- * planning to ensure that the join is safe to pushdown. In case the
- * information goes stale between planning and execution, plan will be
- * invalidated and replanned.
+ * Identify which user to do the remote access as. This should match what
+ * ExecCheckRTEPerms() does. In case of a join, use the lowest-numbered
+ * member RTE as a representative; we would get the same result from any.
*/
if (fsplan->scan.scanrelid > 0)
- {
- ForeignTable *table;
-
- /*
- * Identify which user to do the remote access as. This should match
- * what ExecCheckRTEPerms() does.
- */
- RangeTblEntry *rte = rt_fetch(fsplan->scan.scanrelid, estate->es_range_table);
- Oid userid = rte->checkAsUser ? rte->checkAsUser : GetUserId();
-
- fsstate->rel = node->ss.ss_currentRelation;
- table = GetForeignTable(RelationGetRelid(fsstate->rel));
-
- user = GetUserMapping(userid, table->serverid);
- }
+ rtindex = fsplan->scan.scanrelid;
else
- {
- Oid umid = intVal(list_nth(fsplan->fdw_private, FdwScanPrivateUserMappingOid));
+ rtindex = bms_next_member(fsplan->fs_relids, -1);
+ rte = rt_fetch(rtindex, estate->es_range_table);
+ userid = rte->checkAsUser ? rte->checkAsUser : GetUserId();
- user = GetUserMappingById(umid);
- Assert(fsplan->fs_server == user->serverid);
- }
+ /* Get info about foreign table. */
+ table = GetForeignTable(rte->relid);
+ user = GetUserMapping(userid, table->serverid);
/*
* Get connection to the foreign server. Connection manager will
* into local representation and error reporting during that process.
*/
if (fsplan->scan.scanrelid > 0)
+ {
+ fsstate->rel = node->ss.ss_currentRelation;
fsstate->tupdesc = RelationGetDescr(fsstate->rel);
+ }
else
+ {
+ fsstate->rel = NULL;
fsstate->tupdesc = node->ss.ss_ScanTupleSlot->tts_tupleDescriptor;
+ }
fsstate->attinmeta = TupleDescGetAttInMetadata(fsstate->tupdesc);
List *joinclauses;
List *otherclauses;
- /*
- * Core code may call GetForeignJoinPaths hook even when the join relation
- * doesn't have a valid user mapping associated with it. See
- * build_join_rel() for details. We can't push down such join, since there
- * doesn't exist a user mapping which can be used to connect to the
- * foreign server.
- */
- if (!OidIsValid(joinrel->umid))
- return false;
-
/*
* We support pushing down INNER, LEFT, RIGHT and FULL OUTER joins.
* Constructing queries representing SEMI and ANTI joins is hard, hence
fpinfo->use_remote_estimate = fpinfo_o->use_remote_estimate ||
fpinfo_i->use_remote_estimate;
+ /* Get user mapping */
+ if (fpinfo->use_remote_estimate)
+ {
+ if (fpinfo_o->use_remote_estimate)
+ fpinfo->user = fpinfo_o->user;
+ else
+ fpinfo->user = fpinfo_i->user;
+ }
+ else
+ fpinfo->user = NULL;
+
+ /* Get foreign server */
+ fpinfo->server = fpinfo_o->server;
+
/*
* Since both the joining relations come from the same server, the server
* level options should have same value for both the relations. Pick from
cost_qual_eval(&fpinfo->local_conds_cost, fpinfo->local_conds, root);
/*
- * If we are going to estimate the costs using EXPLAIN, we will need
- * connection information. Fill it here.
+ * If we are going to estimate costs locally, estimate the join clause
+ * selectivity here while we have special join info.
*/
- if (fpinfo->use_remote_estimate)
- fpinfo->user = GetUserMappingById(joinrel->umid);
- else
- {
- fpinfo->user = NULL;
-
- /*
- * If we are going to estimate costs locally, estimate the join clause
- * selectivity here while we have special join info.
- */
+ if (!fpinfo->use_remote_estimate)
fpinfo->joinclause_sel = clauselist_selectivity(root, fpinfo->joinclauses,
0, fpinfo->jointype,
extra->sjinfo);
- }
- fpinfo->server = GetForeignServer(joinrel->serverid);
-
/* Estimate costs for bare join relation */
estimate_path_cost_size(root, joinrel, NIL, NIL, &rows,
&width, &startup_cost, &total_cost);
-- simple queries
-- ===================================================================
-- single table without alias
-EXPLAIN (COSTS false) SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
+EXPLAIN (COSTS OFF) SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
-- single table with alias - also test that tableoid sort is not pushed to remote side
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1, t1.tableoid OFFSET 100 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1, t1.tableoid OFFSET 100 LIMIT 10;
SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1, t1.tableoid OFFSET 100 LIMIT 10;
-- whole-row reference
-EXPLAIN (VERBOSE, COSTS false) SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
-- empty result
SELECT * FROM ft1 WHERE false;
-- with WHERE clause
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
-- with FOR UPDATE/SHARE
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
-- aggregate
SELECT COUNT(*) FROM ft1 t1;
SET enable_hashjoin TO false;
SET enable_nestloop TO false;
-- inner join; expressions in the clauses appear in the equivalence class list
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2."C 1" FROM ft2 t1 JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
SELECT t1.c1, t2."C 1" FROM ft2 t1 JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
-- outer join; expressions in the clauses do not appear in equivalence class
-- list but no output change as compared to the previous query
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2."C 1" FROM ft2 t1 LEFT JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
SELECT t1.c1, t2."C 1" FROM ft2 t1 LEFT JOIN "S 1"."T 1" t2 ON (t1.c1 = t2."C 1") OFFSET 100 LIMIT 10;
-- A join between local table and foreign join. ORDER BY clause is added to the
-- foreign join so that the local table can be joined using merge join strategy.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- Test similar to above, except that the full join prevents any equivalence
-- classes from being merged. This produces single relation equivalence classes
-- included in join restrictions.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 left join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 left join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
-- Test similar to above with all full outer joins
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 full join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
SELECT t1."C 1", t2.c1, t3.c1 FROM "S 1"."T 1" t1 full join ft1 t2 full join ft2 t3 on (t2.c1 = t3.c1) on (t3.c1 = t1."C 1") OFFSET 100 LIMIT 10;
RESET enable_hashjoin;
-- ===================================================================
-- WHERE with remotely-executable conditions
-- ===================================================================
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 1; -- Var, OpExpr(b), Const
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 100 AND t1.c2 = 0; -- BoolExpr
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NULL; -- NullTest
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NOT NULL; -- NullTest
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE round(abs(c1), 0) = 1; -- FuncExpr
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = -c1; -- OpExpr(l)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE 1 = c1!; -- OpExpr(r)
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE (c1 IS NOT NULL) IS DISTINCT FROM (c1 IS NOT NULL); -- DistinctExpr
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = ANY(ARRAY[c2, 1, c1 + 0]); -- ScalarArrayOpExpr
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = (ARRAY[c1,c2,3])[1]; -- ArrayRef
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c6 = E'foo''s\\bar'; -- check special chars
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c8 = 'foo'; -- can't be sent to remote
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 1; -- Var, OpExpr(b), Const
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE t1.c1 = 100 AND t1.c2 = 0; -- BoolExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 IS NULL; -- NullTest
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 IS NOT NULL; -- NullTest
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE round(abs(c1), 0) = 1; -- FuncExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = -c1; -- OpExpr(l)
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE 1 = c1!; -- OpExpr(r)
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE (c1 IS NOT NULL) IS DISTINCT FROM (c1 IS NOT NULL); -- DistinctExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = ANY(ARRAY[c2, 1, c1 + 0]); -- ScalarArrayOpExpr
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c1 = (ARRAY[c1,c2,3])[1]; -- ArrayRef
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c6 = E'foo''s\\bar'; -- check special chars
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 t1 WHERE c8 = 'foo'; -- can't be sent to remote
-- parameterized remote path for foreign table
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM "S 1"."T 1" a, ft2 b WHERE a."C 1" = 47 AND b.c1 = a.c2;
SELECT * FROM ft2 a, ft2 b WHERE a.c1 = 47 AND b.c1 = a.c2;
-- check both safe and unsafe join conditions
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 a, ft2 b
WHERE a.c2 = 6 AND b.c1 = a.c1 AND a.c8 = 'foo' AND b.c7 = upper(a.c7);
SELECT * FROM ft2 a, ft2 b
SELECT * FROM ft2 WHERE c1 = ANY (ARRAY(SELECT c1 FROM ft1 WHERE c1 < 5));
-- we should not push order by clause with volatile expressions or unsafe
-- collations
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 ORDER BY ft2.c1, random();
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft2 ORDER BY ft2.c1, ft2.c3 collate "C";
-- user-defined operator/function
);
-- built-in operators and functions can be shipped for remote execution
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = abs(t1.c2);
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = abs(t1.c2);
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = t1.c2;
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = t1.c2;
-- by default, user-defined ones cannot
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
ALTER SERVER loopback OPTIONS (ADD extensions 'postgres_fdw');
-- ... now they can be shipped
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
SELECT count(c3) FROM ft1 t1 WHERE t1.c1 === t1.c2;
ANALYZE ft5;
-- join two tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
-- left outer join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT 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) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- left outer join + placement of clauses.
-- clauses within the nullable side are not pulled up, but top level clause on
-- non-nullable side is pushed into non-nullable side
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1) WHERE t1.c1 < 10;
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1) WHERE t1.c1 < 10;
-- clauses within the nullable side are not pulled up, but the top level clause
-- on nullable side is not pushed down into nullable side
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1)
WHERE (t2.c1 < 10 OR t2.c1 IS NULL) AND t1.c1 < 10;
SELECT t1.c1, t1.c2, t2.c1, t2.c2 FROM ft4 t1 LEFT JOIN (SELECT * FROM ft5 WHERE c1 < 10) t2 ON (t1.c1 = t2.c1)
WHERE (t2.c1 < 10 OR t2.c1 IS NULL) AND t1.c1 < 10;
-- right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft5 t1 RIGHT JOIN ft4 t2 ON (t1.c1 = t2.c1) ORDER BY t2.c1, t1.c1 OFFSET 10 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft5 t1 RIGHT JOIN ft4 t2 ON (t1.c1 = t2.c1) ORDER BY t2.c1, t1.c1 OFFSET 10 LIMIT 10;
-- right outer join three tables
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT 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 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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)
+EXPLAIN (VERBOSE, COSTS OFF)
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)
+EXPLAIN (VERBOSE, COSTS OFF)
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
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- full outer join + right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL 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 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) RIGHT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- right outer join + full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT 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 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- full outer join + left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 FULL JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT 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) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- left outer join + full outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 LEFT 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 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) FULL JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- right outer join + left outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
SELECT t1.c1, t2.c2, t3.c3 FROM ft2 t1 RIGHT JOIN ft2 t2 ON (t1.c1 = t2.c1) LEFT JOIN ft4 t3 ON (t2.c1 = t3.c1) OFFSET 10 LIMIT 10;
-- left outer join + right outer join
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- full outer join + WHERE clause, only matched rows
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) WHERE (t1.c1 = t2.c1 OR t1.c1 IS NULL) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft4 t1 FULL JOIN ft5 t2 ON (t1.c1 = t2.c1) WHERE (t1.c1 = t2.c1 OR t1.c1 IS NULL) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
-- join two tables with FOR UPDATE clause
-- tests whole-row reference for row marks
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- join two tables with FOR SHARE clause
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- join in CTE
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- ctid with whole-row reference
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- SEMI JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1 FROM ft1 t1 WHERE EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c1) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1 FROM ft1 t1 WHERE EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c1) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
-- ANTI JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1 FROM ft1 t1 WHERE NOT EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c2) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1 FROM ft1 t1 WHERE NOT EXISTS (SELECT 1 FROM ft2 t2 WHERE t1.c1 = t2.c2) ORDER BY t1.c1 OFFSET 100 LIMIT 10;
-- CROSS JOIN, not pushed down
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 CROSS JOIN ft2 t2 ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft1 t1 CROSS JOIN ft2 t2 ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
-- different server, not pushed down. No result expected.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft5 t1 JOIN ft6 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft5 t1 JOIN ft6 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
-- unsafe join conditions (c8 has a UDT), not pushed down. Practically a CROSS
-- JOIN since c8 in both tables has same value.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c8 = t2.c8) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c8 = t2.c8) ORDER BY t1.c1, t2.c1 OFFSET 100 LIMIT 10;
-- unsafe conditions on one side (c8 has a UDT), not pushed down.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = 'foo' ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
SELECT t1.c1, t2.c1 FROM ft1 t1 LEFT JOIN ft2 t2 ON (t1.c1 = t2.c1) WHERE t1.c8 = 'foo' ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
-- join where unsafe to pushdown condition in WHERE clause has a column not
-- in the SELECT clause. In this test unsafe clause needs to have column
-- references from both joining sides so that the clause is not pushed down
-- into one of the joining sides.
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- Aggregate after UNION, for testing setrefs
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
-- join with lateral reference
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
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;
--- create another user for permission, user mapping, effective user tests
-CREATE USER view_owner;
--- grant privileges on ft4 and ft5 to view_owner
-GRANT ALL ON ft4 TO view_owner;
-GRANT ALL ON ft5 TO view_owner;
--- prepare statement with current session user
-PREPARE join_stmt AS SELECT t1.c1, t2.c1 FROM ft4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
-EXPLAIN (COSTS OFF, VERBOSE) EXECUTE join_stmt;
-EXECUTE join_stmt;
--- change the session user to view_owner and execute the statement. Because of
--- change in session user, the plan should get invalidated and created again.
--- The join will not be pushed down since the joining relations do not have a
--- valid user mapping.
-SET SESSION ROLE view_owner;
-EXPLAIN (COSTS OFF, VERBOSE) EXECUTE join_stmt;
-RESET ROLE;
-DEALLOCATE join_stmt;
-
-CREATE VIEW v_ft5 AS SELECT * FROM ft5;
--- change owner of v_ft5 to view_owner so that the effective user for scan on
--- ft5 is view_owner and not the current user.
-ALTER VIEW v_ft5 OWNER TO view_owner;
--- create a public user mapping for loopback server
--- drop user mapping for current_user.
-DROP USER MAPPING FOR CURRENT_USER SERVER loopback;
-CREATE USER MAPPING FOR PUBLIC SERVER loopback;
--- different effective user for permission check, but same user mapping for the
--- 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;
-EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt;
-EXECUTE join_stmt;
--- create user mapping for view_owner and execute the prepared statement
--- the join should not be pushed down since joining relations now use two
--- different user mappings
-CREATE USER MAPPING FOR view_owner SERVER loopback;
-EXPLAIN (COSTS false, VERBOSE) EXECUTE join_stmt;
-EXECUTE join_stmt;
-
--- If a sub-join can't be pushed down, upper level join shouldn't be either.
-EXPLAIN (COSTS false, VERBOSE)
-SELECT t1.c1, t2.c1 FROM (ft5 t1 JOIN v_ft5 t2 ON (t1.c1 = t2.c1)) left join (ft5 t3 JOIN v_ft5 t4 ON (t3.c1 = t4.c1)) ON (t1.c1 = t3.c1);
-
-- non-Var items in targelist of the nullable rel of a join preventing
-- push-down in some cases
-- unable to push {ft1, ft2}
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT q.a, ft2.c1 FROM (SELECT 13 FROM ft1 WHERE c1 = 13) q(a) RIGHT JOIN ft2 ON (q.a = ft2.c1) WHERE ft2.c1 BETWEEN 10 AND 15;
SELECT q.a, ft2.c1 FROM (SELECT 13 FROM ft1 WHERE c1 = 13) q(a) RIGHT JOIN ft2 ON (q.a = ft2.c1) WHERE ft2.c1 BETWEEN 10 AND 15;
-- ok to push {ft1, ft2} but not {ft1, ft2, ft4}
-EXPLAIN (COSTS false, VERBOSE)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT ft4.c1, q.* FROM ft4 LEFT JOIN (SELECT 13, ft1.c1, ft2.c1 FROM ft1 RIGHT JOIN ft2 ON (ft1.c1 = ft2.c1) WHERE ft1.c1 = 12) q(a, b, c) ON (ft4.c1 = q.b) WHERE ft4.c1 BETWEEN 10 AND 15;
SELECT ft4.c1, q.* FROM ft4 LEFT JOIN (SELECT 13, ft1.c1, ft2.c1 FROM ft1 RIGHT JOIN ft2 ON (ft1.c1 = ft2.c1) WHERE ft1.c1 = 12) q(a, b, c) ON (ft4.c1 = q.b) WHERE ft4.c1 BETWEEN 10 AND 15;
--- recreate the dropped user mapping for further tests
-CREATE USER MAPPING FOR CURRENT_USER SERVER loopback;
-DROP USER MAPPING FOR PUBLIC SERVER loopback;
-
-- join with nullable side with some columns with null values
UPDATE ft5 SET c3 = null where c1 % 9 = 0;
-EXPLAIN VERBOSE SELECT ft5, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2 FROM ft5 left join ft4 on ft5.c1 = ft4.c1 WHERE ft4.c1 BETWEEN 10 and 30 ORDER BY ft5.c1, ft4.c1;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT ft5, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2 FROM ft5 left join ft4 on ft5.c1 = ft4.c1 WHERE ft4.c1 BETWEEN 10 and 30 ORDER BY ft5.c1, ft4.c1;
SELECT ft5, ft5.c1, ft5.c2, ft5.c3, ft4.c1, ft4.c2 FROM ft5 left join ft4 on ft5.c1 = ft4.c1 WHERE ft4.c1 BETWEEN 10 and 30 ORDER BY ft5.c1, ft4.c1;
+-- check join pushdown in situations where multiple userids are involved
+CREATE ROLE regress_view_owner;
+CREATE USER MAPPING FOR regress_view_owner SERVER loopback;
+GRANT SELECT ON ft4 TO regress_view_owner;
+GRANT SELECT ON ft5 TO regress_view_owner;
+
+CREATE VIEW v4 AS SELECT * FROM ft4;
+CREATE VIEW v5 AS SELECT * FROM ft5;
+ALTER VIEW v5 OWNER TO regress_view_owner;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can't be pushed down, different view owners
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ALTER VIEW v4 OWNER TO regress_view_owner;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can be pushed down
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN v5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can't be pushed down, view owner not current user
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ALTER VIEW v4 OWNER TO CURRENT_USER;
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10; -- can be pushed down
+SELECT t1.c1, t2.c2 FROM v4 t1 LEFT JOIN ft5 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c1, t2.c1 OFFSET 10 LIMIT 10;
+ALTER VIEW v4 OWNER TO regress_view_owner;
+
+-- cleanup
+DROP OWNED BY regress_view_owner;
+DROP ROLE regress_view_owner;
+
-- ===================================================================
-- parameterized queries
-- ===================================================================
-- 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;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st1(1, 2);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st1(1, 2);
EXECUTE st1(1, 1);
EXECUTE st1(101, 101);
-- subquery using stable function (can't be sent to remote)
PREPARE st2(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c4) = '1970-01-17'::date) ORDER BY c1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st2(10, 20);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st2(10, 20);
EXECUTE st2(10, 20);
EXECUTE st2(101, 121);
-- subquery using immutable function (can be sent to remote)
PREPARE st3(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c5) = '1970-01-17'::date) ORDER BY c1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st3(10, 20);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st3(10, 20);
EXECUTE st3(10, 20);
EXECUTE st3(20, 30);
-- custom plan should be chosen initially
PREPARE st4(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 = $1;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
-- once we try it enough times, should switch to generic plan
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st4(1);
-- value of $1 should not be sent to remote
PREPARE st5(user_enum,int) AS SELECT * FROM ft1 t1 WHERE c8 = $1 and c1 = $2;
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
-EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
+EXPLAIN (VERBOSE, COSTS OFF) EXECUTE st5('foo', 1);
EXECUTE st5('foo', 1);
-- cleanup
DEALLOCATE st5;
-- System columns, except ctid, should not be sent to remote
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft1 t1 WHERE t1.tableoid = 'pg_class'::regclass LIMIT 1;
SELECT * FROM ft1 t1 WHERE t1.tableoid = 'ft1'::regclass LIMIT 1;
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT tableoid::regclass, * FROM ft1 t1 LIMIT 1;
SELECT tableoid::regclass, * FROM ft1 t1 LIMIT 1;
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT * FROM ft1 t1 WHERE t1.ctid = '(0,2)';
SELECT * FROM ft1 t1 WHERE t1.ctid = '(0,2)';
-EXPLAIN (VERBOSE, COSTS false)
+EXPLAIN (VERBOSE, COSTS OFF)
SELECT ctid, * FROM ft1 t1 LIMIT 1;
SELECT ctid, * FROM ft1 t1 LIMIT 1;
-- Above DMLs add data with c6 as NULL in ft1, so test ORDER BY NULLS LAST and NULLs
-- FIRST behavior here.
-- ORDER BY DESC NULLS LAST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 DESC NULLS LAST, c1 OFFSET 795 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 DESC NULLS LAST, c1 OFFSET 795 LIMIT 10;
SELECT * FROM ft1 ORDER BY c6 DESC NULLS LAST, c1 OFFSET 795 LIMIT 10;
-- ORDER BY DESC NULLS FIRST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 DESC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 DESC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
SELECT * FROM ft1 ORDER BY c6 DESC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
-- ORDER BY ASC NULLS FIRST options
-EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 ORDER BY c6 ASC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT * FROM ft1 ORDER BY c6 ASC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
SELECT * FROM ft1 ORDER BY c6 ASC NULLS FIRST, c1 OFFSET 15 LIMIT 10;
-- ===================================================================
-- Consistent check constraints provide consistent results
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2positive CHECK (c2 >= 0);
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 < 0;
SELECT count(*) FROM ft1 WHERE c2 < 0;
SET constraint_exclusion = 'on';
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 < 0;
SELECT count(*) FROM ft1 WHERE c2 < 0;
RESET constraint_exclusion;
-- check constraint is enforced on the remote side, not locally
-- But inconsistent check constraints provide inconsistent results
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2negative CHECK (c2 < 0);
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 >= 0;
SELECT count(*) FROM ft1 WHERE c2 >= 0;
SET constraint_exclusion = 'on';
-EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT count(*) FROM ft1 WHERE c2 >= 0;
SELECT count(*) FROM ft1 WHERE c2 >= 0;
RESET constraint_exclusion;
-- local check constraint is not actually enforced
AND ftoptions @> array['fetch_size=60000'];
ROLLBACK;
-
--- Cleanup
-DROP OWNED BY view_owner;
-DROP USER view_owner;
pstmt = makeNode(PlannedStmt);
pstmt->commandType = CMD_SELECT;
pstmt->queryId = 0;
- pstmt->hasReturning = 0;
- pstmt->hasModifyingCTE = 0;
- pstmt->canSetTag = 1;
- pstmt->transientPlan = 0;
+ pstmt->hasReturning = false;
+ pstmt->hasModifyingCTE = false;
+ pstmt->canSetTag = true;
+ pstmt->transientPlan = false;
+ pstmt->dependsOnRole = false;
+ pstmt->parallelModeNeeded = false;
pstmt->planTree = plan;
pstmt->rtable = estate->es_range_table;
pstmt->resultRelations = NIL;
pstmt->subplans = NIL;
pstmt->rewindPlanIDs = NULL;
pstmt->rowMarks = NIL;
- pstmt->nParamExec = estate->es_plannedstmt->nParamExec;
pstmt->relationOids = NIL;
pstmt->invalItems = NIL; /* workers can't replan anyway... */
- pstmt->hasRowSecurity = false;
- pstmt->hasForeignJoin = false;
+ pstmt->nParamExec = estate->es_plannedstmt->nParamExec;
/* Return serialized copy of our dummy PlannedStmt. */
return nodeToString(pstmt);
extern Datum pg_options_to_table(PG_FUNCTION_ARGS);
extern Datum postgresql_fdw_validator(PG_FUNCTION_ARGS);
-static HeapTuple find_user_mapping(Oid userid, Oid serverid, bool missing_ok);
+static HeapTuple find_user_mapping(Oid userid, Oid serverid);
+
/*
* GetForeignDataWrapper - look up the foreign-data wrapper by OID.
bool isnull;
UserMapping *um;
- tp = find_user_mapping(userid, serverid, false);
+ tp = find_user_mapping(userid, serverid);
um = (UserMapping *) palloc(sizeof(UserMapping));
um->umid = HeapTupleGetOid(tp);
*
* If no mapping is found for the supplied user, we also look for
* PUBLIC mappings (userid == InvalidOid).
- *
- * If missing_ok is true, the function returns InvalidOid when it does not find
- * required user mapping. Otherwise, find_user_mapping() throws error if it
- * does not find required user mapping.
*/
Oid
-GetUserMappingId(Oid userid, Oid serverid, bool missing_ok)
+GetUserMappingId(Oid userid, Oid serverid)
{
HeapTuple tp;
Oid umid;
- tp = find_user_mapping(userid, serverid, missing_ok);
-
- Assert(missing_ok || tp);
-
- if (!tp && missing_ok)
- return InvalidOid;
+ tp = find_user_mapping(userid, serverid);
/* Extract the Oid */
umid = HeapTupleGetOid(tp);
return umid;
}
-
/*
* find_user_mapping - Guts of GetUserMapping family.
*
* If no mapping is found for the supplied user, we also look for
* PUBLIC mappings (userid == InvalidOid).
- *
- * If missing_ok is true, the function returns NULL, if it does not find
- * the required user mapping. Otherwise, it throws error if it does not
- * find the required user mapping.
*/
static HeapTuple
-find_user_mapping(Oid userid, Oid serverid, bool missing_ok)
+find_user_mapping(Oid userid, Oid serverid)
{
HeapTuple tp;
ObjectIdGetDatum(serverid));
if (!HeapTupleIsValid(tp))
- {
- if (missing_ok)
- return NULL;
- else
- ereport(ERROR,
- (errcode(ERRCODE_UNDEFINED_OBJECT),
- errmsg("user mapping not found for \"%s\"",
- MappingUserName(userid))));
- }
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("user mapping not found for \"%s\"",
+ MappingUserName(userid))));
return tp;
}
COPY_SCALAR_FIELD(hasModifyingCTE);
COPY_SCALAR_FIELD(canSetTag);
COPY_SCALAR_FIELD(transientPlan);
+ COPY_SCALAR_FIELD(dependsOnRole);
+ COPY_SCALAR_FIELD(parallelModeNeeded);
COPY_NODE_FIELD(planTree);
COPY_NODE_FIELD(rtable);
COPY_NODE_FIELD(resultRelations);
COPY_NODE_FIELD(relationOids);
COPY_NODE_FIELD(invalItems);
COPY_SCALAR_FIELD(nParamExec);
- COPY_SCALAR_FIELD(hasRowSecurity);
- COPY_SCALAR_FIELD(parallelModeNeeded);
- COPY_SCALAR_FIELD(hasForeignJoin);
return newnode;
}
WRITE_BOOL_FIELD(hasModifyingCTE);
WRITE_BOOL_FIELD(canSetTag);
WRITE_BOOL_FIELD(transientPlan);
+ WRITE_BOOL_FIELD(dependsOnRole);
+ WRITE_BOOL_FIELD(parallelModeNeeded);
WRITE_NODE_FIELD(planTree);
WRITE_NODE_FIELD(rtable);
WRITE_NODE_FIELD(resultRelations);
WRITE_NODE_FIELD(relationOids);
WRITE_NODE_FIELD(invalItems);
WRITE_INT_FIELD(nParamExec);
- WRITE_BOOL_FIELD(hasRowSecurity);
- WRITE_BOOL_FIELD(parallelModeNeeded);
- WRITE_BOOL_FIELD(hasForeignJoin);
}
/*
WRITE_INT_FIELD(nParamExec);
WRITE_UINT_FIELD(lastPHId);
WRITE_UINT_FIELD(lastRowMarkId);
+ WRITE_INT_FIELD(lastPlanNodeId);
WRITE_BOOL_FIELD(transientPlan);
- WRITE_BOOL_FIELD(hasRowSecurity);
+ WRITE_BOOL_FIELD(dependsOnRole);
WRITE_BOOL_FIELD(parallelModeOK);
WRITE_BOOL_FIELD(parallelModeNeeded);
- WRITE_BOOL_FIELD(hasForeignJoin);
}
static void
WRITE_FLOAT_FIELD(allvisfrac, "%.6f");
WRITE_NODE_FIELD(subroot);
WRITE_NODE_FIELD(subplan_params);
+ WRITE_INT_FIELD(rel_parallel_workers);
WRITE_OID_FIELD(serverid);
+ WRITE_OID_FIELD(userid);
+ WRITE_BOOL_FIELD(useridiscurrent);
/* we don't try to print fdwroutine or fdw_private */
WRITE_NODE_FIELD(baserestrictinfo);
WRITE_NODE_FIELD(joininfo);
READ_BOOL_FIELD(hasModifyingCTE);
READ_BOOL_FIELD(canSetTag);
READ_BOOL_FIELD(transientPlan);
+ READ_BOOL_FIELD(dependsOnRole);
+ READ_BOOL_FIELD(parallelModeNeeded);
READ_NODE_FIELD(planTree);
READ_NODE_FIELD(rtable);
READ_NODE_FIELD(resultRelations);
READ_NODE_FIELD(relationOids);
READ_NODE_FIELD(invalItems);
READ_INT_FIELD(nParamExec);
- READ_BOOL_FIELD(hasRowSecurity);
- READ_BOOL_FIELD(parallelModeNeeded);
- READ_BOOL_FIELD(hasForeignJoin);
READ_DONE();
}
/*
* 5. If inner and outer relations are foreign tables (or joins) belonging
- * to the same server and using the same user mapping, give the FDW a
- * chance to push down joins.
+ * to the same server and assigned to the same user to check access
+ * permissions as, give the FDW a chance to push down joins.
*/
if (joinrel->fdwroutine &&
joinrel->fdwroutine->GetForeignJoinPaths)
scan_plan->fs_relids = best_path->path.parent->relids;
/*
- * If a join between foreign relations was pushed down, remember it. The
- * push-down safety of the join depends upon the server and user mapping
- * being same. That can change between planning and execution time, in
- * which case the plan should be invalidated.
+ * If this is a foreign join, and to make it valid to push down we had to
+ * assume that the current user is the same as some user explicitly named
+ * in the query, mark the finished plan as depending on the current user.
*/
- if (scan_relid == 0)
- root->glob->hasForeignJoin = true;
+ if (rel->useridiscurrent)
+ root->glob->dependsOnRole = true;
/*
* Replace any outer-relation variables with nestloop params in the qual,
glob->lastRowMarkId = 0;
glob->lastPlanNodeId = 0;
glob->transientPlan = false;
- glob->hasRowSecurity = false;
- glob->hasForeignJoin = false;
+ glob->dependsOnRole = false;
/*
* Assess whether it's feasible to use parallel mode for this query. We
result->hasModifyingCTE = parse->hasModifyingCTE;
result->canSetTag = parse->canSetTag;
result->transientPlan = glob->transientPlan;
+ result->dependsOnRole = glob->dependsOnRole;
+ result->parallelModeNeeded = glob->parallelModeNeeded;
result->planTree = top_plan;
result->rtable = glob->finalrtable;
result->resultRelations = glob->resultRelations;
result->relationOids = glob->relationOids;
result->invalItems = glob->invalItems;
result->nParamExec = glob->nParamExec;
- result->hasRowSecurity = glob->hasRowSecurity;
- result->parallelModeNeeded = glob->parallelModeNeeded;
- result->hasForeignJoin = glob->hasForeignJoin;
return result;
}
* This may add new security barrier subquery RTEs to the rangetable.
*/
expand_security_quals(root, tlist);
- if (parse->hasRowSecurity)
- root->glob->hasRowSecurity = true;
/*
* We are now done hacking up the query's targetlist. Most of the
* If the current_rel belongs to a single FDW, so does the final_rel.
*/
final_rel->serverid = current_rel->serverid;
- final_rel->umid = current_rel->umid;
+ final_rel->userid = current_rel->userid;
+ final_rel->useridiscurrent = current_rel->useridiscurrent;
final_rel->fdwroutine = current_rel->fdwroutine;
/*
* If the input rel belongs to a single FDW, so does the grouped rel.
*/
grouped_rel->serverid = input_rel->serverid;
- grouped_rel->umid = input_rel->umid;
+ grouped_rel->userid = input_rel->userid;
+ grouped_rel->useridiscurrent = input_rel->useridiscurrent;
grouped_rel->fdwroutine = input_rel->fdwroutine;
/*
* If the input rel belongs to a single FDW, so does the window rel.
*/
window_rel->serverid = input_rel->serverid;
- window_rel->umid = input_rel->umid;
+ window_rel->userid = input_rel->userid;
+ window_rel->useridiscurrent = input_rel->useridiscurrent;
window_rel->fdwroutine = input_rel->fdwroutine;
/*
* If the input rel belongs to a single FDW, so does the distinct_rel.
*/
distinct_rel->serverid = input_rel->serverid;
- distinct_rel->umid = input_rel->umid;
+ distinct_rel->userid = input_rel->userid;
+ distinct_rel->useridiscurrent = input_rel->useridiscurrent;
distinct_rel->fdwroutine = input_rel->fdwroutine;
/* Estimate number of distinct rows there will be */
* If the input rel belongs to a single FDW, so does the ordered_rel.
*/
ordered_rel->serverid = input_rel->serverid;
- ordered_rel->umid = input_rel->umid;
+ ordered_rel->userid = input_rel->userid;
+ ordered_rel->useridiscurrent = input_rel->useridiscurrent;
ordered_rel->fdwroutine = input_rel->fdwroutine;
foreach(lc, input_rel->pathlist)
/*
* extract_query_dependencies
- * Given a not-yet-planned query or queries (i.e. a Query node or list
- * of Query nodes), extract dependencies just as set_plan_references
- * would do.
+ * Given a rewritten, but not yet planned, query or queries
+ * (i.e. a Query node or list of Query nodes), extract dependencies
+ * just as set_plan_references would do. Also detect whether any
+ * rewrite steps were affected by RLS.
*
* This is needed by plancache.c to handle invalidation of cached unplanned
* queries.
glob.type = T_PlannerGlobal;
glob.relationOids = NIL;
glob.invalItems = NIL;
- glob.hasRowSecurity = false;
+ /* Hack: we use glob.dependsOnRole to collect hasRowSecurity flags */
+ glob.dependsOnRole = false;
MemSet(&root, 0, sizeof(root));
root.type = T_PlannerInfo;
*relationOids = glob.relationOids;
*invalItems = glob.invalItems;
- *hasRowSecurity = glob.hasRowSecurity;
+ *hasRowSecurity = glob.dependsOnRole;
}
static bool
Query *query = (Query *) node;
ListCell *lc;
- /* Collect row security information */
- if (query->hasRowSecurity)
- context->glob->hasRowSecurity = true;
-
if (query->commandType == CMD_UTILITY)
{
/*
return false;
}
+ /* Remember if any Query has RLS quals applied by rewriter */
+ if (query->hasRowSecurity)
+ context->glob->dependsOnRole = true;
+
/* Collect relation OIDs in this Query's rtable */
foreach(lc, query->rtable)
{
#include "postgres.h"
#include "miscadmin.h"
-#include "catalog/pg_class.h"
-#include "foreign/foreign.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/pathnode.h"
rel->consider_startup = (root->tuple_fraction > 0);
rel->consider_param_startup = false; /* might get changed later */
rel->consider_parallel = false; /* might get changed later */
- rel->rel_parallel_workers = -1; /* set up in GetRelationInfo */
rel->reltarget = create_empty_pathtarget();
rel->pathlist = NIL;
rel->ppilist = NIL;
rel->allvisfrac = 0;
rel->subroot = NULL;
rel->subplan_params = NIL;
+ rel->rel_parallel_workers = -1; /* set up in GetRelationInfo */
rel->serverid = InvalidOid;
- rel->umid = InvalidOid;
+ rel->userid = rte->checkAsUser;
+ rel->useridiscurrent = false;
rel->fdwroutine = NULL;
rel->fdw_private = NULL;
rel->baserestrictinfo = NIL;
break;
}
- /* For foreign tables get the user mapping */
- if (rte->relkind == RELKIND_FOREIGN_TABLE)
- {
- /*
- * This should match what ExecCheckRTEPerms() does.
- *
- * Note that if the plan ends up depending on the user OID in any way
- * - e.g. if it depends on the computed user mapping OID - we must
- * ensure that it gets invalidated in the case of a user OID change.
- * See RevalidateCachedQuery and more generally the hasForeignJoin
- * flags in PlannerGlobal and PlannedStmt.
- *
- * It's possible, and not necessarily an error, for rel->umid to be
- * InvalidOid even though rel->serverid is set. That just means there
- * is a server with no user mapping.
- */
- Oid userid;
-
- userid = OidIsValid(rte->checkAsUser) ? rte->checkAsUser : GetUserId();
- rel->umid = GetUserMappingId(userid, rel->serverid, true);
- }
- else
- rel->umid = InvalidOid;
-
/* Save the finished struct in the query's simple_rel_array */
root->simple_rel_array[relid] = rel;
joinrel->allvisfrac = 0;
joinrel->subroot = NULL;
joinrel->subplan_params = NIL;
+ joinrel->rel_parallel_workers = -1;
joinrel->serverid = InvalidOid;
- joinrel->umid = InvalidOid;
+ joinrel->userid = InvalidOid;
+ joinrel->useridiscurrent = false;
joinrel->fdwroutine = NULL;
joinrel->fdw_private = NULL;
joinrel->baserestrictinfo = NIL;
/*
* Set up foreign-join fields if outer and inner relation are foreign
- * tables (or joins) belonging to the same server and using the same user
- * mapping.
- *
- * Otherwise those fields are left invalid, so FDW API will not be called
- * for the join relation.
+ * tables (or joins) belonging to the same server and assigned to the same
+ * user to check access permissions as. In addition to an exact match of
+ * userid, we allow the case where one side has zero userid (implying
+ * current user) and the other side has explicit userid that happens to
+ * equal the current user; but in that case, pushdown of the join is only
+ * valid for the current user. The useridiscurrent field records whether
+ * we had to make such an assumption for this join or any sub-join.
*
- * For FDWs like file_fdw, which ignore user mapping, the user mapping id
- * associated with the joining relation may be invalid. A valid serverid
- * distinguishes between a pushed down join with no user mapping and a
- * join which can not be pushed down because of user mapping mismatch.
+ * Otherwise these fields are left invalid, so GetForeignJoinPaths will
+ * not be called for the join relation.
*/
if (OidIsValid(outer_rel->serverid) &&
- inner_rel->serverid == outer_rel->serverid &&
- inner_rel->umid == outer_rel->umid)
+ inner_rel->serverid == outer_rel->serverid)
{
- joinrel->serverid = outer_rel->serverid;
- joinrel->umid = outer_rel->umid;
- joinrel->fdwroutine = outer_rel->fdwroutine;
+ if (inner_rel->userid == outer_rel->userid)
+ {
+ joinrel->serverid = outer_rel->serverid;
+ joinrel->userid = outer_rel->userid;
+ joinrel->useridiscurrent = outer_rel->useridiscurrent || inner_rel->useridiscurrent;
+ joinrel->fdwroutine = outer_rel->fdwroutine;
+ }
+ else if (!OidIsValid(inner_rel->userid) &&
+ outer_rel->userid == GetUserId())
+ {
+ joinrel->serverid = outer_rel->serverid;
+ joinrel->userid = outer_rel->userid;
+ joinrel->useridiscurrent = true;
+ joinrel->fdwroutine = outer_rel->fdwroutine;
+ }
+ else if (!OidIsValid(outer_rel->userid) &&
+ inner_rel->userid == GetUserId())
+ {
+ joinrel->serverid = outer_rel->serverid;
+ joinrel->userid = inner_rel->userid;
+ joinrel->useridiscurrent = true;
+ joinrel->fdwroutine = outer_rel->fdwroutine;
+ }
}
/*
static void AcquirePlannerLocks(List *stmt_list, bool acquire);
static void ScanQueryForLocks(Query *parsetree, bool acquire);
static bool ScanQueryWalker(Node *node, bool *acquire);
-static bool plan_list_is_transient(List *stmt_list);
static TupleDesc PlanCacheComputeResultDesc(List *stmt_list);
static void PlanCacheRelCallback(Datum arg, Oid relid);
static void PlanCacheFuncCallback(Datum arg, int cacheid, uint32 hashvalue);
static void PlanCacheSysCallback(Datum arg, int cacheid, uint32 hashvalue);
-static void PlanCacheUserMappingCallback(Datum arg, int cacheid,
- uint32 hashvalue);
/*
CacheRegisterSyscacheCallback(NAMESPACEOID, PlanCacheSysCallback, (Datum) 0);
CacheRegisterSyscacheCallback(OPEROID, PlanCacheSysCallback, (Datum) 0);
CacheRegisterSyscacheCallback(AMOPOPID, PlanCacheSysCallback, (Datum) 0);
- /* User mapping change may invalidate plans with pushed down foreign join */
- CacheRegisterSyscacheCallback(USERMAPPINGOID, PlanCacheUserMappingCallback, (Datum) 0);
}
/*
plansource->invalItems = NIL;
plansource->search_path = NULL;
plansource->query_context = NULL;
+ plansource->rewriteRoleId = InvalidOid;
+ plansource->rewriteRowSecurity = false;
+ plansource->dependsOnRLS = false;
plansource->gplan = NULL;
plansource->is_oneshot = false;
plansource->is_complete = false;
plansource->generic_cost = -1;
plansource->total_custom_cost = 0;
plansource->num_custom_plans = 0;
- plansource->hasRowSecurity = false;
- plansource->planUserId = InvalidOid;
- plansource->row_security_env = false;
MemoryContextSwitchTo(oldcxt);
plansource->invalItems = NIL;
plansource->search_path = NULL;
plansource->query_context = NULL;
+ plansource->rewriteRoleId = InvalidOid;
+ plansource->rewriteRowSecurity = false;
+ plansource->dependsOnRLS = false;
plansource->gplan = NULL;
plansource->is_oneshot = true;
plansource->is_complete = false;
plansource->generic_cost = -1;
plansource->total_custom_cost = 0;
plansource->num_custom_plans = 0;
- plansource->planUserId = InvalidOid;
- plansource->row_security_env = false;
return plansource;
}
extract_query_dependencies((Node *) querytree_list,
&plansource->relationOids,
&plansource->invalItems,
- &plansource->hasRowSecurity);
+ &plansource->dependsOnRLS);
+
+ /* Update RLS info as well. */
+ plansource->rewriteRoleId = GetUserId();
+ plansource->rewriteRowSecurity = row_security;
/*
* Also save the current search_path in the query_context. (This
plansource->cursor_options = cursor_options;
plansource->fixed_result = fixed_result;
plansource->resultDesc = PlanCacheComputeResultDesc(querytree_list);
- plansource->planUserId = GetUserId();
- plansource->row_security_env = row_security;
MemoryContextSwitchTo(oldcxt);
/*
* If the query is currently valid, we should have a saved search_path ---
* check to see if that matches the current environment. If not, we want
- * to force replan. We should also have a valid planUserId.
+ * to force replan.
*/
if (plansource->is_valid)
{
- Assert(OidIsValid(plansource->planUserId));
-
Assert(plansource->search_path != NULL);
if (!OverrideSearchPathMatchesCurrent(plansource->search_path))
{
}
/*
- * If the plan has a possible RLS dependency, force a replan if either the
- * role or the row_security setting has changed.
+ * If the query rewrite phase had a possible RLS dependency, we must redo
+ * it if either the role or the row_security setting has changed.
*/
- if (plansource->is_valid
- && plansource->hasRowSecurity
- && (plansource->planUserId != GetUserId()
- || plansource->row_security_env != row_security))
+ if (plansource->is_valid && plansource->dependsOnRLS &&
+ (plansource->rewriteRoleId != GetUserId() ||
+ plansource->rewriteRowSecurity != row_security))
plansource->is_valid = false;
- /*
- * If we have a join pushed down to the foreign server and the current
- * user is different from the one for which the plan was created,
- * invalidate the generic plan since user mapping for the new user might
- * make the join unsafe to push down, or change which user mapping is
- * used.
- */
- if (plansource->is_valid &&
- plansource->gplan &&
- plansource->gplan->has_foreign_join &&
- plansource->planUserId != GetUserId())
- plansource->gplan->is_valid = false;
-
/*
* If the query is currently valid, acquire locks on the referenced
* objects; then check again. We need to do it this way to cover the race
plansource->invalItems = NIL;
plansource->search_path = NULL;
- /*
- * The plan is invalid, possibly due to row security, so we need to reset
- * row_security_env and planUserId as we're about to re-plan with the
- * current settings.
- */
- plansource->row_security_env = row_security;
- plansource->planUserId = GetUserId();
-
/*
* Free the query_context. We don't really expect MemoryContextDelete to
* fail, but just in case, make sure the CachedPlanSource is left in a
extract_query_dependencies((Node *) qlist,
&plansource->relationOids,
&plansource->invalItems,
- &plansource->hasRowSecurity);
+ &plansource->dependsOnRLS);
+
+ /* Update RLS info as well. */
+ plansource->rewriteRoleId = GetUserId();
+ plansource->rewriteRowSecurity = row_security;
/*
* Also save the current search_path in the query_context. (This should
/* Generic plans are never one-shot */
Assert(!plan->is_oneshot);
+ /*
+ * If plan isn't valid for current role, we can't use it.
+ */
+ if (plan->is_valid && plan->dependsOnRole &&
+ plan->planRoleId != GetUserId())
+ plan->is_valid = false;
+
/*
* If it appears valid, acquire locks and recheck; this is much the same
* logic as in RevalidateCachedQuery, but for a plan.
List *plist;
bool snapshot_set;
bool spi_pushed;
+ bool is_transient;
MemoryContext plan_context;
MemoryContext oldcxt = CurrentMemoryContext;
ListCell *lc;
plan = (CachedPlan *) palloc(sizeof(CachedPlan));
plan->magic = CACHEDPLAN_MAGIC;
plan->stmt_list = plist;
- if (plan_list_is_transient(plist))
+
+ /*
+ * CachedPlan is dependent on role either if RLS affected the rewrite
+ * phase or if a role dependency was injected during planning. And it's
+ * transient if any plan is marked so.
+ */
+ plan->planRoleId = GetUserId();
+ plan->dependsOnRole = plansource->dependsOnRLS;
+ is_transient = false;
+ foreach(lc, plist)
+ {
+ PlannedStmt *plannedstmt = (PlannedStmt *) lfirst(lc);
+
+ if (!IsA(plannedstmt, PlannedStmt))
+ continue; /* Ignore utility statements */
+
+ if (plannedstmt->transientPlan)
+ is_transient = true;
+ if (plannedstmt->dependsOnRole)
+ plan->dependsOnRole = true;
+ }
+ if (is_transient)
{
Assert(TransactionIdIsNormal(TransactionXmin));
plan->saved_xmin = TransactionXmin;
plan->is_saved = false;
plan->is_valid = true;
- /*
- * Walk through the plist and set hasForeignJoin if any of the plans have
- * it set.
- */
- plan->has_foreign_join = false;
- foreach(lc, plist)
- {
- PlannedStmt *plan_stmt = (PlannedStmt *) lfirst(lc);
-
- if (IsA(plan_stmt, PlannedStmt))
- plan->has_foreign_join =
- plan->has_foreign_join || plan_stmt->hasForeignJoin;
- }
-
/* assign generation number to new plan */
plan->generation = ++(plansource->generation);
if (plansource->search_path)
newsource->search_path = CopyOverrideSearchPath(plansource->search_path);
newsource->query_context = querytree_context;
+ newsource->rewriteRoleId = plansource->rewriteRoleId;
+ newsource->rewriteRowSecurity = plansource->rewriteRowSecurity;
+ newsource->dependsOnRLS = plansource->dependsOnRLS;
newsource->gplan = NULL;
newsource->total_custom_cost = plansource->total_custom_cost;
newsource->num_custom_plans = plansource->num_custom_plans;
- /*
- * Copy over the user the query was planned as, and under what RLS
- * environment. We will check during RevalidateCachedQuery() if the user
- * or environment has changed and, if so, will force a re-plan.
- */
- newsource->planUserId = plansource->planUserId;
- newsource->row_security_env = plansource->row_security_env;
-
MemoryContextSwitchTo(oldcxt);
return newsource;
(void *) acquire);
}
-/*
- * plan_list_is_transient: check if any of the plans in the list are transient.
- */
-static bool
-plan_list_is_transient(List *stmt_list)
-{
- ListCell *lc;
-
- foreach(lc, stmt_list)
- {
- PlannedStmt *plannedstmt = (PlannedStmt *) lfirst(lc);
-
- if (!IsA(plannedstmt, PlannedStmt))
- continue; /* Ignore utility statements */
-
- if (plannedstmt->transientPlan)
- return true;
- }
-
- return false;
-}
-
/*
* PlanCacheComputeResultDesc: given a list of analyzed-and-rewritten Queries,
* determine the result tupledesc it will produce. Returns NULL if the
ResetPlanCache();
}
-/*
- * PlanCacheUserMappingCallback
- * Syscache inval callback function for user mapping cache invalidation.
- *
- * Invalidates plans which have pushed down foreign joins.
- */
-static void
-PlanCacheUserMappingCallback(Datum arg, int cacheid, uint32 hashvalue)
-{
- CachedPlanSource *plansource;
-
- for (plansource = first_saved_plan; plansource; plansource = plansource->next_saved)
- {
- Assert(plansource->magic == CACHEDPLANSOURCE_MAGIC);
-
- /* No work if it's already invalidated */
- if (!plansource->is_valid)
- continue;
-
- /* Never invalidate transaction control commands */
- if (IsTransactionStmtPlan(plansource))
- continue;
-
- /*
- * If the plan has pushed down foreign joins, those join may become
- * unsafe to push down because of user mapping changes. Invalidate
- * only the generic plan, since changes to user mapping do not
- * invalidate the parse tree.
- */
- if (plansource->gplan && plansource->gplan->has_foreign_join)
- plansource->gplan->is_valid = false;
- }
-}
-
/*
* ResetPlanCache: invalidate all cached plans.
*/
extern ForeignServer *GetForeignServer(Oid serverid);
extern ForeignServer *GetForeignServerByName(const char *name, bool missing_ok);
extern UserMapping *GetUserMapping(Oid userid, Oid serverid);
-extern Oid GetUserMappingId(Oid userid, Oid serverid, bool missing_ok);
+extern Oid GetUserMappingId(Oid userid, Oid serverid);
extern UserMapping *GetUserMappingById(Oid umid);
extern ForeignDataWrapper *GetForeignDataWrapper(Oid fdwid);
extern ForeignDataWrapper *GetForeignDataWrapperByName(const char *name,
bool hasRecursive; /* WITH RECURSIVE was specified */
bool hasModifyingCTE; /* has INSERT/UPDATE/DELETE in WITH */
bool hasForUpdate; /* FOR [KEY] UPDATE/SHARE was specified */
- bool hasRowSecurity; /* row security applied? */
+ bool hasRowSecurity; /* rewriter has applied some RLS policy */
List *cteList; /* WITH list (of CommonTableExpr's) */
VACOPT_FULL = 1 << 4, /* FULL (non-concurrent) vacuum */
VACOPT_NOWAIT = 1 << 5, /* don't wait to get lock (autovacuum only) */
VACOPT_SKIPTOAST = 1 << 6, /* don't process the TOAST table, if any */
- VACOPT_DISABLE_PAGE_SKIPPING = 1 << 7 /* don't skip any pages */
+ VACOPT_DISABLE_PAGE_SKIPPING = 1 << 7 /* don't skip any pages */
} VacuumOption;
typedef struct VacuumStmt
bool transientPlan; /* redo plan when TransactionXmin changes? */
+ bool dependsOnRole; /* is plan specific to current role? */
+
+ bool parallelModeNeeded; /* parallel mode required to execute? */
+
struct Plan *planTree; /* tree of Plan nodes */
List *rtable; /* list of RangeTblEntry nodes */
List *invalItems; /* other dependencies, as PlanInvalItems */
int nParamExec; /* number of PARAM_EXEC Params used */
-
- bool hasRowSecurity; /* row security applied? */
-
- bool parallelModeNeeded; /* parallel mode required to execute? */
- bool hasForeignJoin; /* Plan has a pushed down foreign join */
} PlannedStmt;
/* macro for fetching the Plan associated with a SubPlan node */
bool transientPlan; /* redo plan when TransactionXmin changes? */
- bool hasRowSecurity; /* row security applied? */
+ bool dependsOnRole; /* is plan specific to current role? */
bool parallelModeOK; /* parallel mode potentially OK? */
bool parallelModeNeeded; /* parallel mode actually required? */
-
- bool hasForeignJoin; /* does have a pushed down foreign join */
} PlannerGlobal;
/* macro for fetching the Plan associated with a SubPlan node */
* in just as for a baserel, except we don't bother with lateral_vars.
*
* If the relation is either a foreign table or a join of foreign tables that
- * all belong to the same foreign server and use the same user mapping, these
- * fields will be set:
+ * all belong to the same foreign server and are assigned to the same user to
+ * check access permissions as (cf checkAsUser), these fields will be set:
*
* serverid - OID of foreign server, if foreign table (else InvalidOid)
- * umid - OID of user mapping, if foreign table (else InvalidOid)
+ * userid - OID of user to check access as (InvalidOid means current user)
+ * useridiscurrent - we've assumed that userid equals current user
* fdwroutine - function hooks for FDW, if foreign table (else NULL)
* fdw_private - private state for FDW, if foreign table (else NULL)
*
/* Information about foreign tables and foreign joins */
Oid serverid; /* identifies server for the table or join */
- Oid umid; /* identifies user mapping for the table or
- * join */
+ Oid userid; /* identifies user to check access as */
+ bool useridiscurrent; /* join is only valid for current user */
/* use "struct FdwRoutine" to avoid including fdwapi.h here */
struct FdwRoutine *fdwroutine;
void *fdw_private;
struct EquivalenceClass *eclass[INDEX_MAX_KEYS];
/* List of non-EC RestrictInfos matching each column's condition */
List *rinfos[INDEX_MAX_KEYS];
-} ForeignKeyOptInfo;
+} ForeignKeyOptInfo;
/*
List *invalItems; /* other dependencies, as PlanInvalItems */
struct OverrideSearchPath *search_path; /* search_path used for
* parsing and planning */
- Oid planUserId; /* User-id that the plan depends on */
MemoryContext query_context; /* context holding the above, or NULL */
+ Oid rewriteRoleId; /* Role ID we did rewriting for */
+ bool rewriteRowSecurity; /* row_security used during rewrite */
+ bool dependsOnRLS; /* is rewritten query specific to the above? */
/* If we have a generic plan, this is a reference-counted link to it: */
struct CachedPlan *gplan; /* generic plan, or NULL if not valid */
/* Some state flags: */
double generic_cost; /* cost of generic plan, or -1 if not known */
double total_custom_cost; /* total cost of custom plans so far */
int num_custom_plans; /* number of plans included in total */
- bool hasRowSecurity; /* planned with row security? */
- bool row_security_env; /* row security setting when planned */
} CachedPlanSource;
/*
bool is_oneshot; /* is it a "oneshot" plan? */
bool is_saved; /* is CachedPlan in a long-lived context? */
bool is_valid; /* is the stmt_list currently valid? */
+ Oid planRoleId; /* Role ID the plan was created for */
+ bool dependsOnRole; /* is plan specific to that role? */
TransactionId saved_xmin; /* if valid, replan when TransactionXmin
* changes from this value */
int generation; /* parent's generation number for this plan */
int refcount; /* count of live references to this struct */
- bool has_foreign_join; /* plan has pushed down a foreign join */
MemoryContext context; /* context containing this CachedPlan */
} CachedPlan;
projects / postgresql / commitdiff