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|
SELECT * FROM pg_settings WHERE name LIKE 'enable%';
name | setting | unit | category | short_desc | extra_desc | context | vartype | source | min_val | max_val
-------------------+---------+------+---------------------------------------------+--------------------------------------------------------+------------+---------+---------+---------+---------+---------
enable_bitmapscan | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of bitmap-scan plans. | | user | bool | default | |
enable_hashagg | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of hashed aggregation plans. | | user | bool | default | |
enable_hashjoin | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of hash join plans. | | user | bool | default | |
enable_indexscan | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of index-scan plans. | | user | bool | default | |
enable_mergejoin | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of merge join plans. | | user | bool | default | |
enable_nestloop | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of nested-loop join plans. | | user | bool | default | |
enable_seqscan | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of sequential-scan plans. | | user | bool | default | |
enable_sort | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of explicit sort steps. | | user | bool | default | |
enable_tidscan | on | | Query Tuning / Planner Method Configuration | Enables the planner's use of TID scan plans. | | user | bool | default | |
(9 rows)
CREATE TABLE foo2(fooid int, f2 int);
INSERT INTO foo2 VALUES(1, 11);
INSERT INTO foo2 VALUES(2, 22);
INSERT INTO foo2 VALUES(1, 111);
CREATE FUNCTION foot(int) returns setof foo2 as '
"SELECT * FROM foo2 WHERE fooid = #{args[0]}"'
language 'plruby';
select * from foo2, foot(foo2.fooid) z where foo2.f2 = z.f2;
ERROR: function expression in FROM cannot refer to other relations of same query level
select * from foo2 where f2 in (
select f2 from foot(foo2.fooid) z where z.fooid = foo2.fooid
) ORDER BY 1,2;
fooid | f2
-------+-----
1 | 11
1 | 111
2 | 22
(3 rows)
select * from foo2 where f2 in (
select f2 from foot(1) z where z.fooid = foo2.fooid
) ORDER BY 1,2;
fooid | f2
-------+-----
1 | 11
1 | 111
(2 rows)
select * from foo2 where f2 in (
select f2 from foot(foo2.fooid) z where z.fooid = 1
) ORDER BY 1,2;
fooid | f2
-------+-----
1 | 11
1 | 111
(2 rows)
select foot.fooid, foot.f2 from foot(sin(pi()/2)::int) ORDER BY 1,2;
fooid | f2
-------+-----
1 | 11
1 | 111
(2 rows)
CREATE TABLE foo (fooid int, foosubid int, fooname text, primary key(fooid,foosubid));
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "foo_pkey" for table "foo"
INSERT INTO foo VALUES(1,1,'Joe');
INSERT INTO foo VALUES(1,2,'Ed');
INSERT INTO foo VALUES(2,1,'Mary');
CREATE FUNCTION getfoo(int) RETURNS int AS '
args[0]
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
t1
----
1
(1 row)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
getfoo
--------
1
(1 row)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof int AS '
"SELECT fooid FROM foo WHERE fooid = #{args[0]}"
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
t1
----
1
1
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
getfoo
--------
1
1
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof text AS '
"SELECT fooname FROM foo WHERE fooid = #{args[0]}"
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
t1
-----
Joe
Ed
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
getfoo
--------
Joe
Ed
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof foo AS '
"SELECT * FROM foo WHERE fooid = #{args[0]}"
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof record AS '
"SELECT * FROM foo WHERE fooid = #{args[0]}"
' language 'plruby';
SELECT * FROM getfoo(1) AS t1(fooid int, foosubid int, fooname text);
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1) AS (fooid int, foosubid int, fooname text);
SELECT * FROM vw_getfoo;
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof int AS '
PL.exec("SELECT fooid FROM foo WHERE fooid = #{args[0]}") do |row|
yield row.values
end
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
t1
----
1
1
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
getfoo
--------
1
1
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
CREATE FUNCTION getfoo(int) RETURNS setof foo AS '
PL.exec("SELECT * FROM foo WHERE fooid = #{args[0]}", nil, "value") do |r|
yield r
end
' language 'plruby';
SELECT * FROM getfoo(1) AS t1;
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
CREATE VIEW vw_getfoo AS SELECT * FROM getfoo(1);
SELECT * FROM vw_getfoo;
fooid | foosubid | fooname
-------+----------+---------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
DROP VIEW vw_getfoo;
DROP FUNCTION getfoo(int);
DROP FUNCTION foot(int);
DROP TABLE foo2;
DROP TABLE foo;
CREATE TABLE foorescan (fooid int, foosubid int, fooname text, primary key(fooid,foosubid));
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "foorescan_pkey" for table "foorescan"
INSERT INTO foorescan values(5000,1,'abc.5000.1');
INSERT INTO foorescan values(5001,1,'abc.5001.1');
INSERT INTO foorescan values(5002,1,'abc.5002.1');
INSERT INTO foorescan values(5003,1,'abc.5003.1');
INSERT INTO foorescan values(5004,1,'abc.5004.1');
INSERT INTO foorescan values(5005,1,'abc.5005.1');
INSERT INTO foorescan values(5006,1,'abc.5006.1');
INSERT INTO foorescan values(5007,1,'abc.5007.1');
INSERT INTO foorescan values(5008,1,'abc.5008.1');
INSERT INTO foorescan values(5009,1,'abc.5009.1');
INSERT INTO foorescan values(5000,2,'abc.5000.2');
INSERT INTO foorescan values(5001,2,'abc.5001.2');
INSERT INTO foorescan values(5002,2,'abc.5002.2');
INSERT INTO foorescan values(5003,2,'abc.5003.2');
INSERT INTO foorescan values(5004,2,'abc.5004.2');
INSERT INTO foorescan values(5005,2,'abc.5005.2');
INSERT INTO foorescan values(5006,2,'abc.5006.2');
INSERT INTO foorescan values(5007,2,'abc.5007.2');
INSERT INTO foorescan values(5008,2,'abc.5008.2');
INSERT INTO foorescan values(5009,2,'abc.5009.2');
INSERT INTO foorescan values(5000,3,'abc.5000.3');
INSERT INTO foorescan values(5001,3,'abc.5001.3');
INSERT INTO foorescan values(5002,3,'abc.5002.3');
INSERT INTO foorescan values(5003,3,'abc.5003.3');
INSERT INTO foorescan values(5004,3,'abc.5004.3');
INSERT INTO foorescan values(5005,3,'abc.5005.3');
INSERT INTO foorescan values(5006,3,'abc.5006.3');
INSERT INTO foorescan values(5007,3,'abc.5007.3');
INSERT INTO foorescan values(5008,3,'abc.5008.3');
INSERT INTO foorescan values(5009,3,'abc.5009.3');
INSERT INTO foorescan values(5000,4,'abc.5000.4');
INSERT INTO foorescan values(5001,4,'abc.5001.4');
INSERT INTO foorescan values(5002,4,'abc.5002.4');
INSERT INTO foorescan values(5003,4,'abc.5003.4');
INSERT INTO foorescan values(5004,4,'abc.5004.4');
INSERT INTO foorescan values(5005,4,'abc.5005.4');
INSERT INTO foorescan values(5006,4,'abc.5006.4');
INSERT INTO foorescan values(5007,4,'abc.5007.4');
INSERT INTO foorescan values(5008,4,'abc.5008.4');
INSERT INTO foorescan values(5009,4,'abc.5009.4');
INSERT INTO foorescan values(5000,5,'abc.5000.5');
INSERT INTO foorescan values(5001,5,'abc.5001.5');
INSERT INTO foorescan values(5002,5,'abc.5002.5');
INSERT INTO foorescan values(5003,5,'abc.5003.5');
INSERT INTO foorescan values(5004,5,'abc.5004.5');
INSERT INTO foorescan values(5005,5,'abc.5005.5');
INSERT INTO foorescan values(5006,5,'abc.5006.5');
INSERT INTO foorescan values(5007,5,'abc.5007.5');
INSERT INTO foorescan values(5008,5,'abc.5008.5');
INSERT INTO foorescan values(5009,5,'abc.5009.5');
CREATE FUNCTION foorescan(int,int) RETURNS setof foorescan AS '
"SELECT * FROM foorescan WHERE fooid >= #{args[0]} and fooid < #{args[1]}"
' language 'plruby';
SELECT * FROM foorescan f WHERE f.fooid IN (
SELECT fooid FROM foorescan(5002,5004)
) ORDER BY 1,2;
fooid | foosubid | fooname
-------+----------+------------
5002 | 1 | abc.5002.1
5002 | 2 | abc.5002.2
5002 | 3 | abc.5002.3
5002 | 4 | abc.5002.4
5002 | 5 | abc.5002.5
5003 | 1 | abc.5003.1
5003 | 2 | abc.5003.2
5003 | 3 | abc.5003.3
5003 | 4 | abc.5003.4
5003 | 5 | abc.5003.5
(10 rows)
CREATE VIEW vw_foorescan AS SELECT * FROM foorescan(5002,5004);
SELECT * FROM foorescan f WHERE f.fooid IN (
SELECT fooid FROM vw_foorescan
) ORDER BY 1,2;
fooid | foosubid | fooname
-------+----------+------------
5002 | 1 | abc.5002.1
5002 | 2 | abc.5002.2
5002 | 3 | abc.5002.3
5002 | 4 | abc.5002.4
5002 | 5 | abc.5002.5
5003 | 1 | abc.5003.1
5003 | 2 | abc.5003.2
5003 | 3 | abc.5003.3
5003 | 4 | abc.5003.4
5003 | 5 | abc.5003.5
(10 rows)
CREATE TABLE barrescan (fooid int primary key);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "barrescan_pkey" for table "barrescan"
INSERT INTO barrescan values(5003);
INSERT INTO barrescan values(5004);
INSERT INTO barrescan values(5005);
INSERT INTO barrescan values(5006);
INSERT INTO barrescan values(5007);
INSERT INTO barrescan values(5008);
CREATE FUNCTION foorescan(int) RETURNS setof foorescan AS '
"SELECT * FROM foorescan WHERE fooid = #{args[0]}"
' language 'plruby';
SELECT f.* FROM barrescan b, foorescan f
WHERE f.fooid = b.fooid AND b.fooid IN (
SELECT fooid FROM foorescan(b.fooid)
) ORDER BY 1,2;
fooid | foosubid | fooname
-------+----------+------------
5003 | 1 | abc.5003.1
5003 | 2 | abc.5003.2
5003 | 3 | abc.5003.3
5003 | 4 | abc.5003.4
5003 | 5 | abc.5003.5
5004 | 1 | abc.5004.1
5004 | 2 | abc.5004.2
5004 | 3 | abc.5004.3
5004 | 4 | abc.5004.4
5004 | 5 | abc.5004.5
5005 | 1 | abc.5005.1
5005 | 2 | abc.5005.2
5005 | 3 | abc.5005.3
5005 | 4 | abc.5005.4
5005 | 5 | abc.5005.5
5006 | 1 | abc.5006.1
5006 | 2 | abc.5006.2
5006 | 3 | abc.5006.3
5006 | 4 | abc.5006.4
5006 | 5 | abc.5006.5
5007 | 1 | abc.5007.1
5007 | 2 | abc.5007.2
5007 | 3 | abc.5007.3
5007 | 4 | abc.5007.4
5007 | 5 | abc.5007.5
5008 | 1 | abc.5008.1
5008 | 2 | abc.5008.2
5008 | 3 | abc.5008.3
5008 | 4 | abc.5008.4
5008 | 5 | abc.5008.5
(30 rows)
SELECT b.fooid, max(f.foosubid) FROM barrescan b, foorescan f
WHERE f.fooid = b.fooid AND b.fooid IN (
SELECT fooid FROM foorescan(b.fooid)
) GROUP BY b.fooid ORDER BY 1,2;
fooid | max
-------+-----
5003 | 5
5004 | 5
5005 | 5
5006 | 5
5007 | 5
5008 | 5
(6 rows)
CREATE VIEW fooview1 AS SELECT f.* FROM barrescan b, foorescan f
WHERE f.fooid = b.fooid AND b.fooid IN (
SELECT fooid FROM foorescan(b.fooid)
) ORDER BY 1,2;
SELECT * FROM fooview1 AS fv WHERE fv.fooid = 5004;
fooid | foosubid | fooname
-------+----------+------------
5004 | 1 | abc.5004.1
5004 | 2 | abc.5004.2
5004 | 3 | abc.5004.3
5004 | 4 | abc.5004.4
5004 | 5 | abc.5004.5
(5 rows)
CREATE VIEW fooview2 AS SELECT b.fooid, max(f.foosubid) AS maxsubid
FROM barrescan b, foorescan f WHERE f.fooid = b.fooid AND b.fooid IN (
SELECT fooid FROM foorescan(b.fooid)
) GROUP BY b.fooid ORDER BY 1,2;
SELECT * FROM fooview2 AS fv WHERE fv.maxsubid = 5;
fooid | maxsubid
-------+----------
5003 | 5
5004 | 5
5005 | 5
5006 | 5
5007 | 5
5008 | 5
(6 rows)
DROP VIEW vw_foorescan;
DROP VIEW fooview1;
DROP VIEW fooview2;
DROP FUNCTION foorescan(int,int);
DROP FUNCTION foorescan(int);
DROP TABLE foorescan;
DROP TABLE barrescan;
|
