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913bbd88dc
postgresql/src/test/regress/expected/rangefuncs.out
Tom Lane 913bbd88dc Improve the handling of result type coercions in SQL functions. 
Use the parser's standard type coercion machinery to convert the
output column(s) of a SQL function's final SELECT or RETURNING
to the type(s) they should have according to the function's declared
result type.  We'll allow any case where an assignment-level
coercion is available.  Previously, we failed unless the required
coercion was a binary-compatible one (and the documentation ignored
this, falsely claiming that the types must match exactly).

Notably, the coercion now accounts for typmods, so that cases where
a SQL function is declared to return a composite type whose columns
are typmod-constrained now behave as one would expect.  Arguably
this aspect is a bug fix, but the overall behavioral change here
seems too large to consider back-patching.

A nice side-effect is that functions can now be inlined in a
few cases where we previously failed to do so because of type
mismatches.

Discussion: https://postgr.es/m/18929.1574895430@sss.pgh.pa.us
2020-01-08 11:07:59 -05:00

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CREATE TABLE rngfunc2(rngfuncid int, f2 int);
INSERT INTO rngfunc2 VALUES(1, 11);
INSERT INTO rngfunc2 VALUES(2, 22);
INSERT INTO rngfunc2 VALUES(1, 111);
CREATE FUNCTION rngfunct(int) returns setof rngfunc2 as 'SELECT * FROM rngfunc2 WHERE rngfuncid = $1 ORDER BY f2;' LANGUAGE SQL;
-- function with ORDINALITY
select * from rngfunct(1) with ordinality as z(a,b,ord);
a | b | ord
---+-----+-----
1 | 11 | 1
1 | 111 | 2
(2 rows)
select * from rngfunct(1) with ordinality as z(a,b,ord) where b > 100; -- ordinal 2, not 1
a | b | ord
---+-----+-----
1 | 111 | 2
(1 row)
-- ordinality vs. column names and types
select a,b,ord from rngfunct(1) with ordinality as z(a,b,ord);
a | b | ord
---+-----+-----
1 | 11 | 1
1 | 111 | 2
(2 rows)
select a,ord from unnest(array['a','b']) with ordinality as z(a,ord);
a | ord
---+-----
a | 1
b | 2
(2 rows)
select * from unnest(array['a','b']) with ordinality as z(a,ord);
a | ord
---+-----
a | 1
b | 2
(2 rows)
select a,ord from unnest(array[1.0::float8]) with ordinality as z(a,ord);
a | ord
---+-----
1 | 1
(1 row)
select * from unnest(array[1.0::float8]) with ordinality as z(a,ord);
a | ord
---+-----
1 | 1
(1 row)
select row_to_json(s.*) from generate_series(11,14) with ordinality s;
row_to_json
-------------------------
{"s":11,"ordinality":1}
{"s":12,"ordinality":2}
{"s":13,"ordinality":3}
{"s":14,"ordinality":4}
(4 rows)
-- ordinality vs. views
create temporary view vw_ord as select * from (values (1)) v(n) join rngfunct(1) with ordinality as z(a,b,ord) on (n=ord);
select * from vw_ord;
n | a | b | ord
---+---+----+-----
1 | 1 | 11 | 1
(1 row)
select definition from pg_views where viewname='vw_ord';
definition
-------------------------------------------------------------------------
SELECT v.n, +
z.a, +
z.b, +
z.ord +
FROM (( VALUES (1)) v(n) +
JOIN rngfunct(1) WITH ORDINALITY z(a, b, ord) ON ((v.n = z.ord)));
(1 row)
drop view vw_ord;
-- multiple functions
select * from rows from(rngfunct(1),rngfunct(2)) with ordinality as z(a,b,c,d,ord);
a | b | c | d | ord
---+-----+---+----+-----
1 | 11 | 2 | 22 | 1
1 | 111 | | | 2
(2 rows)
create temporary view vw_ord as select * from (values (1)) v(n) join rows from(rngfunct(1),rngfunct(2)) with ordinality as z(a,b,c,d,ord) on (n=ord);
select * from vw_ord;
n | a | b | c | d | ord
---+---+----+---+----+-----
1 | 1 | 11 | 2 | 22 | 1
(1 row)
select definition from pg_views where viewname='vw_ord';
definition
-------------------------------------------------------------------------------------------------------
SELECT v.n, +
z.a, +
z.b, +
z.c, +
z.d, +
z.ord +
FROM (( VALUES (1)) v(n) +
JOIN ROWS FROM(rngfunct(1), rngfunct(2)) WITH ORDINALITY z(a, b, c, d, ord) ON ((v.n = z.ord)));
(1 row)
drop view vw_ord;
-- expansions of unnest()
select * from unnest(array[10,20],array['foo','bar'],array[1.0]);
unnest | unnest | unnest
--------+--------+--------
10 | foo | 1.0
20 | bar |
(2 rows)
select * from unnest(array[10,20],array['foo','bar'],array[1.0]) with ordinality as z(a,b,c,ord);
a | b | c | ord
----+-----+-----+-----
10 | foo | 1.0 | 1
20 | bar | | 2
(2 rows)
select * from rows from(unnest(array[10,20],array['foo','bar'],array[1.0])) with ordinality as z(a,b,c,ord);
a | b | c | ord
----+-----+-----+-----
10 | foo | 1.0 | 1
20 | bar | | 2
(2 rows)
select * from rows from(unnest(array[10,20],array['foo','bar']), generate_series(101,102)) with ordinality as z(a,b,c,ord);
a | b | c | ord
----+-----+-----+-----
10 | foo | 101 | 1
20 | bar | 102 | 2
(2 rows)
create temporary view vw_ord as select * from unnest(array[10,20],array['foo','bar'],array[1.0]) as z(a,b,c);
select * from vw_ord;
a | b | c
----+-----+-----
10 | foo | 1.0
20 | bar |
(2 rows)
select definition from pg_views where viewname='vw_ord';
definition
----------------------------------------------------------------------------------------
SELECT z.a, +
z.b, +
z.c +
FROM UNNEST(ARRAY[10, 20], ARRAY['foo'::text, 'bar'::text], ARRAY[1.0]) z(a, b, c);
(1 row)
drop view vw_ord;
create temporary view vw_ord as select * from rows from(unnest(array[10,20],array['foo','bar'],array[1.0])) as z(a,b,c);
select * from vw_ord;
a | b | c
----+-----+-----
10 | foo | 1.0
20 | bar |
(2 rows)
select definition from pg_views where viewname='vw_ord';
definition
----------------------------------------------------------------------------------------
SELECT z.a, +
z.b, +
z.c +
FROM UNNEST(ARRAY[10, 20], ARRAY['foo'::text, 'bar'::text], ARRAY[1.0]) z(a, b, c);
(1 row)
drop view vw_ord;
create temporary view vw_ord as select * from rows from(unnest(array[10,20],array['foo','bar']), generate_series(1,2)) as z(a,b,c);
select * from vw_ord;
a | b | c
----+-----+---
10 | foo | 1
20 | bar | 2
(2 rows)
select definition from pg_views where viewname='vw_ord';
definition
----------------------------------------------------------------------------------------------------------------------
SELECT z.a, +
z.b, +
z.c +
FROM ROWS FROM(unnest(ARRAY[10, 20]), unnest(ARRAY['foo'::text, 'bar'::text]), generate_series(1, 2)) z(a, b, c);
(1 row)
drop view vw_ord;
-- ordinality and multiple functions vs. rewind and reverse scan
begin;
declare rf_cur scroll cursor for select * from rows from(generate_series(1,5),generate_series(1,2)) with ordinality as g(i,j,o);
fetch all from rf_cur;
i | j | o
---+---+---
1 | 1 | 1
2 | 2 | 2
3 | | 3
4 | | 4
5 | | 5
(5 rows)
fetch backward all from rf_cur;
i | j | o
---+---+---
5 | | 5
4 | | 4
3 | | 3
2 | 2 | 2
1 | 1 | 1
(5 rows)
fetch all from rf_cur;
i | j | o
---+---+---
1 | 1 | 1
2 | 2 | 2
3 | | 3
4 | | 4
5 | | 5
(5 rows)
fetch next from rf_cur;
i | j | o
---+---+---
(0 rows)
fetch next from rf_cur;
i | j | o
---+---+---
(0 rows)
fetch prior from rf_cur;
i | j | o
---+---+---
5 | | 5
(1 row)
fetch absolute 1 from rf_cur;
i | j | o
---+---+---
1 | 1 | 1
(1 row)
fetch next from rf_cur;
i | j | o
---+---+---
2 | 2 | 2
(1 row)
fetch next from rf_cur;
i | j | o
---+---+---
3 | | 3
(1 row)
fetch next from rf_cur;
i | j | o
---+---+---
4 | | 4
(1 row)
fetch prior from rf_cur;
i | j | o
---+---+---
3 | | 3
(1 row)
fetch prior from rf_cur;
i | j | o
---+---+---
2 | 2 | 2
(1 row)
fetch prior from rf_cur;
i | j | o
---+---+---
1 | 1 | 1
(1 row)
commit;
-- function with implicit LATERAL
select * from rngfunc2, rngfunct(rngfunc2.rngfuncid) z where rngfunc2.f2 = z.f2;
rngfuncid | f2 | rngfuncid | f2
-----------+-----+-----------+-----
1 | 11 | 1 | 11
2 | 22 | 2 | 22
1 | 111 | 1 | 111
(3 rows)
-- function with implicit LATERAL and explicit ORDINALITY
select * from rngfunc2, rngfunct(rngfunc2.rngfuncid) with ordinality as z(rngfuncid,f2,ord) where rngfunc2.f2 = z.f2;
rngfuncid | f2 | rngfuncid | f2 | ord
-----------+-----+-----------+-----+-----
1 | 11 | 1 | 11 | 1
2 | 22 | 2 | 22 | 1
1 | 111 | 1 | 111 | 2
(3 rows)
-- function in subselect
select * from rngfunc2 where f2 in (select f2 from rngfunct(rngfunc2.rngfuncid) z where z.rngfuncid = rngfunc2.rngfuncid) ORDER BY 1,2;
rngfuncid | f2
-----------+-----
1 | 11
1 | 111
2 | 22
(3 rows)
-- function in subselect
select * from rngfunc2 where f2 in (select f2 from rngfunct(1) z where z.rngfuncid = rngfunc2.rngfuncid) ORDER BY 1,2;
rngfuncid | f2
-----------+-----
1 | 11
1 | 111
(2 rows)
-- function in subselect
select * from rngfunc2 where f2 in (select f2 from rngfunct(rngfunc2.rngfuncid) z where z.rngfuncid = 1) ORDER BY 1,2;
rngfuncid | f2
-----------+-----
1 | 11
1 | 111
(2 rows)
-- nested functions
select rngfunct.rngfuncid, rngfunct.f2 from rngfunct(sin(pi()/2)::int) ORDER BY 1,2;
rngfuncid | f2
-----------+-----
1 | 11
1 | 111
(2 rows)
CREATE TABLE rngfunc (rngfuncid int, rngfuncsubid int, rngfuncname text, primary key(rngfuncid,rngfuncsubid));
INSERT INTO rngfunc VALUES(1,1,'Joe');
INSERT INTO rngfunc VALUES(1,2,'Ed');
INSERT INTO rngfunc VALUES(2,1,'Mary');
-- sql, proretset = f, prorettype = b
CREATE FUNCTION getrngfunc1(int) RETURNS int AS 'SELECT $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc1(1) AS t1;
t1
----
1
(1 row)
SELECT * FROM getrngfunc1(1) WITH ORDINALITY AS t1(v,o);
v | o
---+---
1 | 1
(1 row)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc1(1);
SELECT * FROM vw_getrngfunc;
getrngfunc1
-------------
1
(1 row)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc1(1) WITH ORDINALITY as t1(v,o);
SELECT * FROM vw_getrngfunc;
v | o
---+---
1 | 1
(1 row)
DROP VIEW vw_getrngfunc;
-- sql, proretset = t, prorettype = b
CREATE FUNCTION getrngfunc2(int) RETURNS setof int AS 'SELECT rngfuncid FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc2(1) AS t1;
t1
----
1
1
(2 rows)
SELECT * FROM getrngfunc2(1) WITH ORDINALITY AS t1(v,o);
v | o
---+---
1 | 1
1 | 2
(2 rows)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc2(1);
SELECT * FROM vw_getrngfunc;
getrngfunc2
-------------
1
1
(2 rows)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc2(1) WITH ORDINALITY AS t1(v,o);
SELECT * FROM vw_getrngfunc;
v | o
---+---
1 | 1
1 | 2
(2 rows)
DROP VIEW vw_getrngfunc;
-- sql, proretset = t, prorettype = b
CREATE FUNCTION getrngfunc3(int) RETURNS setof text AS 'SELECT rngfuncname FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc3(1) AS t1;
t1
-----
Joe
Ed
(2 rows)
SELECT * FROM getrngfunc3(1) WITH ORDINALITY AS t1(v,o);
v | o
-----+---
Joe | 1
Ed | 2
(2 rows)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc3(1);
SELECT * FROM vw_getrngfunc;
getrngfunc3
-------------
Joe
Ed
(2 rows)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc3(1) WITH ORDINALITY AS t1(v,o);
SELECT * FROM vw_getrngfunc;
v | o
-----+---
Joe | 1
Ed | 2
(2 rows)
DROP VIEW vw_getrngfunc;
-- sql, proretset = f, prorettype = c
CREATE FUNCTION getrngfunc4(int) RETURNS rngfunc AS 'SELECT * FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc4(1) AS t1;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
SELECT * FROM getrngfunc4(1) WITH ORDINALITY AS t1(a,b,c,o);
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
(1 row)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc4(1);
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc4(1) WITH ORDINALITY AS t1(a,b,c,o);
SELECT * FROM vw_getrngfunc;
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
(1 row)
DROP VIEW vw_getrngfunc;
-- sql, proretset = t, prorettype = c
CREATE FUNCTION getrngfunc5(int) RETURNS setof rngfunc AS 'SELECT * FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc5(1) AS t1;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
SELECT * FROM getrngfunc5(1) WITH ORDINALITY AS t1(a,b,c,o);
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
1 | 2 | Ed | 2
(2 rows)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc5(1);
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc5(1) WITH ORDINALITY AS t1(a,b,c,o);
SELECT * FROM vw_getrngfunc;
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
1 | 2 | Ed | 2
(2 rows)
DROP VIEW vw_getrngfunc;
-- sql, proretset = f, prorettype = record
CREATE FUNCTION getrngfunc6(int) RETURNS RECORD AS 'SELECT * FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc6(1) AS t1(rngfuncid int, rngfuncsubid int, rngfuncname text);
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
SELECT * FROM ROWS FROM( getrngfunc6(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text) ) WITH ORDINALITY;
rngfuncid | rngfuncsubid | rngfuncname | ordinality
-----------+--------------+-------------+------------
1 | 1 | Joe | 1
(1 row)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc6(1) AS
(rngfuncid int, rngfuncsubid int, rngfuncname text);
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS
SELECT * FROM ROWS FROM( getrngfunc6(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text) )
WITH ORDINALITY;
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname | ordinality
-----------+--------------+-------------+------------
1 | 1 | Joe | 1
(1 row)
DROP VIEW vw_getrngfunc;
-- sql, proretset = t, prorettype = record
CREATE FUNCTION getrngfunc7(int) RETURNS setof record AS 'SELECT * FROM rngfunc WHERE rngfuncid = $1;' LANGUAGE SQL;
SELECT * FROM getrngfunc7(1) AS t1(rngfuncid int, rngfuncsubid int, rngfuncname text);
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
SELECT * FROM ROWS FROM( getrngfunc7(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text) ) WITH ORDINALITY;
rngfuncid | rngfuncsubid | rngfuncname | ordinality
-----------+--------------+-------------+------------
1 | 1 | Joe | 1
1 | 2 | Ed | 2
(2 rows)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc7(1) AS
(rngfuncid int, rngfuncsubid int, rngfuncname text);
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
1 | 2 | Ed
(2 rows)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS
SELECT * FROM ROWS FROM( getrngfunc7(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text) )
WITH ORDINALITY;
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname | ordinality
-----------+--------------+-------------+------------
1 | 1 | Joe | 1
1 | 2 | Ed | 2
(2 rows)
DROP VIEW vw_getrngfunc;
-- plpgsql, proretset = f, prorettype = b
CREATE FUNCTION getrngfunc8(int) RETURNS int AS 'DECLARE rngfuncint int; BEGIN SELECT rngfuncid into rngfuncint FROM rngfunc WHERE rngfuncid = $1; RETURN rngfuncint; END;' LANGUAGE plpgsql;
SELECT * FROM getrngfunc8(1) AS t1;
t1
----
1
(1 row)
SELECT * FROM getrngfunc8(1) WITH ORDINALITY AS t1(v,o);
v | o
---+---
1 | 1
(1 row)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc8(1);
SELECT * FROM vw_getrngfunc;
getrngfunc8
-------------
1
(1 row)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc8(1) WITH ORDINALITY AS t1(v,o);
SELECT * FROM vw_getrngfunc;
v | o
---+---
1 | 1
(1 row)
DROP VIEW vw_getrngfunc;
-- plpgsql, proretset = f, prorettype = c
CREATE FUNCTION getrngfunc9(int) RETURNS rngfunc AS 'DECLARE rngfunctup rngfunc%ROWTYPE; BEGIN SELECT * into rngfunctup FROM rngfunc WHERE rngfuncid = $1; RETURN rngfunctup; END;' LANGUAGE plpgsql;
SELECT * FROM getrngfunc9(1) AS t1;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
SELECT * FROM getrngfunc9(1) WITH ORDINALITY AS t1(a,b,c,o);
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
(1 row)
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc9(1);
SELECT * FROM vw_getrngfunc;
rngfuncid | rngfuncsubid | rngfuncname
-----------+--------------+-------------
1 | 1 | Joe
(1 row)
DROP VIEW vw_getrngfunc;
CREATE VIEW vw_getrngfunc AS SELECT * FROM getrngfunc9(1) WITH ORDINALITY AS t1(a,b,c,o);
SELECT * FROM vw_getrngfunc;
a | b | c | o
---+---+-----+---
1 | 1 | Joe | 1
(1 row)
DROP VIEW vw_getrngfunc;
-- mix 'n match kinds, to exercise expandRTE and related logic
select * from rows from(getrngfunc1(1),getrngfunc2(1),getrngfunc3(1),getrngfunc4(1),getrngfunc5(1),
getrngfunc6(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text),
getrngfunc7(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text),
getrngfunc8(1),getrngfunc9(1))
with ordinality as t1(a,b,c,d,e,f,g,h,i,j,k,l,m,o,p,q,r,s,t,u);
a | b | c | d | e | f | g | h | i | j | k | l | m | o | p | q | r | s | t | u
---+---+-----+---+---+-----+---+---+-----+---+---+-----+---+---+-----+---+---+---+-----+---
1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | 1 | Joe | 1
| 1 | Ed | | | | 1 | 2 | Ed | | | | 1 | 2 | Ed | | | | | 2
(2 rows)
select * from rows from(getrngfunc9(1),getrngfunc8(1),
getrngfunc7(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text),
getrngfunc6(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text),
getrngfunc5(1),getrngfunc4(1),getrngfunc3(1),getrngfunc2(1),getrngfunc1(1))
with ordinality as t1(a,b,c,d,e,f,g,h,i,j,k,l,m,o,p,q,r,s,t,u);
a | b | c | d | e | f | g | h | i | j | k | l | m | o | p | q | r | s | t | u
---+---+-----+---+---+---+-----+---+---+-----+---+---+-----+---+---+-----+-----+---+---+---
1 | 1 | Joe | 1 | 1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | Joe | 1 | 1 | Joe | Joe | 1 | 1 | 1
| | | | 1 | 2 | Ed | | | | 1 | 2 | Ed | | | | Ed | 1 | | 2
(2 rows)
create temporary view vw_rngfunc as
select * from rows from(getrngfunc9(1),
getrngfunc7(1) AS (rngfuncid int, rngfuncsubid int, rngfuncname text),
getrngfunc1(1))
with ordinality as t1(a,b,c,d,e,f,g,n);
select * from vw_rngfunc;
a | b | c | d | e | f | g | n
---+---+-----+---+---+-----+---+---
1 | 1 | Joe | 1 | 1 | Joe | 1 | 1
| | | 1 | 2 | Ed | | 2
(2 rows)
select pg_get_viewdef('vw_rngfunc');
pg_get_viewdef
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SELECT t1.a, +
t1.b, +
t1.c, +
t1.d, +
t1.e, +
t1.f, +
t1.g, +
t1.n +
FROM ROWS FROM(getrngfunc9(1), getrngfunc7(1) AS (rngfuncid integer, rngfuncsubid integer, rngfuncname text), getrngfunc1(1)) WITH ORDINALITY t1(a, b, c, d, e, f, g, n);
(1 row)
drop view vw_rngfunc;
DROP FUNCTION getrngfunc1(int);
DROP FUNCTION getrngfunc2(int);
DROP FUNCTION getrngfunc3(int);
DROP FUNCTION getrngfunc4(int);
DROP FUNCTION getrngfunc5(int);
DROP FUNCTION getrngfunc6(int);
DROP FUNCTION getrngfunc7(int);
DROP FUNCTION getrngfunc8(int);
DROP FUNCTION getrngfunc9(int);
DROP FUNCTION rngfunct(int);
DROP TABLE rngfunc2;
DROP TABLE rngfunc;
-- Rescan tests --
CREATE TEMPORARY SEQUENCE rngfunc_rescan_seq1;
CREATE TEMPORARY SEQUENCE rngfunc_rescan_seq2;
CREATE TYPE rngfunc_rescan_t AS (i integer, s bigint);
CREATE FUNCTION rngfunc_sql(int,int) RETURNS setof rngfunc_rescan_t AS 'SELECT i, nextval(''rngfunc_rescan_seq1'') FROM generate_series($1,$2) i;' LANGUAGE SQL;
-- plpgsql functions use materialize mode
CREATE FUNCTION rngfunc_mat(int,int) RETURNS setof rngfunc_rescan_t AS 'begin for i in $1..$2 loop return next (i, nextval(''rngfunc_rescan_seq2'')); end loop; end;' LANGUAGE plpgsql;
--invokes ExecReScanFunctionScan - all these cases should materialize the function only once
-- LEFT JOIN on a condition that the planner can't prove to be true is used to ensure the function
-- is on the inner path of a nestloop join
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN rngfunc_sql(11,13) ON (r+i)<100;
r | i | s
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
2 | 11 | 1
2 | 12 | 2
2 | 13 | 3
3 | 11 | 1
3 | 12 | 2
3 | 13 | 3
(9 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN rngfunc_sql(11,13) WITH ORDINALITY AS f(i,s,o) ON (r+i)<100;
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
1 | 12 | 2 | 2
1 | 13 | 3 | 3
2 | 11 | 1 | 1
2 | 12 | 2 | 2
2 | 13 | 3 | 3
3 | 11 | 1 | 1
3 | 12 | 2 | 2
3 | 13 | 3 | 3
(9 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN rngfunc_mat(11,13) ON (r+i)<100;
r | i | s
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
2 | 11 | 1
2 | 12 | 2
2 | 13 | 3
3 | 11 | 1
3 | 12 | 2
3 | 13 | 3
(9 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN rngfunc_mat(11,13) WITH ORDINALITY AS f(i,s,o) ON (r+i)<100;
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
1 | 12 | 2 | 2
1 | 13 | 3 | 3
2 | 11 | 1 | 1
2 | 12 | 2 | 2
2 | 13 | 3 | 3
3 | 11 | 1 | 1
3 | 12 | 2 | 2
3 | 13 | 3 | 3
(9 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN ROWS FROM( rngfunc_sql(11,13), rngfunc_mat(11,13) ) WITH ORDINALITY AS f(i1,s1,i2,s2,o) ON (r+i1+i2)<100;
r | i1 | s1 | i2 | s2 | o
---+----+----+----+----+---
1 | 11 | 1 | 11 | 1 | 1
1 | 12 | 2 | 12 | 2 | 2
1 | 13 | 3 | 13 | 3 | 3
2 | 11 | 1 | 11 | 1 | 1
2 | 12 | 2 | 12 | 2 | 2
2 | 13 | 3 | 13 | 3 | 3
3 | 11 | 1 | 11 | 1 | 1
3 | 12 | 2 | 12 | 2 | 2
3 | 13 | 3 | 13 | 3 | 3
(9 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN generate_series(11,13) f(i) ON (r+i)<100;
r | i
---+----
1 | 11
1 | 12
1 | 13
2 | 11
2 | 12
2 | 13
3 | 11
3 | 12
3 | 13
(9 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN generate_series(11,13) WITH ORDINALITY AS f(i,o) ON (r+i)<100;
r | i | o
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
2 | 11 | 1
2 | 12 | 2
2 | 13 | 3
3 | 11 | 1
3 | 12 | 2
3 | 13 | 3
(9 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN unnest(array[10,20,30]) f(i) ON (r+i)<100;
r | i
---+----
1 | 10
1 | 20
1 | 30
2 | 10
2 | 20
2 | 30
3 | 10
3 | 20
3 | 30
(9 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r) LEFT JOIN unnest(array[10,20,30]) WITH ORDINALITY AS f(i,o) ON (r+i)<100;
r | i | o
---+----+---
1 | 10 | 1
1 | 20 | 2
1 | 30 | 3
2 | 10 | 1
2 | 20 | 2
2 | 30 | 3
3 | 10 | 1
3 | 20 | 2
3 | 30 | 3
(9 rows)
--invokes ExecReScanFunctionScan with chgParam != NULL (using implied LATERAL)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_sql(10+r,13);
r | i | s
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
2 | 12 | 4
2 | 13 | 5
3 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_sql(10+r,13) WITH ORDINALITY AS f(i,s,o);
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
1 | 12 | 2 | 2
1 | 13 | 3 | 3
2 | 12 | 4 | 1
2 | 13 | 5 | 2
3 | 13 | 6 | 1
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_sql(11,10+r);
r | i | s
---+----+---
1 | 11 | 1
2 | 11 | 2
2 | 12 | 3
3 | 11 | 4
3 | 12 | 5
3 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_sql(11,10+r) WITH ORDINALITY AS f(i,s,o);
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
2 | 11 | 2 | 1
2 | 12 | 3 | 2
3 | 11 | 4 | 1
3 | 12 | 5 | 2
3 | 13 | 6 | 3
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (11,12),(13,15),(16,20)) v(r1,r2), rngfunc_sql(r1,r2);
r1 | r2 | i | s
----+----+----+----
11 | 12 | 11 | 1
11 | 12 | 12 | 2
13 | 15 | 13 | 3
13 | 15 | 14 | 4
13 | 15 | 15 | 5
16 | 20 | 16 | 6
16 | 20 | 17 | 7
16 | 20 | 18 | 8
16 | 20 | 19 | 9
16 | 20 | 20 | 10
(10 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (11,12),(13,15),(16,20)) v(r1,r2), rngfunc_sql(r1,r2) WITH ORDINALITY AS f(i,s,o);
r1 | r2 | i | s | o
----+----+----+----+---
11 | 12 | 11 | 1 | 1
11 | 12 | 12 | 2 | 2
13 | 15 | 13 | 3 | 1
13 | 15 | 14 | 4 | 2
13 | 15 | 15 | 5 | 3
16 | 20 | 16 | 6 | 1
16 | 20 | 17 | 7 | 2
16 | 20 | 18 | 8 | 3
16 | 20 | 19 | 9 | 4
16 | 20 | 20 | 10 | 5
(10 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_mat(10+r,13);
r | i | s
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
2 | 12 | 4
2 | 13 | 5
3 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_mat(10+r,13) WITH ORDINALITY AS f(i,s,o);
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
1 | 12 | 2 | 2
1 | 13 | 3 | 3
2 | 12 | 4 | 1
2 | 13 | 5 | 2
3 | 13 | 6 | 1
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_mat(11,10+r);
r | i | s
---+----+---
1 | 11 | 1
2 | 11 | 2
2 | 12 | 3
3 | 11 | 4
3 | 12 | 5
3 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), rngfunc_mat(11,10+r) WITH ORDINALITY AS f(i,s,o);
r | i | s | o
---+----+---+---
1 | 11 | 1 | 1
2 | 11 | 2 | 1
2 | 12 | 3 | 2
3 | 11 | 4 | 1
3 | 12 | 5 | 2
3 | 13 | 6 | 3
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (11,12),(13,15),(16,20)) v(r1,r2), rngfunc_mat(r1,r2);
r1 | r2 | i | s
----+----+----+----
11 | 12 | 11 | 1
11 | 12 | 12 | 2
13 | 15 | 13 | 3
13 | 15 | 14 | 4
13 | 15 | 15 | 5
16 | 20 | 16 | 6
16 | 20 | 17 | 7
16 | 20 | 18 | 8
16 | 20 | 19 | 9
16 | 20 | 20 | 10
(10 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (11,12),(13,15),(16,20)) v(r1,r2), rngfunc_mat(r1,r2) WITH ORDINALITY AS f(i,s,o);
r1 | r2 | i | s | o
----+----+----+----+---
11 | 12 | 11 | 1 | 1
11 | 12 | 12 | 2 | 2
13 | 15 | 13 | 3 | 1
13 | 15 | 14 | 4 | 2
13 | 15 | 15 | 5 | 3
16 | 20 | 16 | 6 | 1
16 | 20 | 17 | 7 | 2
16 | 20 | 18 | 8 | 3
16 | 20 | 19 | 9 | 4
16 | 20 | 20 | 10 | 5
(10 rows)
-- selective rescan of multiple functions:
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), ROWS FROM( rngfunc_sql(11,11), rngfunc_mat(10+r,13) );
r | i | s | i | s
---+----+---+----+---
1 | 11 | 1 | 11 | 1
1 | | | 12 | 2
1 | | | 13 | 3
2 | 11 | 1 | 12 | 4
2 | | | 13 | 5
3 | 11 | 1 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), ROWS FROM( rngfunc_sql(10+r,13), rngfunc_mat(11,11) );
r | i | s | i | s
---+----+---+----+---
1 | 11 | 1 | 11 | 1
1 | 12 | 2 | |
1 | 13 | 3 | |
2 | 12 | 4 | 11 | 1
2 | 13 | 5 | |
3 | 13 | 6 | 11 | 1
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM (VALUES (1),(2),(3)) v(r), ROWS FROM( rngfunc_sql(10+r,13), rngfunc_mat(10+r,13) );
r | i | s | i | s
---+----+---+----+---
1 | 11 | 1 | 11 | 1
1 | 12 | 2 | 12 | 2
1 | 13 | 3 | 13 | 3
2 | 12 | 4 | 12 | 4
2 | 13 | 5 | 13 | 5
3 | 13 | 6 | 13 | 6
(6 rows)
SELECT setval('rngfunc_rescan_seq1',1,false),setval('rngfunc_rescan_seq2',1,false);
setval | setval
--------+--------
1 | 1
(1 row)
SELECT * FROM generate_series(1,2) r1, generate_series(r1,3) r2, ROWS FROM( rngfunc_sql(10+r1,13), rngfunc_mat(10+r2,13) );
r1 | r2 | i | s | i | s
----+----+----+----+----+---
1 | 1 | 11 | 1 | 11 | 1
1 | 1 | 12 | 2 | 12 | 2
1 | 1 | 13 | 3 | 13 | 3
1 | 2 | 11 | 4 | 12 | 4
1 | 2 | 12 | 5 | 13 | 5
1 | 2 | 13 | 6 | |
1 | 3 | 11 | 7 | 13 | 6
1 | 3 | 12 | 8 | |
1 | 3 | 13 | 9 | |
2 | 2 | 12 | 10 | 12 | 7
2 | 2 | 13 | 11 | 13 | 8
2 | 3 | 12 | 12 | 13 | 9
2 | 3 | 13 | 13 | |
(13 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r), generate_series(10+r,20-r) f(i);
r | i
---+----
1 | 11
1 | 12
1 | 13
1 | 14
1 | 15
1 | 16
1 | 17
1 | 18
1 | 19
2 | 12
2 | 13
2 | 14
2 | 15
2 | 16
2 | 17
2 | 18
3 | 13
3 | 14
3 | 15
3 | 16
3 | 17
(21 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r), generate_series(10+r,20-r) WITH ORDINALITY AS f(i,o);
r | i | o
---+----+---
1 | 11 | 1
1 | 12 | 2
1 | 13 | 3
1 | 14 | 4
1 | 15 | 5
1 | 16 | 6
1 | 17 | 7
1 | 18 | 8
1 | 19 | 9
2 | 12 | 1
2 | 13 | 2
2 | 14 | 3
2 | 15 | 4
2 | 16 | 5
2 | 17 | 6
2 | 18 | 7
3 | 13 | 1
3 | 14 | 2
3 | 15 | 3
3 | 16 | 4
3 | 17 | 5
(21 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r), unnest(array[r*10,r*20,r*30]) f(i);
r | i
---+----
1 | 10
1 | 20
1 | 30
2 | 20
2 | 40
2 | 60
3 | 30
3 | 60
3 | 90
(9 rows)
SELECT * FROM (VALUES (1),(2),(3)) v(r), unnest(array[r*10,r*20,r*30]) WITH ORDINALITY AS f(i,o);
r | i | o
---+----+---
1 | 10 | 1
1 | 20 | 2
1 | 30 | 3
2 | 20 | 1
2 | 40 | 2
2 | 60 | 3
3 | 30 | 1
3 | 60 | 2
3 | 90 | 3
(9 rows)
-- deep nesting
SELECT * FROM (VALUES (1),(2),(3)) v1(r1),
LATERAL (SELECT r1, * FROM (VALUES (10),(20),(30)) v2(r2)
LEFT JOIN generate_series(21,23) f(i) ON ((r2+i)<100) OFFSET 0) s1;
r1 | r1 | r2 | i
----+----+----+----
1 | 1 | 10 | 21
1 | 1 | 10 | 22
1 | 1 | 10 | 23
1 | 1 | 20 | 21
1 | 1 | 20 | 22
1 | 1 | 20 | 23
1 | 1 | 30 | 21
1 | 1 | 30 | 22
1 | 1 | 30 | 23
2 | 2 | 10 | 21
2 | 2 | 10 | 22
2 | 2 | 10 | 23
2 | 2 | 20 | 21
2 | 2 | 20 | 22
2 | 2 | 20 | 23
2 | 2 | 30 | 21
2 | 2 | 30 | 22
2 | 2 | 30 | 23
3 | 3 | 10 | 21
3 | 3 | 10 | 22
3 | 3 | 10 | 23
3 | 3 | 20 | 21
3 | 3 | 20 | 22
3 | 3 | 20 | 23
3 | 3 | 30 | 21
3 | 3 | 30 | 22
3 | 3 | 30 | 23
(27 rows)
SELECT * FROM (VALUES (1),(2),(3)) v1(r1),
LATERAL (SELECT r1, * FROM (VALUES (10),(20),(30)) v2(r2)
LEFT JOIN generate_series(20+r1,23) f(i) ON ((r2+i)<100) OFFSET 0) s1;
r1 | r1 | r2 | i
----+----+----+----
1 | 1 | 10 | 21
1 | 1 | 10 | 22
1 | 1 | 10 | 23
1 | 1 | 20 | 21
1 | 1 | 20 | 22
1 | 1 | 20 | 23
1 | 1 | 30 | 21
1 | 1 | 30 | 22
1 | 1 | 30 | 23
2 | 2 | 10 | 22
2 | 2 | 10 | 23
2 | 2 | 20 | 22
2 | 2 | 20 | 23
2 | 2 | 30 | 22
2 | 2 | 30 | 23
3 | 3 | 10 | 23
3 | 3 | 20 | 23
3 | 3 | 30 | 23
(18 rows)
SELECT * FROM (VALUES (1),(2),(3)) v1(r1),
LATERAL (SELECT r1, * FROM (VALUES (10),(20),(30)) v2(r2)
LEFT JOIN generate_series(r2,r2+3) f(i) ON ((r2+i)<100) OFFSET 0) s1;
r1 | r1 | r2 | i
----+----+----+----
1 | 1 | 10 | 10
1 | 1 | 10 | 11
1 | 1 | 10 | 12
1 | 1 | 10 | 13
1 | 1 | 20 | 20
1 | 1 | 20 | 21
1 | 1 | 20 | 22
1 | 1 | 20 | 23
1 | 1 | 30 | 30
1 | 1 | 30 | 31
1 | 1 | 30 | 32
1 | 1 | 30 | 33
2 | 2 | 10 | 10
2 | 2 | 10 | 11
2 | 2 | 10 | 12
2 | 2 | 10 | 13
2 | 2 | 20 | 20
2 | 2 | 20 | 21
2 | 2 | 20 | 22
2 | 2 | 20 | 23
2 | 2 | 30 | 30
2 | 2 | 30 | 31
2 | 2 | 30 | 32
2 | 2 | 30 | 33
3 | 3 | 10 | 10
3 | 3 | 10 | 11
3 | 3 | 10 | 12
3 | 3 | 10 | 13
3 | 3 | 20 | 20
3 | 3 | 20 | 21
3 | 3 | 20 | 22
3 | 3 | 20 | 23
3 | 3 | 30 | 30
3 | 3 | 30 | 31
3 | 3 | 30 | 32
3 | 3 | 30 | 33
(36 rows)
SELECT * FROM (VALUES (1),(2),(3)) v1(r1),
LATERAL (SELECT r1, * FROM (VALUES (10),(20),(30)) v2(r2)
LEFT JOIN generate_series(r1,2+r2/5) f(i) ON ((r2+i)<100) OFFSET 0) s1;
r1 | r1 | r2 | i
----+----+----+---
1 | 1 | 10 | 1
1 | 1 | 10 | 2
1 | 1 | 10 | 3
1 | 1 | 10 | 4
1 | 1 | 20 | 1
1 | 1 | 20 | 2
1 | 1 | 20 | 3
1 | 1 | 20 | 4
1 | 1 | 20 | 5
1 | 1 | 20 | 6
1 | 1 | 30 | 1
1 | 1 | 30 | 2
1 | 1 | 30 | 3
1 | 1 | 30 | 4
1 | 1 | 30 | 5
1 | 1 | 30 | 6
1 | 1 | 30 | 7
1 | 1 | 30 | 8
2 | 2 | 10 | 2
2 | 2 | 10 | 3
2 | 2 | 10 | 4
2 | 2 | 20 | 2
2 | 2 | 20 | 3
2 | 2 | 20 | 4
2 | 2 | 20 | 5
2 | 2 | 20 | 6
2 | 2 | 30 | 2
2 | 2 | 30 | 3
2 | 2 | 30 | 4
2 | 2 | 30 | 5
2 | 2 | 30 | 6
2 | 2 | 30 | 7
2 | 2 | 30 | 8
3 | 3 | 10 | 3
3 | 3 | 10 | 4
3 | 3 | 20 | 3
3 | 3 | 20 | 4
3 | 3 | 20 | 5
3 | 3 | 20 | 6
3 | 3 | 30 | 3
3 | 3 | 30 | 4
3 | 3 | 30 | 5
3 | 3 | 30 | 6
3 | 3 | 30 | 7
3 | 3 | 30 | 8
(45 rows)
-- check handling of FULL JOIN with multiple lateral references (bug #15741)
SELECT *
FROM (VALUES (1),(2)) v1(r1)
LEFT JOIN LATERAL (
SELECT *
FROM generate_series(1, v1.r1) AS gs1
LEFT JOIN LATERAL (
SELECT *
FROM generate_series(1, gs1) AS gs2
LEFT JOIN generate_series(1, gs2) AS gs3 ON TRUE
) AS ss1 ON TRUE
FULL JOIN generate_series(1, v1.r1) AS gs4 ON FALSE
) AS ss0 ON TRUE;
r1 | gs1 | gs2 | gs3 | gs4
----+-----+-----+-----+-----
1 | | | | 1
1 | 1 | 1 | 1 |
2 | | | | 1
2 | | | | 2
2 | 1 | 1 | 1 |
2 | 2 | 1 | 1 |
2 | 2 | 2 | 1 |
2 | 2 | 2 | 2 |
(8 rows)
DROP FUNCTION rngfunc_sql(int,int);
DROP FUNCTION rngfunc_mat(int,int);
DROP SEQUENCE rngfunc_rescan_seq1;
DROP SEQUENCE rngfunc_rescan_seq2;
--
-- Test cases involving OUT parameters
--
CREATE FUNCTION rngfunc(in f1 int, out f2 int)
AS 'select $1+1' LANGUAGE sql;
SELECT rngfunc(42);
rngfunc
---------
43
(1 row)
SELECT * FROM rngfunc(42);
f2
----
43
(1 row)
SELECT * FROM rngfunc(42) AS p(x);
x
----
43
(1 row)
-- explicit spec of return type is OK
CREATE OR REPLACE FUNCTION rngfunc(in f1 int, out f2 int) RETURNS int
AS 'select $1+1' LANGUAGE sql;
-- error, wrong result type
CREATE OR REPLACE FUNCTION rngfunc(in f1 int, out f2 int) RETURNS float
AS 'select $1+1' LANGUAGE sql;
ERROR: function result type must be integer because of OUT parameters
-- with multiple OUT params you must get a RECORD result
CREATE OR REPLACE FUNCTION rngfunc(in f1 int, out f2 int, out f3 text) RETURNS int
AS 'select $1+1' LANGUAGE sql;
ERROR: function result type must be record because of OUT parameters
CREATE OR REPLACE FUNCTION rngfunc(in f1 int, out f2 int, out f3 text)
RETURNS record
AS 'select $1+1' LANGUAGE sql;
ERROR: cannot change return type of existing function
HINT: Use DROP FUNCTION rngfunc(integer) first.
CREATE OR REPLACE FUNCTION rngfuncr(in f1 int, out f2 int, out text)
AS $$select $1-1, $1::text || 'z'$$ LANGUAGE sql;
SELECT f1, rngfuncr(f1) FROM int4_tbl;
f1 | rngfuncr
-------------+----------------------------
0 | (-1,0z)
123456 | (123455,123456z)
-123456 | (-123457,-123456z)
2147483647 | (2147483646,2147483647z)
-2147483647 | (-2147483648,-2147483647z)
(5 rows)
SELECT * FROM rngfuncr(42);
f2 | column2
----+---------
41 | 42z
(1 row)
SELECT * FROM rngfuncr(42) AS p(a,b);
a | b
----+-----
41 | 42z
(1 row)
CREATE OR REPLACE FUNCTION rngfuncb(in f1 int, inout f2 int, out text)
AS $$select $2-1, $1::text || 'z'$$ LANGUAGE sql;
SELECT f1, rngfuncb(f1, f1/2) FROM int4_tbl;
f1 | rngfuncb
-------------+----------------------------
0 | (-1,0z)
123456 | (61727,123456z)
-123456 | (-61729,-123456z)
2147483647 | (1073741822,2147483647z)
-2147483647 | (-1073741824,-2147483647z)
(5 rows)
SELECT * FROM rngfuncb(42, 99);
f2 | column2
----+---------
98 | 42z
(1 row)
SELECT * FROM rngfuncb(42, 99) AS p(a,b);
a | b
----+-----
98 | 42z
(1 row)
-- Can reference function with or without OUT params for DROP, etc
DROP FUNCTION rngfunc(int);
DROP FUNCTION rngfuncr(in f2 int, out f1 int, out text);
DROP FUNCTION rngfuncb(in f1 int, inout f2 int);
--
-- For my next trick, polymorphic OUT parameters
--
CREATE FUNCTION dup (f1 anyelement, f2 out anyelement, f3 out anyarray)
AS 'select $1, array[$1,$1]' LANGUAGE sql;
SELECT dup(22);
dup
----------------
(22,"{22,22}")
(1 row)
SELECT dup('xyz'); -- fails
ERROR: could not determine polymorphic type because input has type unknown
SELECT dup('xyz'::text);
dup
-------------------
(xyz,"{xyz,xyz}")
(1 row)
SELECT * FROM dup('xyz'::text);
f2 | f3
-----+-----------
xyz | {xyz,xyz}
(1 row)
-- fails, as we are attempting to rename first argument
CREATE OR REPLACE FUNCTION dup (inout f2 anyelement, out f3 anyarray)
AS 'select $1, array[$1,$1]' LANGUAGE sql;
ERROR: cannot change name of input parameter "f1"
HINT: Use DROP FUNCTION dup(anyelement) first.
DROP FUNCTION dup(anyelement);
-- equivalent behavior, though different name exposed for input arg
CREATE OR REPLACE FUNCTION dup (inout f2 anyelement, out f3 anyarray)
AS 'select $1, array[$1,$1]' LANGUAGE sql;
SELECT dup(22);
dup
----------------
(22,"{22,22}")
(1 row)
DROP FUNCTION dup(anyelement);
-- fails, no way to deduce outputs
CREATE FUNCTION bad (f1 int, out f2 anyelement, out f3 anyarray)
AS 'select $1, array[$1,$1]' LANGUAGE sql;
ERROR: cannot determine result data type
DETAIL: A function returning a polymorphic type must have at least one polymorphic argument.
--
-- table functions
--
CREATE OR REPLACE FUNCTION rngfunc()
RETURNS TABLE(a int)
AS $$ SELECT a FROM generate_series(1,5) a(a) $$ LANGUAGE sql;
SELECT * FROM rngfunc();
a
---
1
2
3
4
5
(5 rows)
DROP FUNCTION rngfunc();
CREATE OR REPLACE FUNCTION rngfunc(int)
RETURNS TABLE(a int, b int)
AS $$ SELECT a, b
FROM generate_series(1,$1) a(a),
generate_series(1,$1) b(b) $$ LANGUAGE sql;
SELECT * FROM rngfunc(3);
a | b
---+---
1 | 1
1 | 2
1 | 3
2 | 1
2 | 2
2 | 3
3 | 1
3 | 2
3 | 3
(9 rows)
DROP FUNCTION rngfunc(int);
-- case that causes change of typmod knowledge during inlining
CREATE OR REPLACE FUNCTION rngfunc()
RETURNS TABLE(a varchar(5))
AS $$ SELECT 'hello'::varchar(5) $$ LANGUAGE sql STABLE;
SELECT * FROM rngfunc() GROUP BY 1;
a
-------
hello
(1 row)
DROP FUNCTION rngfunc();
--
-- some tests on SQL functions with RETURNING
--
create temp table tt(f1 serial, data text);
create function insert_tt(text) returns int as
$$ insert into tt(data) values($1) returning f1 $$
language sql;
select insert_tt('foo');
insert_tt
-----------
1
(1 row)
select insert_tt('bar');
insert_tt
-----------
2
(1 row)
select * from tt;
f1 | data
----+------
1 | foo
2 | bar
(2 rows)
-- insert will execute to completion even if function needs just 1 row
create or replace function insert_tt(text) returns int as
$$ insert into tt(data) values($1),($1||$1) returning f1 $$
language sql;
select insert_tt('fool');
insert_tt
-----------
3
(1 row)
select * from tt;
f1 | data
----+----------
1 | foo
2 | bar
3 | fool
4 | foolfool
(4 rows)
-- setof does what's expected
create or replace function insert_tt2(text,text) returns setof int as
$$ insert into tt(data) values($1),($2) returning f1 $$
language sql;
select insert_tt2('foolish','barrish');
insert_tt2
------------
5
6
(2 rows)
select * from insert_tt2('baz','quux');
insert_tt2
------------
7
8
(2 rows)
select * from tt;
f1 | data
----+----------
1 | foo
2 | bar
3 | fool
4 | foolfool
5 | foolish
6 | barrish
7 | baz
8 | quux
(8 rows)
-- limit doesn't prevent execution to completion
select insert_tt2('foolish','barrish') limit 1;
insert_tt2
------------
9
(1 row)
select * from tt;
f1 | data
----+----------
1 | foo
2 | bar
3 | fool
4 | foolfool
5 | foolish
6 | barrish
7 | baz
8 | quux
9 | foolish
10 | barrish
(10 rows)
-- triggers will fire, too
create function noticetrigger() returns trigger as $$
begin
raise notice 'noticetrigger % %', new.f1, new.data;
return null;
end $$ language plpgsql;
create trigger tnoticetrigger after insert on tt for each row
execute procedure noticetrigger();
select insert_tt2('foolme','barme') limit 1;
NOTICE: noticetrigger 11 foolme
NOTICE: noticetrigger 12 barme
insert_tt2
------------
11
(1 row)
select * from tt;
f1 | data
----+----------
1 | foo
2 | bar
3 | fool
4 | foolfool
5 | foolish
6 | barrish
7 | baz
8 | quux
9 | foolish
10 | barrish
11 | foolme
12 | barme
(12 rows)
-- and rules work
create temp table tt_log(f1 int, data text);
create rule insert_tt_rule as on insert to tt do also
insert into tt_log values(new.*);
select insert_tt2('foollog','barlog') limit 1;
NOTICE: noticetrigger 13 foollog
NOTICE: noticetrigger 14 barlog
insert_tt2
------------
13
(1 row)
select * from tt;
f1 | data
----+----------
1 | foo
2 | bar
3 | fool
4 | foolfool
5 | foolish
6 | barrish
7 | baz
8 | quux
9 | foolish
10 | barrish
11 | foolme
12 | barme
13 | foollog
14 | barlog
(14 rows)
-- note that nextval() gets executed a second time in the rule expansion,
-- which is expected.
select * from tt_log;
f1 | data
----+---------
15 | foollog
16 | barlog
(2 rows)
-- test case for a whole-row-variable bug
create function rngfunc1(n integer, out a text, out b text)
returns setof record
language sql
as $$ select 'foo ' || i, 'bar ' || i from generate_series(1,$1) i $$;
set work_mem='64kB';
select t.a, t, t.a from rngfunc1(10000) t limit 1;
a | t | a
-------+-------------------+-------
foo 1 | ("foo 1","bar 1") | foo 1
(1 row)
reset work_mem;
select t.a, t, t.a from rngfunc1(10000) t limit 1;
a | t | a
-------+-------------------+-------
foo 1 | ("foo 1","bar 1") | foo 1
(1 row)
drop function rngfunc1(n integer);
-- test use of SQL functions returning record
-- this is supported in some cases where the query doesn't specify
-- the actual record type ...
create function array_to_set(anyarray) returns setof record as $$
select i AS "index", $1[i] AS "value" from generate_subscripts($1, 1) i
$$ language sql strict immutable;
select array_to_set(array['one', 'two']);
array_to_set
--------------
(1,one)
(2,two)
(2 rows)
select * from array_to_set(array['one', 'two']) as t(f1 int,f2 text);
f1 | f2
----+-----
1 | one
2 | two
(2 rows)
select * from array_to_set(array['one', 'two']); -- fail
ERROR: a column definition list is required for functions returning "record"
LINE 1: select * from array_to_set(array['one', 'two']);
^
-- after-the-fact coercion of the columns is now possible, too
select * from array_to_set(array['one', 'two']) as t(f1 numeric(4,2),f2 text);
f1 | f2
------+-----
1.00 | one
2.00 | two
(2 rows)
-- and if it doesn't work, you get a compile-time not run-time error
select * from array_to_set(array['one', 'two']) as t(f1 point,f2 text);
ERROR: return type mismatch in function declared to return record
DETAIL: Final statement returns integer instead of point at column 1.
CONTEXT: SQL function "array_to_set" during startup
-- with "strict", this function can't be inlined in FROM
explain (verbose, costs off)
select * from array_to_set(array['one', 'two']) as t(f1 numeric(4,2),f2 text);
QUERY PLAN
----------------------------------------------------
Function Scan on public.array_to_set t
Output: f1, f2
Function Call: array_to_set('{one,two}'::text[])
(3 rows)
-- but without, it can be:
create or replace function array_to_set(anyarray) returns setof record as $$
select i AS "index", $1[i] AS "value" from generate_subscripts($1, 1) i
$$ language sql immutable;
select array_to_set(array['one', 'two']);
array_to_set
--------------
(1,one)
(2,two)
(2 rows)
select * from array_to_set(array['one', 'two']) as t(f1 int,f2 text);
f1 | f2
----+-----
1 | one
2 | two
(2 rows)
select * from array_to_set(array['one', 'two']) as t(f1 numeric(4,2),f2 text);
f1 | f2
------+-----
1.00 | one
2.00 | two
(2 rows)
select * from array_to_set(array['one', 'two']) as t(f1 point,f2 text);
ERROR: return type mismatch in function declared to return record
DETAIL: Final statement returns integer instead of point at column 1.
CONTEXT: SQL function "array_to_set" during inlining
explain (verbose, costs off)
select * from array_to_set(array['one', 'two']) as t(f1 numeric(4,2),f2 text);
QUERY PLAN
--------------------------------------------------------------
Function Scan on pg_catalog.generate_subscripts i
Output: i.i, ('{one,two}'::text[])[i.i]
Function Call: generate_subscripts('{one,two}'::text[], 1)
(3 rows)
create temp table rngfunc(f1 int8, f2 int8);
create function testrngfunc() returns record as $$
insert into rngfunc values (1,2) returning *;
$$ language sql;
select testrngfunc();
testrngfunc
-------------
(1,2)
(1 row)
select * from testrngfunc() as t(f1 int8,f2 int8);
f1 | f2
----+----
1 | 2
(1 row)
select * from testrngfunc(); -- fail
ERROR: a column definition list is required for functions returning "record"
LINE 1: select * from testrngfunc();
^
drop function testrngfunc();
create function testrngfunc() returns setof record as $$
insert into rngfunc values (1,2), (3,4) returning *;
$$ language sql;
select testrngfunc();
testrngfunc
-------------
(1,2)
(3,4)
(2 rows)
select * from testrngfunc() as t(f1 int8,f2 int8);
f1 | f2
----+----
1 | 2
3 | 4
(2 rows)
select * from testrngfunc(); -- fail
ERROR: a column definition list is required for functions returning "record"
LINE 1: select * from testrngfunc();
^
drop function testrngfunc();
-- Check that typmod imposed by a composite type is honored
create type rngfunc_type as (f1 numeric(35,6), f2 numeric(35,2));
create function testrngfunc() returns rngfunc_type as $$
select 7.136178319899999964, 7.136178319899999964;
$$ language sql immutable;
explain (verbose, costs off)
select testrngfunc();
QUERY PLAN
-------------------------------------------
Result
Output: '(7.136178,7.14)'::rngfunc_type
(2 rows)
select testrngfunc();
testrngfunc
-----------------
(7.136178,7.14)
(1 row)
explain (verbose, costs off)
select * from testrngfunc();
QUERY PLAN
--------------------------------------------------
Function Scan on testrngfunc
Output: f1, f2
Function Call: '(7.136178,7.14)'::rngfunc_type
(3 rows)
select * from testrngfunc();
f1 | f2
----------+------
7.136178 | 7.14
(1 row)
create or replace function testrngfunc() returns rngfunc_type as $$
select 7.136178319899999964, 7.136178319899999964;
$$ language sql volatile;
explain (verbose, costs off)
select testrngfunc();
QUERY PLAN
-------------------------
Result
Output: testrngfunc()
(2 rows)
select testrngfunc();
testrngfunc
-----------------
(7.136178,7.14)
(1 row)
explain (verbose, costs off)
select * from testrngfunc();
QUERY PLAN
-------------------------------------
Function Scan on public.testrngfunc
Output: f1, f2
Function Call: testrngfunc()
(3 rows)
select * from testrngfunc();
f1 | f2
----------+------
7.136178 | 7.14
(1 row)
drop function testrngfunc();
create function testrngfunc() returns setof rngfunc_type as $$
select 7.136178319899999964, 7.136178319899999964;
$$ language sql immutable;
explain (verbose, costs off)
select testrngfunc();
QUERY PLAN
-------------------------
ProjectSet
Output: testrngfunc()
-> Result
(3 rows)
select testrngfunc();
testrngfunc
-----------------
(7.136178,7.14)
(1 row)
explain (verbose, costs off)
select * from testrngfunc();
QUERY PLAN
--------------------------------------------------------
Result
Output: 7.136178::numeric(35,6), 7.14::numeric(35,2)
(2 rows)
select * from testrngfunc();
f1 | f2
----------+------
7.136178 | 7.14
(1 row)
create or replace function testrngfunc() returns setof rngfunc_type as $$
select 7.136178319899999964, 7.136178319899999964;
$$ language sql volatile;
explain (verbose, costs off)
select testrngfunc();
QUERY PLAN
-------------------------
ProjectSet
Output: testrngfunc()
-> Result
(3 rows)
select testrngfunc();
testrngfunc
-----------------
(7.136178,7.14)
(1 row)
explain (verbose, costs off)
select * from testrngfunc();
QUERY PLAN
-------------------------------------
Function Scan on public.testrngfunc
Output: f1, f2
Function Call: testrngfunc()
(3 rows)
select * from testrngfunc();
f1 | f2
----------+------
7.136178 | 7.14
(1 row)
drop type rngfunc_type cascade;
NOTICE: drop cascades to function testrngfunc()
--
-- Check some cases involving added/dropped columns in a rowtype result
--
create temp table users (userid text, seq int, email text, todrop bool, moredrop int, enabled bool);
insert into users values ('id',1,'email',true,11,true);
insert into users values ('id2',2,'email2',true,12,true);
alter table users drop column todrop;
create or replace function get_first_user() returns users as
$$ SELECT * FROM users ORDER BY userid LIMIT 1; $$
language sql stable;
SELECT get_first_user();
get_first_user
-------------------
(id,1,email,11,t)
(1 row)
SELECT * FROM get_first_user();
userid | seq | email | moredrop | enabled
--------+-----+-------+----------+---------
id | 1 | email | 11 | t
(1 row)
create or replace function get_users() returns setof users as
$$ SELECT * FROM users ORDER BY userid; $$
language sql stable;
SELECT get_users();
get_users
---------------------
(id,1,email,11,t)
(id2,2,email2,12,t)
(2 rows)
SELECT * FROM get_users();
userid | seq | email | moredrop | enabled
--------+-----+--------+----------+---------
id | 1 | email | 11 | t
id2 | 2 | email2 | 12 | t
(2 rows)
SELECT * FROM get_users() WITH ORDINALITY; -- make sure ordinality copes
userid | seq | email | moredrop | enabled | ordinality
--------+-----+--------+----------+---------+------------
id | 1 | email | 11 | t | 1
id2 | 2 | email2 | 12 | t | 2
(2 rows)
-- multiple functions vs. dropped columns
SELECT * FROM ROWS FROM(generate_series(10,11), get_users()) WITH ORDINALITY;
generate_series | userid | seq | email | moredrop | enabled | ordinality
-----------------+--------+-----+--------+----------+---------+------------
10 | id | 1 | email | 11 | t | 1
11 | id2 | 2 | email2 | 12 | t | 2
(2 rows)
SELECT * FROM ROWS FROM(get_users(), generate_series(10,11)) WITH ORDINALITY;
userid | seq | email | moredrop | enabled | generate_series | ordinality
--------+-----+--------+----------+---------+-----------------+------------
id | 1 | email | 11 | t | 10 | 1
id2 | 2 | email2 | 12 | t | 11 | 2
(2 rows)
-- check that we can cope with post-parsing changes in rowtypes
create temp view usersview as
SELECT * FROM ROWS FROM(get_users(), generate_series(10,11)) WITH ORDINALITY;
select * from usersview;
userid | seq | email | moredrop | enabled | generate_series | ordinality
--------+-----+--------+----------+---------+-----------------+------------
id | 1 | email | 11 | t | 10 | 1
id2 | 2 | email2 | 12 | t | 11 | 2
(2 rows)
alter table users add column junk text;
select * from usersview;
userid | seq | email | moredrop | enabled | generate_series | ordinality
--------+-----+--------+----------+---------+-----------------+------------
id | 1 | email | 11 | t | 10 | 1
id2 | 2 | email2 | 12 | t | 11 | 2
(2 rows)
begin;
alter table users drop column moredrop;
select * from usersview; -- expect clean failure
ERROR: attribute 5 of type record has been dropped
rollback;
alter table users alter column seq type numeric;
select * from usersview; -- expect clean failure
ERROR: attribute 2 of type record has wrong type
DETAIL: Table has type numeric, but query expects integer.
drop view usersview;
drop function get_first_user();
drop function get_users();
drop table users;
-- check behavior with type coercion required for a set-op
create or replace function rngfuncbar() returns setof text as
$$ select 'foo'::varchar union all select 'bar'::varchar ; $$
language sql stable;
select rngfuncbar();
rngfuncbar
------------
foo
bar
(2 rows)
select * from rngfuncbar();
rngfuncbar
------------
foo
bar
(2 rows)
-- this function is now inlinable, too:
explain (verbose, costs off) select * from rngfuncbar();
QUERY PLAN
------------------------------------------------
Result
Output: ('foo'::character varying)
-> Append
-> Result
Output: 'foo'::character varying
-> Result
Output: 'bar'::character varying
(7 rows)
drop function rngfuncbar();
-- check handling of a SQL function with multiple OUT params (bug #5777)
create or replace function rngfuncbar(out integer, out numeric) as
$$ select (1, 2.1) $$ language sql;
select * from rngfuncbar();
column1 | column2
---------+---------
1 | 2.1
(1 row)
create or replace function rngfuncbar(out integer, out numeric) as
$$ select (1, 2) $$ language sql;
select * from rngfuncbar(); -- fail
ERROR: function return row and query-specified return row do not match
DETAIL: Returned type integer at ordinal position 2, but query expects numeric.
create or replace function rngfuncbar(out integer, out numeric) as
$$ select (1, 2.1, 3) $$ language sql;
select * from rngfuncbar(); -- fail
ERROR: function return row and query-specified return row do not match
DETAIL: Returned row contains 3 attributes, but query expects 2.
drop function rngfuncbar();
-- check whole-row-Var handling in nested lateral functions (bug #11703)
create function extractq2(t int8_tbl) returns int8 as $$
select t.q2
$$ language sql immutable;
explain (verbose, costs off)
select x from int8_tbl, extractq2(int8_tbl) f(x);
QUERY PLAN
------------------------------------------
Nested Loop
Output: f.x
-> Seq Scan on public.int8_tbl
Output: int8_tbl.q1, int8_tbl.q2
-> Function Scan on f
Output: f.x
Function Call: int8_tbl.q2
(7 rows)
select x from int8_tbl, extractq2(int8_tbl) f(x);
x
-------------------
456
4567890123456789
123
4567890123456789
-4567890123456789
(5 rows)
create function extractq2_2(t int8_tbl) returns table(ret1 int8) as $$
select extractq2(t) offset 0
$$ language sql immutable;
explain (verbose, costs off)
select x from int8_tbl, extractq2_2(int8_tbl) f(x);
QUERY PLAN
-----------------------------------
Nested Loop
Output: ((int8_tbl.*).q2)
-> Seq Scan on public.int8_tbl
Output: int8_tbl.*
-> Result
Output: (int8_tbl.*).q2
(6 rows)
select x from int8_tbl, extractq2_2(int8_tbl) f(x);
x
-------------------
456
4567890123456789
123
4567890123456789
-4567890123456789
(5 rows)
-- without the "offset 0", this function gets optimized quite differently
create function extractq2_2_opt(t int8_tbl) returns table(ret1 int8) as $$
select extractq2(t)
$$ language sql immutable;
explain (verbose, costs off)
select x from int8_tbl, extractq2_2_opt(int8_tbl) f(x);
QUERY PLAN
-----------------------------
Seq Scan on public.int8_tbl
Output: int8_tbl.q2
(2 rows)
select x from int8_tbl, extractq2_2_opt(int8_tbl) f(x);
x
-------------------
456
4567890123456789
123
4567890123456789
-4567890123456789
(5 rows)
-- check handling of nulls in SRF results (bug #7808)
create type rngfunc2 as (a integer, b text);
select *, row_to_json(u) from unnest(array[(1,'foo')::rngfunc2, null::rngfunc2]) u;
a | b | row_to_json
---+-----+---------------------
1 | foo | {"a":1,"b":"foo"}
| | {"a":null,"b":null}
(2 rows)
select *, row_to_json(u) from unnest(array[null::rngfunc2, null::rngfunc2]) u;
a | b | row_to_json
---+---+---------------------
| | {"a":null,"b":null}
| | {"a":null,"b":null}
(2 rows)
select *, row_to_json(u) from unnest(array[null::rngfunc2, (1,'foo')::rngfunc2, null::rngfunc2]) u;
a | b | row_to_json
---+-----+---------------------
| | {"a":null,"b":null}
1 | foo | {"a":1,"b":"foo"}
| | {"a":null,"b":null}
(3 rows)
select *, row_to_json(u) from unnest(array[]::rngfunc2[]) u;
a | b | row_to_json
---+---+-------------
(0 rows)
drop type rngfunc2;
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