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-- dynamic query support testing
create or replace function dynamic_query(q text)
returns setof record as $x$
cluster 'map0';
run on all;
$x$ language plproxy;
\c test_part0
create or replace function dynamic_query(q text)
returns setof record as $x$
declare
ret record;
begin
for ret in execute q loop
return next ret;
end loop;
return;
end;
$x$ language plpgsql;
create table dynamic_query_test (
id integer,
username text,
other text
);
insert into dynamic_query_test values ( 1, 'user1', 'blah');
insert into dynamic_query_test values ( 2, 'user2', 'foo');
\c regression
select * from dynamic_query('select * from dynamic_query_test') as (id integer, username text, other text);
id | username | other
----+----------+-------
1 | user1 | blah
2 | user2 | foo
(2 rows)
select * from dynamic_query('select id, username from dynamic_query_test') as foo(id integer, username text);
id | username
----+----------
1 | user1
2 | user2
(2 rows)
-- invalid usage
select * from dynamic_query('select count(1) from pg_class');
ERROR: a column definition list is required for functions returning "record"
LINE 1: select * from dynamic_query('select count(1) from pg_class')...
^
select dynamic_query('select count(1) from pg_class');
ERROR: Function used in wrong context
-- test errors
create or replace function dynamic_query_select()
returns setof record as $x$
cluster 'map0';
run on all;
select id, username from dynamic_query_test;
$x$ language plproxy;
ERROR: PL/Proxy function public.dynamic_query_select(0): SELECT statement not allowed for dynamic RECORD functions
select * from dynamic_query_select() as (id integer, username text);
ERROR: function dynamic_query_select() does not exist
LINE 1: select * from dynamic_query_select() as (id integer, usernam...
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
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