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create OR REPLACE function xtest(inout rc refcursor) language plpgsql as $$ begin open rc for select unnest('{1,2,3}'::int2[]) id; end;$$;
CREATE FUNCTION
begin; select * from xtest('a'); fetch all from a; close a; commit;
BEGIN
rc
a
SELECT 1
id
1
2
3
FETCH 3
CLOSE CURSOR
COMMIT