Woops, figured it out. Just needed to declare the num_var := ''; On Sep 11, 10:45 pm, Nick <nboutel...@gmail.com> wrote: > CREATE FUNCTION test() RETURNS text > LANGUAGE plpgsql > AS $$DECLARE > num_var TEXT; > BEGIN > FOR i IN 1..10 LOOP > num_var := num_var || ',' || i; > END LOOP; > RETURN num_var; > END;$$; > > SELECT test(); > > returns NULL
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