How to create function that returns nothing
Use RETURNS void like below:
CREATE FUNCTION stamp_user(id int, comment text) RETURNS void AS $$ #variable_conflict use_variable DECLARE curtime timestamp := now(); BEGIN UPDATE users SET last_modified = curtime, comment = comment WHERE users.id = id; END;$$ LANGUAGE plpgsql;
Functions must always return something, although you can use procedures like
do $$and start with normal function like
declare...but if you still want to do a function just add void after returns.