CREATE OR REPLACE FUNCTION policy.is_locked_out_till(user_id integer_strict)
RETURNS timestamp without time zone
LANGUAGE plpgsql
AS $function$
BEGIN
RETURN
(
SELECT MAX(policy.lock_outs.lock_out_till)::TIMESTAMP WITHOUT TIME ZONE FROM policy.lock_outs
WHERE policy.lock_outs.user_id=$1
);
END
$function$