Prosba o pomoc

CREATE OR REPLACE FUNCTION public.tv_primetime(integer)
 RETURNS integer
 LANGUAGE plpgsql
 IMMUTABLE
AS $function$
    DECLARE
        ttime ALIAS FOR $1;
    BEGIN
        IF ttime < 1100 THEN
            RETURN 1;
        ELSIF ttime < 1730 THEN
            RETURN 1;
        ELSIF ttime < 2230 THEN
            RETURN 2;
        ELSE
            RETURN 3;
        END IF;
    END;
$function$

CREATE OR REPLACE FUNCTION tv_primetime2(integer) RETURNS integer as $$
        DECLARE ttime ALIAS FOR $1;
        BEGIN
        CASE WHEN ttime BETWEEN 600 AND 859 THEN 
        return 0; 
        WHEN ttime BETWEEN 900 AND 1559 THEN 
        return 1; 
        WHEN ttime BETWEEN 1600 AND 1729 THEN 
        return 2; 
        WHEN ttime BETWEEN 1730 AND 2229 THEN 
        return 3; 
        WHEN ttime BETWEEN 2230 AND 2600 THEN 
        return 4; 
        CASE END;
        END;
$$ IMMUTABLE LANGUAGE plpgsql;