CREATE OR REPLACE FUNCTION check_values_different(int1 INT, int2 INT) RETURNS BOOLEAN AS $$
BEGIN
    IF int1 <> int2 THEN
        RETURN TRUE;
    ELSE
        RETURN FALSE;
    END IF;
END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION check_strings_different(str1 VARCHAR, str2 VARCHAR) RETURNS BOOLEAN AS $$
BEGIN
    IF str1 <> str2 THEN
        RETURN TRUE;
    ELSE
        RETURN FALSE;
    END IF;
END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION check_values_different(a INT, b INT) RETURNS BOOLEAN AS $$
BEGIN
    IF a <> b THEN
        RETURN TRUE;
    ELSE
        RETURN FALSE;
    END IF;
END;
$$ LANGUAGE plpgsql;