如何在PostgreSQL中使用date和time设置两列之间的间隔？

CREATE TABLE my_table (
    start_date date,
    start_time time,
    end_date date,
    end_time time
);

INSERT INTO my_table (start_date, start_time, end_date, end_time)
VALUES ('2022-01-01', '09:00:00', '2022-01-01', '10:30:00');

SELECT 
    start_date,
    start_time,
    end_date,
    end_time,
    end_date + end_time - start_date - start_time AS interval
FROM my_table;