presto-main/src/main/java/io/prestosql/type/TimeOperators.java/TimeOperators/subtract
class TimeOperators:    @ScalarOperator(SUBTRACT)
    @SqlType(StandardTypes.INTERVAL_DAY_TO_SECOND)
    public static long subtract(@SqlType(StandardTypes.TIME) long left, @SqlType(StandardTypes.TIME) long right)
    {
        return left - right;
    }