Spark数据集 - 避免重复Scala案例类字段

Question

通常我需要输入两个非常接近的列的Spark数据集，如下所示：

case class Car (
  serial_number: Int,
  year: Int,
  brand: String,
  colour: String,
  horsepower: Int,
  weight: Int,
  width: Float,
  length: Float,
  seats: Int,
  owner: String,
  mileage: Int
)

case class CarWithOptionalMileage (
  serial_number: Int,
  year: Int,
  brand: String,
  colour: String,
  horsepower: Int,
  weight: Int,
  width: Float,
  length: Float,
  seats: Int,
  owner: String,
  mileage: Option[Int]        // <--- this is the only different field
)

我知道case class无法扩展另一个case class，但是有没有办法避免所有这些字段重复，只需指定CarWithOptionalMileage中的不同字段？< / p>