Schema for type Unit is not supported-CFANZ编程社区

Schema for type Unit is not supported

耶也夜

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2022-02-20

 //自定义函数实现需求
  def userLpdf(id:String,length:Int,name:String):Unit={
    val len=length-id.length
    "0" * len+id

  }

自定义udf函数的时候，爆出错误Schema for type Unit is not supported

实际上原因是自定义的函数没有返回值，所以导致出错，把Unit改为String或者直接省去就可以解决问题

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