cloud-fan commented on a change in pull request #27937: [SPARK-30127][SQL]
Support case class parameter for typed Scala UDF
URL: https://github.com/apache/spark/pull/27937#discussion_r395490695
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File path: sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
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@@ -200,8 +200,8 @@ class UDFRegistration private[sql] (functionRegistry:
FunctionRegistry) extends
*/
def register[RT: TypeTag, A1: TypeTag](name: String, func: Function1[A1,
RT]): UserDefinedFunction = {
val ScalaReflection.Schema(dataType, nullable) =
ScalaReflection.schemaFor[RT]
- val inputSchemas: Seq[Option[ScalaReflection.Schema]] =
Try(ScalaReflection.schemaFor[A1]).toOption :: Nil
- val udf = SparkUserDefinedFunction(func, dataType,
inputSchemas).withName(name)
+ val inputEncoders: Seq[Option[ExpressionEncoder[_]]] =
Try(ExpressionEncoder[A1]()).toOption :: Nil
Review comment:
maybe we can remove `applyOption`
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