[GitHub] [spark] cloud-fan commented on a change in pull request #27937: [SPARK-30127][SQL] Support case class parameter for typed Scala UDF

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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_r395490333
 
 

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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:
   Why do we need `Try` as we have `ExpressionEncoder.applyOption`?

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