Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/22063#discussion_r212504250 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/expressions/UserDefinedFunction.scala --- @@ -40,7 +40,14 @@ import org.apache.spark.sql.types.DataType case class UserDefinedFunction protected[sql] ( f: AnyRef, dataType: DataType, - inputTypes: Option[Seq[DataType]]) { + inputTypes: Option[Seq[DataType]], + nullableTypes: Option[Seq[Boolean]] = None) { --- End diff -- +1 to all your comments. I'm overhauling this whole PR and will force push with a rebase once it seems to basically work.
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