Github user mgaido91 commented on a diff in the pull request: https://github.com/apache/spark/pull/21352#discussion_r188952027 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala --- @@ -552,7 +553,8 @@ case class Slice(x: Expression, start: Expression, length: Expression) override def children: Seq[Expression] = Seq(x, start, length) - lazy val elementType: DataType = x.dataType.asInstanceOf[ArrayType].elementType + @transient + private lazy val elementType: DataType = x.dataType.asInstanceOf[ArrayType].elementType --- End diff -- ditto
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