Github user mn-mikke commented on a diff in the pull request:
https://github.com/apache/spark/pull/21352#discussion_r188982249
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -388,7 +388,8 @@ case class Reverse(child: Expression) extends
UnaryExpression with ImplicitCastI
override def dataType: DataType = child.dataType
- lazy val elementType: DataType =
dataType.asInstanceOf[ArrayType].elementType
+ @transient
+ private lazy val elementType: DataType =
dataType.asInstanceOf[ArrayType].elementType
--- End diff --
@mgaido91 Thanks for clarification! I thought that code gets generated and
compiled on the driver and sent to each executor.
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