Github user mn-mikke commented on a diff in the pull request:
https://github.com/apache/spark/pull/21352#discussion_r188958648
--- 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 --
What about `genCodeForResult`?
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