Github user mn-mikke commented on a diff in the pull request:
https://github.com/apache/spark/pull/21352#discussion_r188961645
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -1324,15 +1329,17 @@ case class Concat(children: Seq[Expression])
extends Expression {
since = "2.4.0")
case class Flatten(child: Expression) extends UnaryExpression {
- private val MAX_ARRAY_LENGTH = ByteArrayMethods.MAX_ROUNDED_ARRAY_LENGTH
+ private def maxArrayLength: Int =
ByteArrayMethods.MAX_ROUNDED_ARRAY_LENGTH
+ @transient
private lazy val childDataType: ArrayType =
child.dataType.asInstanceOf[ArrayType]
override def nullable: Boolean = child.nullable ||
childDataType.containsNull
override def dataType: DataType = childDataType.elementType
- lazy val elementType: DataType =
dataType.asInstanceOf[ArrayType].elementType
+ @transient
--- End diff --
doGenCode
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