cloud-fan commented on a change in pull request #29790:
URL: https://github.com/apache/spark/pull/29790#discussion_r492553171
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
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@@ -368,7 +368,7 @@ case class MapEntries(child: Expression)
@transient private lazy val childDataType: MapType =
child.dataType.asInstanceOf[MapType]
- override def dataType: DataType = {
+ private lazy val internalDataType: DataType = {
Review comment:
is it expensive? it just creates a few objects.
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