cloud-fan commented on a change in pull request #29790:
URL: https://github.com/apache/spark/pull/29790#discussion_r496663486
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
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@@ -1048,6 +1048,11 @@ trait ComplexTypeMergingExpression extends Expression {
@transient
lazy val inputTypesForMerging: Seq[DataType] = children.map(_.dataType)
+ private lazy val internalDataType: DataType = {
Review comment:
can we put it right before the line of `override def dataType: DataType`?
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