Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/20827#discussion_r175621271 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala --- @@ -324,31 +324,28 @@ case class AttributeReference( * A place holder used when printing expressions without debugging information such as the * expression id or the unresolved indicator. */ -case class PrettyAttribute( +case class PrettyNamedExpression( name: String, dataType: DataType = NullType) - extends Attribute with Unevaluable { --- End diff -- You mean the latest commit? I just renamed this because `Alias` is not `Attribute`.
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