Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/20827#discussion_r175088264
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
---
@@ -324,14 +324,14 @@ 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(
--- End diff --
Based on your suggestion, I modified a bit.
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