Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/22957#discussion_r237532156 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -2542,10 +2542,10 @@ object EliminateUnions extends Rule[LogicalPlan] { * rule can't work for those parameters. */ object CleanupAliases extends Rule[LogicalPlan] { - private def trimAliases(e: Expression): Expression = { + private[catalyst] def trimAliases(e: Expression): Expression = { e.transformDown { - case Alias(child, _) => child - case MultiAlias(child, _) => child + case Alias(child, _) => trimAliases(child) --- End diff -- it's `transformDown`, why doesn't it work?
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org