Github user marmbrus commented on a diff in the pull request: https://github.com/apache/spark/pull/10963#discussion_r51194963 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -872,7 +872,8 @@ class Analyzer( if (missingExpr.nonEmpty) { extractedExprBuffer += ne } - ne.toAttribute + // alias will be cleaned in the rule CleanupAliases + if (ne.isInstanceOf[Alias]) ne else ne.toAttribute --- End diff -- Well, wait a second. I would like to fix this in branch-1.6 so a minimal fix would be preferred (and we can refactor master later if there is a good reason).
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