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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