zsxwing commented on code in PR #40776:
URL: https://github.com/apache/spark/pull/40776#discussion_r1168134689
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/package.scala:
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@@ -225,4 +226,25 @@ package object util extends Logging {
}
}
}
+
+ val AUTO_GENERATED_ALIAS = "__autoGeneratedAlias"
+
+ val INTERNAL_METADATA_KEYS = Seq(
+ AUTO_GENERATED_ALIAS,
Review Comment:
Are these metadata keys only in the top level columns?
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