cloud-fan commented on code in PR #40258:
URL: https://github.com/apache/spark/pull/40258#discussion_r1147252040
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala:
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@@ -258,7 +258,7 @@ package object expressions {
case (Seq(), _) =>
val name = nameParts.head
val attributes = collectMatches(name,
direct.get(name.toLowerCase(Locale.ROOT)))
- (attributes.filterNot(_.qualifiedAccessOnly), nameParts.tail)
+ (attributes.distinct.filterNot(_.qualifiedAccessOnly),
nameParts.tail)
Review Comment:
shall we fix `def unique` in this class? It should look at expr Id.
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