Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/14527#discussion_r74187346 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -1865,7 +1865,7 @@ class Dataset[T] private[sql]( val resolver = sparkSession.sessionState.analyzer.resolver val allColumns = queryExecution.analyzed.output val groupCols = colNames.map { colName => - allColumns.find(col => resolver(col.name, colName)).getOrElse( + allColumns.find(col => resolver(col.qualifiedName, colName)).getOrElse( --- End diff -- Oops. My bad. Thank you for review, @cloud-fan . I will add that case and update the PR to handle both.
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