Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/20276#discussion_r162262776 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -318,7 +318,10 @@ class Analyzer( gid: Expression): Expression = { expr transform { case e: GroupingID => - if (e.groupByExprs.isEmpty || e.groupByExprs == groupByExprs) { + def sameExpressions(e1: Seq[Expression], e2: Seq[Expression]): Boolean = { --- End diff -- Anyway my PR exposed this bug as now `Dataset.col` returns a slightly different attribute with a metadata.
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