Github user tdas commented on a diff in the pull request: https://github.com/apache/spark/pull/19467#discussion_r144402006 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala --- @@ -243,8 +246,9 @@ case class HashPartitioning(expressions: Seq[Expression], numPartitions: Int) override def satisfies(required: Distribution): Boolean = required match { case UnspecifiedDistribution => true - case ClusteredDistribution(requiredClustering) => - expressions.forall(x => requiredClustering.exists(_.semanticEquals(x))) + case ClusteredDistribution(requiredClustering, desiredPartitions) => + expressions.forall(x => requiredClustering.exists(_.semanticEquals(x))) && + desiredPartitions.forall(_ == numPartitions) // if desiredPartition = true, returns true --- End diff -- // if desiredPartition**s** is **None**, return true
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