ulysses-you commented on code in PR #43435:
URL: https://github.com/apache/spark/pull/43435#discussion_r1375905803
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala:
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@@ -708,6 +736,26 @@ case class HashShuffleSpec(
override def numPartitions: Int = partitioning.numPartitions
}
+case class CoalescedHashShuffleSpec(
+ from: ShuffleSpec,
+ @transient partitions: Seq[CoalescedBoundary]) extends ShuffleSpec {
Review Comment:
It is to avoid unnecessary ser/de. We only use it to check if compatible
with other shuffle spec at driver side.
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