peter-toth commented on code in PR #58273:
URL: https://github.com/apache/spark/pull/58273#discussion_r3863088585
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala:
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@@ -613,9 +613,12 @@ case class KeyedPartitioning(
val joinKeyPositions =
result.keyPositions.map(_.nonEmpty).zipWithIndex.filter(_._1).map(_._2)
val projectedExpressions = joinKeyPositions.map(expressions)
val projectedKeys = projectKeys(joinKeyPositions)._2
- val distinctProjectedKeys = projectedKeys.distinct
+ // Sort the distinct projected keys the same way `GroupPartitionsExec`
does. Otherwise, when
+ // only the keyed side is grouped and the other side is re-shuffled
using this spec, the two
+ // `KeyedPartitioning`s carry the same keys in a different order and
+ // `PartitioningCollection.fromPartitionings` rejects them.
val projectedPartitioning =
- KeyedPartitioning(projectedExpressions, distinctProjectedKeys,
isGrouped = true)
+ new KeyedPartitioning(projectedExpressions, projectedKeys, isGrouped =
false).toGrouped
Review Comment:
Here is the follow-up: https://github.com/apache/spark/pull/58311
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