Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/8083#discussion_r36693847
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala ---
@@ -162,7 +164,15 @@ case class Exchange(newPartitioning: Partitioning,
child: SparkPlan) extends Una
case _ => sys.error(s"Exchange not implemented for $newPartitioning")
// TODO: Handle BroadcastPartitioning.
}
- def getPartitionKeyExtractor(): InternalRow => InternalRow =
newPartitioning match {
+ def getPartitionKeyExtractor(): InternalRow => Any = newPartitioning
match {
+ case RandomPartitioning(numPartitions) =>
+ // Distributes elements evenly across output partitions, starting
from a random partition.
--- End diff --
This is based off the implementation of Repartition in `RDD.scala`.
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