Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/11083#discussion_r53563435
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
---
@@ -76,6 +77,27 @@ case class OrderedDistribution(ordering: Seq[SortOrder])
extends Distribution {
}
/**
+ * Marker trait to identify the shape in which tuples are broadcasted.
Typical examples of this are
+ * identity (tuples remain unchanged) or hashed (tuples are converted into
some hash index).
+ */
+trait BroadcastMode {
--- End diff --
I'd move this and IdentityBroadcastMode into its own file.
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