Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/11083#discussion_r52957703
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala ---
@@ -143,6 +159,14 @@ abstract class SparkPlan extends QueryPlan[SparkPlan]
with Logging with Serializ
protected def doExecute(): RDD[InternalRow]
/**
+ * Overridden by concrete implementations of SparkPlan.
+ * Produces the result of the query as a broadcast variable.
+ */
+ protected[sql] def doExecuteBroadcast[T](): broadcast.Broadcast[T] = {
+ throw new NotImplementedError(s"$nodeName does not implement
doExecuteBroadcast")
--- End diff --
UnsupportedOperationException ?
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