Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/20800#discussion_r174016939
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -511,6 +511,14 @@ class Dataset[T] private[sql](
*/
def isLocal: Boolean = logicalPlan.isInstanceOf[LocalRelation]
+ /**
+ * Returns true if the `DataSet` is empty
--- End diff --
Dataset
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