Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20800#discussion_r173812290
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -511,6 +511,12 @@ class Dataset[T] private[sql](
*/
def isLocal: Boolean = logicalPlan.isInstanceOf[LocalRelation]
+ /**
+ * Returns true if the `DataSet` is empty
+ *
--- End diff --
this would need a
```
@since 2.4.0
```
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