Github user kiszk commented on a diff in the pull request: https://github.com/apache/spark/pull/19454#discussion_r143351442 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -2543,6 +2543,11 @@ class Dataset[T] private[sql]( mapPartitions(_.flatMap(func)) /** + * Returns a new Dataset by by flattening a traversable collection into a collection itself. + */ --- End diff -- Could you please add `@since 2.3.0`?
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