Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/22219#discussion_r212856674
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -3237,6 +3237,20 @@ class Dataset[T] private[sql](
files.toSet.toArray
}
+ def collectCountAndIterator(): (Long, Iterator[T]) =
--- End diff --
We can always make it public later if there is such requirement. We should
be careful to add public api.
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