Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/13370#discussion_r65126050
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala ---
@@ -204,8 +205,8 @@ class KeyValueGroupedDataset[K, V] private[sql](
* Internal helper function for building typed aggregations that return
tuples. For simplicity
* and code reuse, we do this without the help of the type system and
then use helper functions
* that cast appropriately for the user facing interface.
- * TODO: does not handle aggregations that return nonflat results,
*/
+ // TODO: does not handle aggregations that return nonflat results.
--- End diff --
cool i will remove it
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