Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/13526#discussion_r69986245
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala ---
@@ -65,6 +65,46 @@ class KeyValueGroupedDataset[K, V] private[sql](
groupingAttributes)
/**
+ * Returns a new [[KeyValueGroupedDataset]] where the given function has
been applied to the
+ * data. The grouping key is unchanged by this.
+ *
+ * {{{
+ * // Create values grouped by key from a Dataset[(K, V)]
+ * ds.groupByKey(_._1).mapValues(_._2) // Scala
+ * }}}
+ * @since 2.0.0
+ */
+ def mapValues[W: Encoder](func: V => W): KeyValueGroupedDataset[K, W] = {
--- End diff --
...while here `W: Encoder` only after `:`. Why is this inconsistency?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
