Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16766#discussion_r99284809
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -2437,9 +2435,12 @@ class Dataset[T] private[sql](
* @group typedrel
* @since 1.6.0
*/
- def coalesce(numPartitions: Int): Dataset[T] = withTypedPlan {
- Repartition(numPartitions, shuffle = false, logicalPlan)
- }
+ def coalesce(numPartitions: Int, partitionCoalescer:
Option[PartitionCoalescer]): Dataset[T] =
+ withTypedPlan {
+ CoalesceLogical(numPartitions, partitionCoalescer, logicalPlan)
+ }
+
+ def coalesce(numPartitions: Int): Dataset[T] = coalesce(numPartitions,
None)
--- End diff --
Please also add the function description, like what we did in the other
functions in Dataset.scala?
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