hvanhovell commented on code in PR #45701:
URL: https://github.com/apache/spark/pull/45701#discussion_r1557934162


##########
connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/Dataset.scala:
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@@ -131,13 +131,25 @@ import org.apache.spark.util.SparkClassUtils
 class Dataset[T] private[sql] (
     val sparkSession: SparkSession,
     @DeveloperApi val plan: proto.Plan,
-    val encoder: Encoder[T])
+    val encoder: Encoder[T],
+    @DeveloperApi carryOverObservationsOpt: Option[Map[String, Observation]] = 
None)

Review Comment:
   How well does this work with plugins? Now everyone working on the scala 
client needs to be aware that they need to carry over this map. I much prefer 
that we send back the plan_id of the CollectMetrics node in the 
`ObservedMetrics` node.



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