WweiL commented on code in PR #41558:
URL: https://github.com/apache/spark/pull/41558#discussion_r1231407237
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connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala:
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@@ -462,6 +462,15 @@ abstract class KeyValueGroupedDataset[K, V] private[sql]
() extends Serializable
UdfUtils.coGroupFunctionToScalaFunc(f))(encoder)
}
+ protected def flatMapGroupsWithStateHelper[S: Encoder, U: Encoder](
+ outputMode: OutputMode,
+ timeoutConf: GroupStateTimeout,
+ initialState: KeyValueGroupedDataset[K, S],
Review Comment:
I feel this helper method shouldn't appear there. Is this change because of
this comment? https://github.com/apache/spark/pull/41558#discussion_r1227337649
I actually think it's good to use the original implementation, i.e. have a
dedicated `flatMapGroupsWithState` and `mapGroupsWIthState` that handles all
cases respectively, this also follows the original API design:
https://github.com/apache/spark/blob/28869401eff8fcd94aa68d662fdd4d3dbe2f58af/sql/core/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala
But we could also just use an ultimate `flatMapGroupsWithState` that
achieves the same goal as @zhenlineo suggested and still delete this helper
method.
Sorry for the back and forth. @zhenlineo @bogao007 wdyt?
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