Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/16970#discussion_r101871892
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/statefulOperators.scala
---
@@ -321,3 +327,66 @@ case class MapGroupsWithStateExec(
}
}
}
+
+
+/** Physical operator for executing streaming Deduplication. */
+case class StreamingDeduplicationExec(
+ keyExpressions: Seq[Attribute],
+ child: SparkPlan,
+ stateId: Option[OperatorStateId] = None,
+ eventTimeWatermark: Option[Long] = None)
+ extends UnaryExecNode with StateStoreWriter with WatermarkSupport {
+
+ /** Distribute by grouping attributes */
+ override def requiredChildDistribution: Seq[Distribution] =
+ ClusteredDistribution(keyExpressions) :: Nil
+
+ override protected def doExecute(): RDD[InternalRow] = {
+ metrics // force lazy init at driver
+
+ child.execute().mapPartitionsWithStateStore(
+ getStateId.checkpointLocation,
+ operatorId = getStateId.operatorId,
--- End diff --
nit: why are these two specified with param names?
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