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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/07/13 03:12:31 UTC

[GitHub] [spark] HyukjinKwon commented on a change in pull request #33310: [WIP][SPARK-36105][SQL] OptimizeLocalShuffleReader support reading data of multiple mappers in one task

HyukjinKwon commented on a change in pull request #33310:
URL: https://github.com/apache/spark/pull/33310#discussion_r668394926



##########
File path: sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
##########
@@ -58,6 +58,11 @@ case class PartialMapperPartitionSpec(
     startReducerIndex: Int,
     endReducerIndex: Int) extends ShufflePartitionSpec
 
+case class CoalescedMapperPartitionSpec(
+                                         startMapIndex: Int,
+                                         endMapIndex: Int,
+                                         numReducers: Int) extends ShufflePartitionSpec

Review comment:
       ```suggestion
       startMapIndex: Int,
       endMapIndex: Int,
       numReducers: Int) extends ShufflePartitionSpec
   ```




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