maryannxue commented on a change in pull request #27493: [SPARK-30751][SQL] Combine the skewed readers into one in AQE skew join optimizations URL: https://github.com/apache/spark/pull/27493#discussion_r377121668
########## File path: sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/CustomShuffledRowRDD.scala ########## @@ -0,0 +1,113 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.sql.execution.adaptive + +import org.apache.spark.{Dependency, MapOutputTrackerMaster, Partition, ShuffleDependency, SparkEnv, TaskContext} +import org.apache.spark.rdd.RDD +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.execution.metric.{SQLMetric, SQLShuffleReadMetricsReporter} + +sealed trait ShufflePartitionSpec + +// A partition that reads data of one reducer. +case class NormalPartitionSpec(reducerIndex: Int) extends ShufflePartitionSpec + +// A partition that reads data of multiple reducers, from `startReducerIndex` (inclusive) to +// `endReducerIndex` (exclusive). +case class CoalescedPartitionSpec( + startReducerIndex: Int, endReducerIndex: Int) extends ShufflePartitionSpec + +// A partition that reads partial data of one reducer, from `startMapIndex` (inclusive) to +// `endMapIndex` (exclusive). +case class PartialPartitionSpec( + reducerIndex: Int, startMapIndex: Int, endMapIndex: Int) extends ShufflePartitionSpec + +private final case class CustomShufflePartition( + index: Int, spec: ShufflePartitionSpec) extends Partition + +// TODO: merge this with `ShuffledRowRDD`. Review comment: nit: Add "TODO, replace LocalShuffledRowRDD with this RDD" ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
