spark AQEShuffleReadRule 源码
spark AQEShuffleReadRule 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/AQEShuffleReadRule.scala
/*
* 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.sql.catalyst.rules.Rule
import org.apache.spark.sql.execution.SparkPlan
import org.apache.spark.sql.execution.exchange.{ShuffleExchangeLike, ShuffleOrigin}
/**
* A rule that may create [[AQEShuffleReadExec]] on top of [[ShuffleQueryStageExec]] and change the
* plan output partitioning. The AQE framework will skip the rule if it leads to extra shuffles.
*/
trait AQEShuffleReadRule extends Rule[SparkPlan] {
/**
* Returns the list of [[ShuffleOrigin]]s supported by this rule.
*/
protected def supportedShuffleOrigins: Seq[ShuffleOrigin]
protected def isSupported(shuffle: ShuffleExchangeLike): Boolean = {
supportedShuffleOrigins.contains(shuffle.shuffleOrigin)
}
}
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