zml1206 commented on code in PR #6093: URL: https://github.com/apache/incubator-gluten/pull/6093#discussion_r1642176619
########## shims/spark35/src/main/scala/org/apache/spark/sql/execution/adaptive/GlutenCostEvaluator.scala: ########## @@ -0,0 +1,41 @@ +/* + * 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.SQLConfHelper +import org.apache.spark.sql.execution.SparkPlan +import org.apache.spark.sql.execution.joins.ShuffledJoin +import org.apache.spark.sql.internal.SQLConf + +/** + * This [[CostEvaluator]] is to force use the new physical plan when AQE's new physical plan + * contains [[ShuffledJoin]] and cost is the same. + */ +case class GlutenCostEvaluator() extends CostEvaluator with SQLConfHelper { + private var isReOptimize = false + override def evaluateCost(plan: SparkPlan): Cost = { + val forceOptimizeSkewedJoin = conf.getConf(SQLConf.ADAPTIVE_FORCE_OPTIMIZE_SKEWED_JOIN) + val simpleCost = + SimpleCostEvaluator(forceOptimizeSkewedJoin).evaluateCost(plan).asInstanceOf[SimpleCost] + var cost = simpleCost.value * 2 + if (isReOptimize && plan.exists(_.isInstanceOf[ShuffledJoin])) { Review Comment: I have considered it before, but doing this requires a lot of cost. First, need to add extra rule to add tags. Secondly, when the plan contains multiple joins, it is not easy to judge which join is about to be executed. I just modified cost equal. If the costs are equal, it is forced to use new physics plan, which doesn't seem to hurt. -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
