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jvm/src/main/scala/io/glutenproject/extension/ColumnarQueryStagePrepRule.scala
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| /* | ||
| * 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. | ||
| */ | ||
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| package io.glutenproject.extension | ||
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| import io.glutenproject.{GlutenConfig, GlutenSparkExtensionsInjector} | ||
| import io.glutenproject.execution.BroadcastHashJoinExecTransformer | ||
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| import org.apache.spark.sql.{SparkSession, SparkSessionExtensions} | ||
| import org.apache.spark.sql.catalyst.rules.Rule | ||
| import org.apache.spark.sql.catalyst.trees.TreeNodeTag | ||
| import org.apache.spark.sql.execution.SparkPlan | ||
| import org.apache.spark.sql.execution.exchange.{BroadcastExchangeExec, ReusedExchangeExec} | ||
| import org.apache.spark.sql.execution.joins.BroadcastHashJoinExec | ||
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| // RowGuardTag is useful to transform the plan and add guard tag before creating new QueryStages. | ||
| // | ||
| // e.g. BroadcastHashJoinExec and it's child BroadcastExec will be cut into different QueryStages, | ||
| // so the columnar rules will be applied to the two QueryStages separately, and they cannot | ||
| // see each other during transformation. In order to prevent BroadcastExec being transformed | ||
| // to columnar while BHJ fallbacks, we can add RowGuardTag to BroadcastExec when applying | ||
| // queryStagePrepRules and check the tag when applying columnarRules. | ||
| // RowGuardTag will be ignored if the plan is already guarded by RowGuard. | ||
| object RowGuardTag { | ||
| val key: TreeNodeTag[Boolean] = TreeNodeTag[Boolean]("RowGuard") | ||
| val value: Boolean = true | ||
| } | ||
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| case class ColumnarQueryStagePrepRule(session: SparkSession) extends Rule[SparkPlan] { | ||
| override def apply(plan: SparkPlan): SparkPlan = { | ||
| val columnarConf: GlutenConfig = GlutenConfig.getSessionConf | ||
| plan.transformDown { | ||
| case bhj: BroadcastHashJoinExec => | ||
| if (columnarConf.enableColumnarBroadcastExchange && | ||
| columnarConf.enableColumnarBroadcastJoin) { | ||
| val transformer = BroadcastHashJoinExecTransformer( | ||
| bhj.leftKeys, | ||
| bhj.rightKeys, | ||
| bhj.joinType, | ||
| bhj.buildSide, | ||
| bhj.condition, | ||
| bhj.left, | ||
| bhj.right, | ||
| bhj.isNullAwareAntiJoin) | ||
| if (!transformer.doValidate()) { | ||
| bhj.children.map { | ||
| // ResuedExchange is not created yet, so we don't need to handle that case. | ||
| case e: BroadcastExchangeExec => AddRowGuardTag(e) | ||
| case plan => plan | ||
| } | ||
| } | ||
| } | ||
| bhj | ||
| case plan => plan | ||
| } | ||
| } | ||
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| def AddRowGuardTag(plan: SparkPlan): SparkPlan = { | ||
| plan.setTagValue(RowGuardTag.key, RowGuardTag.value) | ||
| plan | ||
| } | ||
| } | ||
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| object ColumnarQueryStagePreparations extends GlutenSparkExtensionsInjector { | ||
| override def inject(extensions: SparkSessionExtensions): Unit = { | ||
| extensions.injectQueryStagePrepRule(ColumnarQueryStagePrepRule) | ||
| } | ||
| } | ||
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