zhztheplayer commented on code in PR #7842: URL: https://github.com/apache/incubator-gluten/pull/7842#discussion_r1865400485
########## gluten-substrait/src/main/scala/org/apache/gluten/extension/columnar/UnionTransformerRule.scala: ########## @@ -0,0 +1,61 @@ +/* + * 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.gluten.extension.columnar + +import org.apache.gluten.GlutenConfig +import org.apache.gluten.execution.{ColumnarUnionExec, UnionExecTransformer} + +import org.apache.spark.sql.catalyst.plans.physical.UnknownPartitioning +import org.apache.spark.sql.catalyst.rules.Rule +import org.apache.spark.sql.execution.SparkPlan + +/** + * Replace ColumnarUnionExec with UnionExecTransformer if possible. + * + * The rule is not included in [[org.apache.gluten.extension.columnar.heuristic.HeuristicTransform]] + * or [[org.apache.gluten.extension.columnar.enumerated.EnumeratedTransform]] because it relies on + * children's output partitioning to be fully provided. + */ +case class UnionTransformerRule() extends Rule[SparkPlan] { + override def apply(plan: SparkPlan): SparkPlan = { + if (!GlutenConfig.getConf.enableNativeUnion) { + return plan + } + plan.transformUp { + case plan: ColumnarUnionExec => + val transformer = UnionExecTransformer(plan.children) + if (sameNumPartitions(plan.children) && validate(transformer)) { + transformer + } else { + plan + } + } + } + + private def sameNumPartitions(plans: Seq[SparkPlan]): Boolean = { Review Comment: Its purpose is to make the code self-explanatory. Say reader will know we are comparing the partition numbers of children because they see `sameNumPartitons` as method name. -- 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]
