spark ValidateSparkPlan 源码
spark ValidateSparkPlan 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/ValidateSparkPlan.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.optimizer.{BuildLeft, BuildRight}
import org.apache.spark.sql.catalyst.rules.Rule
import org.apache.spark.sql.execution.SparkPlan
import org.apache.spark.sql.execution.joins.{BroadcastHashJoinExec, BroadcastNestedLoopJoinExec}
/**
* Detects invalid physical plans generated by AQE replanning and throws `InvalidAQEPlanException`
* if such plans are detected. This rule should be called after EnsureRequirements where all
* necessary Exchange nodes are added.
*/
object ValidateSparkPlan extends Rule[SparkPlan] {
def apply(plan: SparkPlan): SparkPlan = {
validate(plan)
plan
}
/**
* Validate that the plan satisfies the following condition:
* - BroadcastQueryStage only appears as the immediate child and the build side of a broadcast
* hash join or broadcast nested loop join.
*/
private def validate(plan: SparkPlan): Unit = plan match {
case b: BroadcastHashJoinExec =>
val (buildPlan, probePlan) = b.buildSide match {
case BuildLeft => (b.left, b.right)
case BuildRight => (b.right, b.left)
}
if (!buildPlan.isInstanceOf[BroadcastQueryStageExec]) {
validate(buildPlan)
}
validate(probePlan)
case b: BroadcastNestedLoopJoinExec =>
val (buildPlan, probePlan) = b.buildSide match {
case BuildLeft => (b.left, b.right)
case BuildRight => (b.right, b.left)
}
if (!buildPlan.isInstanceOf[BroadcastQueryStageExec]) {
validate(buildPlan)
}
validate(probePlan)
case q: BroadcastQueryStageExec => errorOnInvalidBroadcastQueryStage(q)
case _ => plan.children.foreach(validate)
}
private def errorOnInvalidBroadcastQueryStage(plan: SparkPlan): Unit = {
throw InvalidAQEPlanException("Invalid broadcast query stage", plan)
}
}
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