org.apache.spark.sql.catalyst.plans.logical.statsEstimation.BasicStatsPlanVisitor.scala Maven / Gradle / Ivy
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* 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
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package org.apache.spark.sql.catalyst.plans.logical.statsEstimation
import org.apache.spark.sql.catalyst.plans.logical._
/**
* A [[LogicalPlanVisitor]] that computes the statistics for the cost-based optimizer.
*/
object BasicStatsPlanVisitor extends LogicalPlanVisitor[Statistics] {
/** Falls back to the estimation computed by [[SizeInBytesOnlyStatsPlanVisitor]]. */
private def fallback(p: LogicalPlan): Statistics = SizeInBytesOnlyStatsPlanVisitor.visit(p)
override def default(p: LogicalPlan): Statistics = fallback(p)
override def visitAggregate(p: Aggregate): Statistics = {
AggregateEstimation.estimate(p).getOrElse(fallback(p))
}
override def visitDistinct(p: Distinct): Statistics = fallback(p)
override def visitExcept(p: Except): Statistics = fallback(p)
override def visitExpand(p: Expand): Statistics = fallback(p)
override def visitFilter(p: Filter): Statistics = {
FilterEstimation(p).estimate.getOrElse(fallback(p))
}
override def visitGenerate(p: Generate): Statistics = fallback(p)
override def visitGlobalLimit(p: GlobalLimit): Statistics = fallback(p)
override def visitHint(p: ResolvedHint): Statistics = fallback(p)
override def visitIntersect(p: Intersect): Statistics = fallback(p)
override def visitJoin(p: Join): Statistics = {
JoinEstimation(p).estimate.getOrElse(fallback(p))
}
override def visitLocalLimit(p: LocalLimit): Statistics = fallback(p)
override def visitPivot(p: Pivot): Statistics = fallback(p)
override def visitProject(p: Project): Statistics = {
ProjectEstimation.estimate(p).getOrElse(fallback(p))
}
override def visitRepartition(p: Repartition): Statistics = fallback(p)
override def visitRepartitionByExpr(p: RepartitionByExpression): Statistics = fallback(p)
override def visitSample(p: Sample): Statistics = fallback(p)
override def visitScriptTransform(p: ScriptTransformation): Statistics = fallback(p)
override def visitUnion(p: Union): Statistics = fallback(p)
override def visitWindow(p: Window): Statistics = fallback(p)
}