org.apache.flink.optimizer.traversals

类 InterestingPropertyVisitor

java.lang.Object

org.apache.flink.optimizer.traversals.InterestingPropertyVisitor

所有已实现的接口:

org.apache.flink.util.Visitor<OptimizerNode>

public class InterestingPropertyVisitor
extends Object
implements org.apache.flink.util.Visitor<OptimizerNode>

Visitor that computes the interesting properties for each node in the optimizer DAG. On its recursive depth-first descend, it propagates all interesting properties top-down.

构造器概要

构造器

构造器和说明
InterestingPropertyVisitor(CostEstimator estimator) Creates a new visitor that computes the interesting properties for all nodes in the plan.

方法概要

限定符和类型	方法和说明
void	postVisit(OptimizerNode visitable)
boolean	preVisit(OptimizerNode node)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

InterestingPropertyVisitor

public InterestingPropertyVisitor(CostEstimator estimator)

Creates a new visitor that computes the interesting properties for all nodes in the plan. It uses the given cost estimator used to compute the maximal costs for an interesting property.

参数:

estimator - The cost estimator to estimate the maximal costs for interesting properties.

方法详细资料

preVisit

public boolean preVisit(OptimizerNode node)

指定者:

preVisit 在接口中 org.apache.flink.util.Visitor<OptimizerNode>

postVisit

public void postVisit(OptimizerNode visitable)

指定者:

postVisit 在接口中 org.apache.flink.util.Visitor<OptimizerNode>