InterestingPropertyVisitor (Flink : Optimizer 1.18.1-cp2 API)

java.lang.Object
- org.apache.flink.optimizer.traversals.InterestingPropertyVisitor

All Implemented Interfaces:

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.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  InterestingPropertyVisitor(CostEstimator estimator)
  Creates a new visitor that computes the interesting properties for all nodes in the plan.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void postVisit(OptimizerNode visitable)
  
  boolean preVisit(OptimizerNode node)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - 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.
    
    Parameters:
    
    estimator - The cost estimator to estimate the maximal costs for interesting properties.
- Method Detail
  - preVisit
```
public boolean preVisit(OptimizerNode node)
```
    Specified by:
    
    preVisit in interface org.apache.flink.util.Visitor<OptimizerNode>
  - postVisit
```
public void postVisit(OptimizerNode visitable)
```
    Specified by:
    
    postVisit in interface org.apache.flink.util.Visitor<OptimizerNode>