InterestingProperties (Flink : Optimizer 1.18.1-cp2 API)

java.lang.Object
- org.apache.flink.optimizer.dataproperties.InterestingProperties

All Implemented Interfaces:

Cloneable
```
public class InterestingProperties
extends Object
implements Cloneable
```
Interesting properties are propagated from parent operators to child operators. They tell the child what data properties would help the parent in operating in a cheaper fashion. A reduce operator, for example, tells its child that partitioned data would help. If the child is a join operator, it can use that knowledge to favor strategies that leave the data in a partitioned form.
More on optimization with interesting properties can be found in the works on the volcano- and cascades optimizer framework.

Constructor Summary

Constructors
Constructor Description

InterestingProperties()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addGlobalProperties(RequestedGlobalProperties props)`
`void`	`addInterestingProperties(InterestingProperties other)`
`void`	`addLocalProperties(RequestedLocalProperties props)`
`InterestingProperties`	`clone()`
`void`	`dropTrivials()`
`boolean`	`equals(Object obj)`
`InterestingProperties`	`filterByCodeAnnotations(OptimizerNode node, int input)`
`Set<RequestedGlobalProperties>`	`getGlobalProperties()`	Gets the interesting global properties.
`Set<RequestedLocalProperties>`	`getLocalProperties()`	Gets the interesting local properties.
`int`	`hashCode()`
`String`	`toString()`

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail
- InterestingProperties
```
public InterestingProperties()
```

Method Detail

addGlobalProperties

public void addGlobalProperties(RequestedGlobalProperties props)

addLocalProperties

public void addLocalProperties(RequestedLocalProperties props)

addInterestingProperties

public void addInterestingProperties(InterestingProperties other)

getLocalProperties
```
public Set<RequestedLocalProperties> getLocalProperties()
```
Gets the interesting local properties.

Returns:

The interesting local properties.

getGlobalProperties
```
public Set<RequestedGlobalProperties> getGlobalProperties()
```
Gets the interesting global properties.

Returns:

The interesting global properties.

filterByCodeAnnotations

public InterestingProperties filterByCodeAnnotations(OptimizerNode node,
                                                     int input)

dropTrivials
```
public void dropTrivials()
```

hashCode
```
public int hashCode()
```
Overrides:

hashCode in class Object

equals
```
public boolean equals(Object obj)
```
Overrides:

equals in class Object

toString
```
public String toString()
```
Overrides:

toString in class Object

clone
```
public InterestingProperties clone()
```
Overrides:

clone in class Object