org.apache.flink.optimizer.dataproperties

Class InterestingProperties

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 and Description
InterestingProperties()

Method Summary

Modifier and Type	Method and 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