com.bigdata.bop.cost

Class SubqueryCostReport

java.lang.Object

com.bigdata.bop.cost.SubqueryCostReport

All Implemented Interfaces:

Serializable

public class SubqueryCostReport
extends Object
implements Serializable

Subquery cost report.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
double	cost An estimated cost (latency in milliseconds) based on the samples and adjusted for the #of graphs.
int	limit The #of samples to be taken.
int	ngraphs The #of graphs against which subqueries will be issued.
int	nsamples The #of samples taken.
long	rangeCount An estimated range count based on the samples and adjusted for the #of graphs.

Constructor Summary

Constructors

Constructor and Description
SubqueryCostReport(int ngraphs, int limit, int nsamples, long rangeCount, double cost)

Method Summary

Methods

Modifier and Type	Method and Description
String	toString() Human readable representation.

Methods inherited from class java.lang.Object

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

Field Detail

ngraphs

public final int ngraphs

The #of graphs against which subqueries will be issued.

limit

public final int limit

The #of samples to be taken.

nsamples

public final int nsamples

The #of samples taken.

rangeCount

public final long rangeCount

An estimated range count based on the samples and adjusted for the #of graphs.

cost

public final double cost

An estimated cost (latency in milliseconds) based on the samples and adjusted for the #of graphs.

Constructor Detail

SubqueryCostReport

public SubqueryCostReport(int ngraphs,
                  int limit,
                  int nsamples,
                  long rangeCount,
                  double cost)

Parameters:

ngraphs - The #of graphs against which subqueries will be issued.

limit - The #of samples to be taken.

nsamples - The #of samples taken.

rangeCount - An estimated range count based on the samples and adjusted for the #of graphs.

cost - An estimated cost (latency in milliseconds) based on the samples and adjusted for the #of graphs.

Method Detail

toString

public String toString()

Human readable representation.

Overrides:

toString in class Object