Package org.eclipse.rdf4j.query.algebra.evaluation.impl

Class EvaluationStatistics

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.impl.EvaluationStatistics

Direct Known Subclasses:

ExtensibleEvaluationStatistics, FederationEvaluationStatistics, TupleFunctionEvaluationStatistics

public class EvaluationStatistics
extends Object

Supplies various query model statistics to the query engine/optimizer.

Author:

Arjohn Kampman, James Leigh

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	EvaluationStatistics.CardinalityCalculator

Constructor Summary

Constructors

Constructor	Description
EvaluationStatistics()

Method Summary

Modifier and Type	Method	Description
protected EvaluationStatistics.CardinalityCalculator	createCardinalityCalculator()
double	getCardinality(TupleExpr expr)

Methods inherited from class java.lang.Object

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

Constructor Detail

EvaluationStatistics

public EvaluationStatistics()

Method Detail

getCardinality

public double getCardinality(TupleExpr expr)

createCardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator createCardinalityCalculator()