org.openrdf.query.algebra.evaluation.impl
Class EvaluationStatistics

java.lang.Object
  org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics

Direct Known Subclasses:

MemoryStoreConnection.MemEvaluationStatistics

public class EvaluationStatistics
extends Object

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

Author:

Arjohn Kampman, James Leigh

Nested Class Summary

protected static class

EvaluationStatistics.CardinalityCalculator

Constructor Summary

EvaluationStatistics()

Method Summary

double	getCardinality(TupleExpr expr)
double	getCardinality(TupleExpr expr, Set<String> boundVars)
protected EvaluationStatistics.CardinalityCalculator	getCardinalityCalculator(Set<String> boundVars)

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)

getCardinality

public double getCardinality(TupleExpr expr,
                             Set<String> boundVars)

getCardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator getCardinalityCalculator(Set<String> boundVars)