Class FederationEvaluationStatistics

java.lang.Object

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

org.eclipse.rdf4j.federated.evaluation.FederationEvaluationStatistics

public class FederationEvaluationStatistics
extends EvaluationStatistics

Stateful EvaluationStatistics providing information for evaluating a given query in FederationEvaluationStrategy.optimize(org.eclipse.rdf4j.query.algebra.TupleExpr, EvaluationStatistics, org.eclipse.rdf4j.query.BindingSet)

The statistics are instantiated per query.

Author:

Andreas Schwarte

Nested Class Summary

Nested classes/interfaces inherited from class EvaluationStatistics

EvaluationStatistics.CardinalityCalculator, EvaluationStatistics.FilterPassEstimate

Modifier and Type	Class	Description
protected static class	EvaluationStatistics.CardinalityCalculator
static final class	EvaluationStatistics.FilterPassEstimate

Constructor Summary

Constructors

Constructor	Description
FederationEvaluationStatistics(QueryInfo queryInfo, Dataset dataset)

Method Summary

Modifier and Type	Method	Description
Dataset	getDataset()
QueryInfo	getQueryInfo()

Methods inherited from class EvaluationStatistics

createCardinalityCalculator, estimateFilterPass, estimateFilterPassRatio, getCardinality, recordFilterOutcome, supportsFilterSelectivityCosting, supportsJoinEstimation

Modifier and Type	Method	Description
protected EvaluationStatistics.CardinalityCalculator	createCardinalityCalculator()
EvaluationStatistics.FilterPassEstimate	estimateFilterPass(Filter filter)
double	estimateFilterPassRatio(Filter filter)
double	getCardinality(TupleExpr expr)
void	recordFilterOutcome(Filter filter, long passedCount, long filteredCount)
boolean	supportsFilterSelectivityCosting()
boolean	supportsJoinEstimation()

Methods inherited from class Object

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

Constructor Details

FederationEvaluationStatistics

public FederationEvaluationStatistics(QueryInfo queryInfo,
 Dataset dataset)

Method Details

getQueryInfo

public QueryInfo getQueryInfo()

getDataset

public Dataset getDataset()