Class ExtensibleConstantEvaluationStatistics

java.lang.Object

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

org.eclipse.rdf4j.sail.extensiblestore.evaluationstatistics.ExtensibleEvaluationStatistics

org.eclipse.rdf4j.sail.extensiblestore.evaluationstatistics.ExtensibleConstantEvaluationStatistics

@Experimental
public class ExtensibleConstantEvaluationStatistics
extends ExtensibleEvaluationStatistics

ExtensibleDirectEvaluationStatistics provides evaluation statistics by using the default implementation. The default implementation uses constants to return cardinalities for various patterns.

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
ExtensibleConstantEvaluationStatistics(ExtensibleSailStore extensibleSailStore)

Method Summary

Modifier and Type	Method	Description
protected EvaluationStatistics.CardinalityCalculator	createCardinalityCalculator()

Methods inherited from class EvaluationStatistics

estimateFilterPass, estimateFilterPassRatio, getCardinality, recordFilterOutcome, supportsFilterSelectivityCosting, supportsJoinEstimation

Modifier and Type	Method	Description
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

ExtensibleConstantEvaluationStatistics

public ExtensibleConstantEvaluationStatistics(ExtensibleSailStore extensibleSailStore)

Method Details

createCardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator createCardinalityCalculator()

Specified by:

createCardinalityCalculator in class ExtensibleEvaluationStatistics