org.openrdf.sail.memory
Class MemoryStoreConnection.MemEvaluationStatistics

java.lang.Object
  org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics
      org.openrdf.sail.memory.MemoryStoreConnection.MemEvaluationStatistics

Enclosing class:

MemoryStoreConnection

protected class MemoryStoreConnection.MemEvaluationStatistics
extends EvaluationStatistics

Uses the MemoryStore's statement sizes to give cost estimates based on the size of the expected results. This process could be improved with repository statistics about size and distribution of statements.

Author:

Arjohn Kampman, James Leigh

Nested Class Summary

protected class

MemoryStoreConnection.MemEvaluationStatistics.MemCardinalityCalculator

Nested classes/interfaces inherited from class org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics

EvaluationStatistics.CardinalityCalculator

Field Summary

Fields inherited from class org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics

cc

Constructor Summary

protected

MemoryStoreConnection.MemEvaluationStatistics()

Method Summary

protected EvaluationStatistics.CardinalityCalculator

createCardinalityCalculator()

Methods inherited from class org.openrdf.query.algebra.evaluation.impl.EvaluationStatistics

getCardinality

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryStoreConnection.MemEvaluationStatistics

protected MemoryStoreConnection.MemEvaluationStatistics()

Method Detail

createCardinalityCalculator

protected EvaluationStatistics.CardinalityCalculator createCardinalityCalculator()

Overrides:

createCardinalityCalculator in class EvaluationStatistics