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

Interface EvaluationStrategyFactory

All Known Implementing Classes:
AbstractEvaluationStrategyFactory, DefaultEvaluationStrategyFactory, ExtendedEvaluationStrategyFactory, FederationEvaluationStrategyFactory, StrictEvaluationStrategyFactory
public interface EvaluationStrategyFactory
Factory for EvaluationStrategys.

  • Method Details

    • setQuerySolutionCacheThreshold

      @Deprecated void setQuerySolutionCacheThreshold(long threshold)
      Deprecated.
      Set the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.
      Parameters:
      threshold - the number of query solutions that the EvaluationStrategy can cache in main memory before attempting disk sync.

    • getQuerySolutionCacheThreshold

      long getQuerySolutionCacheThreshold()
      Get the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.

    • setOptimizerPipeline

      void setOptimizerPipeline(QueryOptimizerPipeline pipeline)
      Set a QueryOptimizerPipeline to be used for query execution planning by the EvaluationStrategy.
      Parameters:
      pipeline - a QueryOptimizerPipeline

    • getOptimizerPipeline

      Optional<QueryOptimizerPipeline> getOptimizerPipeline()
      Get the QueryOptimizerPipeline that this factory will inject into the EvaluationStrategy, if any. If no QueryOptimizerPipeline is defined, the EvaluationStrategy itself determines the pipeline.
      Returns:
      a QueryOptimizerPipeline, or Optional.empty() if no pipeline is set on this factory.

    • createEvaluationStrategy

      EvaluationStrategy createEvaluationStrategy(Dataset dataset, TripleSource tripleSource, EvaluationStatistics evaluationStatistics)
      Returns the EvaluationStrategy to use to evaluate queries for the given Dataset and TripleSource.
      Parameters:
      dataset - the DataSet to evaluate queries against.
      tripleSource - the TripleSource to evaluate queries against.
      evaluationStatistics - the store evaluation statistics to use for query optimization.
      Returns:
      an EvaluationStrategy.

    • isTrackResultSize

      default boolean isTrackResultSize()
      Returns the status of the result size tracking for the query plan. Useful to determine which parts of a query plan generated the most data.
      Returns:
      true if result size tracking is enabled.

    • setTrackResultSize

      default void setTrackResultSize(boolean trackResultSize)
      Enable or disable results size tracking for the query plan. Useful to determine which parts of a query plan generated the most data.
      Parameters:
      trackResultSize - true to enable tracking.

    • setCollectionFactory

      default void setCollectionFactory(Supplier<CollectionFactory> collectionFactory)
      Set the collection factory to use.
      Parameters:
      collectionFactory -