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

Class QueryJoinOptimizer

java.lang.Object
org.eclipse.rdf4j.query.algebra.evaluation.impl.QueryJoinOptimizer
All Implemented Interfaces:
QueryOptimizer
@Deprecated(forRemoval=true, since="4.1.0") public class QueryJoinOptimizer extends Object implements QueryOptimizer
Deprecated, for removal: This API element is subject to removal in a future version.
A query optimizer that re-orders nested Joins.
Author:
Arjohn Kampman, James Leigh

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    protected class 
    QueryJoinOptimizer.JoinVisitor
    Deprecated.
    This class is protected for historic reasons only, and will be made private in a future major release.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected final EvaluationStatistics
    statistics
    Deprecated, for removal: This API element is subject to removal in a future version.
     

  • Constructor Summary

    Constructors
    Constructor
    Description
    QueryJoinOptimizer()
    Deprecated, for removal: This API element is subject to removal in a future version.
     
    QueryJoinOptimizer(EvaluationStatistics statistics)
    Deprecated, for removal: This API element is subject to removal in a future version.
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)
    Deprecated, for removal: This API element is subject to removal in a future version.
    Applies generally applicable optimizations: path expressions are sorted from more to less specific.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • statistics

      protected final EvaluationStatistics statistics
      Deprecated, for removal: This API element is subject to removal in a future version.

  • Constructor Details

    • QueryJoinOptimizer

      public QueryJoinOptimizer()
      Deprecated, for removal: This API element is subject to removal in a future version.

    • QueryJoinOptimizer

      public QueryJoinOptimizer(EvaluationStatistics statistics)
      Deprecated, for removal: This API element is subject to removal in a future version.

  • Method Details

    • optimize

      public void optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)
      Deprecated, for removal: This API element is subject to removal in a future version.
      Applies generally applicable optimizations: path expressions are sorted from more to less specific.
      Specified by:
      optimize in interface QueryOptimizer
      Parameters:
      tupleExpr -