Package org.eclipse.rdf4j.federated.optimizer

Interface FedXCostModel

All Known Implementing Classes:
DefaultFedXCostModel
public interface FedXCostModel
Interface for a cost model used in StatementGroupAndJoinOptimizer.
Author:
Andreas Schwarte

  • Method Summary

    Modifier and Type
    Method
    Description
    double
    estimateCost(TupleExpr tupleExpr, Set<String> joinVars)
    Return the estimated cost for the given TupleExpr

  • Method Details

    • estimateCost

      double estimateCost(TupleExpr tupleExpr, Set<String> joinVars)
      Return the estimated cost for the given TupleExpr
      Parameters:
      tupleExpr -
      joinVars -
      Returns:
      the cost associated to the tupleExpr