WeightedOptimiser Class

The Weighted Optimiser is a Query Optimiser that orders Triple Patterns based on weighting computed calculated against.

Inheritance Hierarchy

SystemObject
VDS.RDF.Query.OptimisationBaseQueryOptimiser
VDS.RDF.Query.OptimisationWeightedOptimiser

Namespace: VDS.RDF.Query.Optimisation
Assembly: dotNetRDF (in dotNetRDF.dll) Version:

Syntax

public class WeightedOptimiser : BaseQueryOptimiser

Public Class WeightedOptimiser
	Inherits BaseQueryOptimiser

The WeightedOptimiser type exposes the following members.

Constructors

	Name	Description
	WeightedOptimiser	Creates a new Weighted Optimiser.
	WeightedOptimiser(IGraph)	Creates a new Weighted Optimiser which reads weights from the given RDF Graph.
	WeightedOptimiser(IGraph, Double, Double, Double)	Creates a new Weighted Optimiser which reads weights from the given RDF Graph.

Properties

	Name	Description
	ShouldPlaceAssignments	Controls whether the Optimiser will place Assignments. (Inherited from BaseQueryOptimiser.)
	ShouldPlaceFilters	Controls whether the Optimiser will place Filters. (Inherited from BaseQueryOptimiser.)
	ShouldReorder	Controls whether the Optimiser will attempt to reorder Triple Patterns. (Inherited from BaseQueryOptimiser.)
	ShouldSplitFilters	Controls whether the Optimiser will split Filters. (Inherited from BaseQueryOptimiser.)

Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetRankingComparer	Gets the comparer used to order the Triple Patterns based on their computed weightings. (Overrides BaseQueryOptimiserGetRankingComparer.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Optimise	Causes the Graph Pattern to be optimised if it isn't already. (Inherited from BaseQueryOptimiser.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

Fields

	Name	Description
	DefaultObjectWeight	Default Weight for Object Terms.
	DefaultPredicateWeight	Default Weight for Predicate Terms.
	DefaultSubjectWeight	Default Weight for Subject Terms.
	DefaultVariableWeight	Default Weight for Variables.