VirtualAlgebraOptimiser<TNodeID, TGraphID> Class

Abstract implementation of an algebra optimiser and expression transformer which optimises the algebra to replace any Node terms with Virtual Node terms for more efficient querying of virtualised RDF data.

Inheritance Hierarchy

System.Object
VDS.RDF.Query.Optimisation.VirtualAlgebraOptimiser<TNodeID, TGraphID>
VDS.RDF.Query.Optimisation.SimpleVirtualAlgebraOptimiser

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

Syntax

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public abstract class VirtualAlgebraOptimiser<TNodeID, TGraphID> : IAlgebraOptimiser, 
	IExpressionTransformer

Public MustInherit Class VirtualAlgebraOptimiser(Of TNodeID, TGraphID)
	Implements IAlgebraOptimiser, IExpressionTransformer

Type Parameters

TNodeID: Node ID Type.
TGraphID: Graph ID Type.

The VirtualAlgebraOptimiser<TNodeID, TGraphID> type exposes the following members.

Constructors

	Name	Description
	VirtualAlgebraOptimiser<TNodeID, TGraphID>	Creates a new Virtual Algebra Optimiser.

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Methods

	Name	Description
	CreateVirtualNode	Creates a virtual Node based on a given Value.
	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.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsApplicable(SparqlQuery)	Returns that the optimiser is applicable to all queries.
	IsApplicable(SparqlUpdateCommandSet)	Returns that the optimiser is applicable to all updates.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Optimise	Optimises the algebra so that all Node terms are virtualised.
	SubstitutePrimaryExpression	Substitutes a primary expression which is a Node term for a virtual Node term.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Transform	Transforms an expression so Node terms are virtualised.

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Fields

	Name	Description
	_provider	Virtual RDF Provider.

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Reference

VDS.RDF.Query.Optimisation Namespace

VirtualAlgebraOptimiser<AddLanguageSpecificTextSet("LST7574D1E_0?cs=&lt;|vb=(Of |cpp=&lt;|fs=&lt;'|nu=(");TNodeID, TGraphID>AddLanguageSpecificTextSet("LST7574D1E_1?cs=&gt;|vb=)|cpp=&gt;|fs=&gt;|nu=)"); Class

Type Parameters

Reference

VirtualAlgebraOptimiser<TNodeID, TGraphID> Class