Class BaseAlgebraOptimiser

Abstract Base Class for Algebra Transformers where the Transformer may care about the depth of the Algebra in the Algebra Tree.

Inheritance

object

BaseAlgebraOptimiser

AskBgpOptimiser

LazyBgpOptimiser

Implements

IAlgebraOptimiser

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: VDS.RDF.Query.Optimisation

Assembly: dotNetRdf.dll

Syntax

public abstract class BaseAlgebraOptimiser : IAlgebraOptimiser

Properties

UnsafeOptimisation

Determines whether an Optimiser will perform algebra optimizations that are potentially unsafe at execution time.

Declaration

public bool UnsafeOptimisation { get; set; }

Property Value

Type	Description
bool

Methods

IsApplicable(SparqlQuery)

Determines whether the Optimiser can be applied to a given Query.

Declaration

public abstract bool IsApplicable(SparqlQuery q)

Parameters

Type	Name	Description
SparqlQuery	q	Query.

Returns

Type	Description
bool

IsApplicable(SparqlUpdateCommandSet)

Determines whether the Optimiser can be applied to a given Update Command Set.

Declaration

public abstract bool IsApplicable(SparqlUpdateCommandSet cmds)

Parameters

Type	Name	Description
SparqlUpdateCommandSet	cmds	Command Set.

Returns

Type	Description
bool

Optimise(ISparqlAlgebra)

Attempts to optimise an Algebra to another more optimal form.

Declaration

public virtual ISparqlAlgebra Optimise(ISparqlAlgebra algebra)

Parameters

Type	Name	Description
ISparqlAlgebra	algebra	Algebra.

Returns

Type	Description
ISparqlAlgebra

OptimiseInternal(ISparqlAlgebra, int)

Transforms the Algebra to another form tracking the depth in the Algebra tree.

Declaration

protected abstract ISparqlAlgebra OptimiseInternal(ISparqlAlgebra algebra, int depth)

Parameters

Type	Name	Description
ISparqlAlgebra	algebra	Algebra.
int	depth	Depth.

Returns

Type	Description
ISparqlAlgebra

Implements

IAlgebraOptimiser

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)