Class StrictAlgebraOptimiser

The Strict Algebra Optimiser is an optimiser that takes our BGPs which typically contain placed FILTERs and BINDs and transforms them into their strict algebra form using Filter() and Extend().

Inheritance

object

StrictAlgebraOptimiser

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 class StrictAlgebraOptimiser : 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)

Returns that the optimiser is applicable to all queries.

Declaration

public bool IsApplicable(SparqlQuery q)

Parameters

Type	Name	Description
SparqlQuery	q	Query.

Returns

Type	Description
bool

IsApplicable(SparqlUpdateCommandSet)

Returns that the optimiser is applicable to all updates.

Declaration

public bool IsApplicable(SparqlUpdateCommandSet cmds)

Parameters

Type	Name	Description
SparqlUpdateCommandSet	cmds	Updates.

Returns

Type	Description
bool

Optimise(ISparqlAlgebra)

Optimises BGPs in the Algebra to use Filter() and Extend() rather than the embedded FILTER and BIND.

Declaration

public ISparqlAlgebra Optimise(ISparqlAlgebra algebra)

Parameters

Type	Name	Description
ISparqlAlgebra	algebra	Algebra to optimise.

Returns

Type	Description
ISparqlAlgebra

Implements

IAlgebraOptimiser

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)