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
Inherited Members
Namespace: VDS.RDF.Query.Optimisation
Assembly: dotNetRdf.dll
Syntax
public class StrictAlgebraOptimiser : IAlgebraOptimiser

Properties

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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

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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
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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
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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

Extension Methods