Class Distinct

Represents a Distinct modifier on a SPARQL Query.
Inheritance
System.Object
Distinct
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: VDS.RDF.Query.Algebra
Assembly: dotNetRDF.dll
Syntax
public class Distinct : IUnaryOperator, ISparqlAlgebra

Constructors

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Distinct(ISparqlAlgebra)

Creates a new Distinct Modifier.
Declaration
public Distinct(ISparqlAlgebra pattern)
Parameters
Type Name Description
ISparqlAlgebra pattern Pattern.
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Distinct(ISparqlAlgebra, Boolean)

Creates a new Distinct Modifier.
Declaration
public Distinct(ISparqlAlgebra algebra, bool ignoreTemporaryVariables)
Parameters
Type Name Description
ISparqlAlgebra algebra Inner Algebra.
System.Boolean ignoreTemporaryVariables Whether to ignore temporary variables.

Properties

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FixedVariables

Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.
Declaration
public IEnumerable<string> FixedVariables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<System.String>
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FloatingVariables

Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.
Declaration
public IEnumerable<string> FloatingVariables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<System.String>
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InnerAlgebra

Gets the Inner Algebra.
Declaration
public ISparqlAlgebra InnerAlgebra { get; }
Property Value
Type Description
ISparqlAlgebra
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Variables

Gets the Variables used in the Algebra.
Declaration
public IEnumerable<string> Variables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<System.String>

Methods

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Evaluate(SparqlEvaluationContext)

Evaluates the Distinct Modifier.
Declaration
public BaseMultiset Evaluate(SparqlEvaluationContext context)
Parameters
Type Name Description
SparqlEvaluationContext context Evaluation Context.
Returns
Type Description
BaseMultiset
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ToGraphPattern()

Throws an exception since a Distinct() cannot be converted back to a Graph Pattern.
Declaration
public GraphPattern ToGraphPattern()
Returns
Type Description
GraphPattern
Exceptions
Type Condition
System.NotSupportedException Thrown since a Distinct() cannot be converted to a Graph Pattern.
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ToQuery()

Converts the Algebra back to a SPARQL Query.
Declaration
public SparqlQuery ToQuery()
Returns
Type Description
SparqlQuery
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ToString()

Gets the String representation of the Algebra.
Declaration
public override string ToString()
Returns
Type Description
System.String
Overrides
System.Object.ToString()
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Transform(IAlgebraOptimiser)

Transforms the Inner Algebra using the given Optimiser.
Declaration
public ISparqlAlgebra Transform(IAlgebraOptimiser optimiser)
Parameters
Type Name Description
IAlgebraOptimiser optimiser Optimiser.
Returns
Type Description
ISparqlAlgebra

Implements

Extension Methods