Class OrderBy

Represents an Order By clause.

Inheritance
System.Object
OrderBy
Implements
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
Namespace: VDS.RDF.Query.Algebra
Assembly: dotNetRdf.dll
Syntax
public class OrderBy : IUnaryOperator, ISparqlAlgebra, IVisitable, IProcessable

Constructors

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OrderBy(ISparqlAlgebra, ISparqlOrderBy)

Creates a new Order By clause.

Declaration
public OrderBy(ISparqlAlgebra pattern, ISparqlOrderBy ordering)
Parameters
Type Name Description
ISparqlAlgebra pattern

Pattern.
ISparqlOrderBy ordering

Ordering.

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<T><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<T><string>
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InnerAlgebra

Gets the Inner Algebra.

Declaration
public ISparqlAlgebra InnerAlgebra { get; }
Property Value
Type Description
ISparqlAlgebra
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Ordering

Gets the Ordering that is used.

Declaration
public ISparqlOrderBy Ordering { get; }
Property Value
Type Description
ISparqlOrderBy
Remarks

If the Query supplied in the SparqlEvaluationContext is non-null and has an ORDER BY clause then that is applied rather than the ordering with which the OrderBy algebra is instantiated.

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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<T><string>

Methods

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Accept<T>(ISparqlAlgebraVisitor<T>)

Declaration
public T Accept<T>(ISparqlAlgebraVisitor<T> visitor)
Parameters
Type Name Description
ISparqlAlgebraVisitor<T> visitor
Returns
Type Description
T
Type Parameters
Name Description
T
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Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

Declaration
public TResult Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext> processor, TContext context)
Parameters
Type Name Description
ISparqlQueryAlgebraProcessor<TResult, TContext> processor
TContext context
Returns
Type Description
TResult
Type Parameters
Name Description
TResult
TContext
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ToGraphPattern()

Throws an error since an OrderBy() cannot be converted back to a Graph Pattern.

Declaration
public GraphPattern ToGraphPattern()
Returns
Type Description
GraphPattern
Exceptions
Type Condition
System.NotSupportedException

Thrown since an OrderBy() cannot be converted back 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
string
Overrides
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