ExistsJoin Class

Represents a LeftJoin predicated on the existence/non-existence of joinable sets on the RHS for each item on the LHS.

Inheritance Hierarchy

SystemObject
VDS.RDF.Query.AlgebraExistsJoin

Namespace: VDS.RDF.Query.Algebra
Assembly: dotNetRDF (in dotNetRDF.dll) Version:

Syntax

public class ExistsJoin : IExistsJoin, IAbstractJoin, 
	ISparqlAlgebra

Public Class ExistsJoin
	Implements IExistsJoin, IAbstractJoin, ISparqlAlgebra

The ExistsJoin type exposes the following members.

Constructors

	Name	Description
	ExistsJoin	Creates a new Exists Join.

Properties

	Name	Description
	FixedVariables	Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.
	FloatingVariables	Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.
	Lhs	Gets the LHS of the Join.
	MustExist	Gets whether this is an EXISTS join.
	Rhs	Gets the RHS of the Join.
	Variables	Gets the Variables used in the Algebra.

Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Evaluate	Evaluates an ExistsJoin.
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToGraphPattern	Converts the Algebra back to a Graph Pattern.
	ToQuery	Converts the Algebra back to a SPARQL Query.
	ToString	Gets the String representation of the Algebra. (Overrides ObjectToString.)
	Transform	Transforms both sides of the Join using the given Optimiser.
	TransformLhs	Transforms the LHS of the Join using the given Optimiser.
	TransformRhs	Transforms the RHS of the Join using the given Optimiser.