Package org.eclipse.rdf4j.federated.algebra

package org.eclipse.rdf4j.federated.algebra

Interface Summary

Interface	Description
BoundJoinTupleExpr	Marker interface indicating that instances are applicable for bound join processing (see ControlledWorkerBoundJoin
EmptyResult	A generic interface to mark some TupleExpr as empty.
ExclusiveTupleExpr	Interface representing nodes that can exclusively be evaluated at a single StatementSource.
ExclusiveTupleExprRenderer	A specialization of ExclusiveTupleExpr which provides definitions how the expressions can be rendered to a sub-query.
FedXTupleExpr	Interface marking known FedX algebra nodes.
FilterTuple	Expressions implementing this interface can apply some FilterValueExpr during evaluation.
FilterValueExpr	Interface to indicate filter expressions.
QueryRef	Interface to access the QueryInfo from all FedX Algebra nodes.
StatementTupleExpr	Interface for any expression that can be evaluated
VariableExpr	Interface for algebra nodes that can return the free variables of the expression.

Class Summary

Class	Description
BoundFiltersNode	A QueryModelNode for printing the bound filter vars (e.g.
CheckStatementPattern	A statement pattern with no free variables when provided with some particular BindingSet in evaluate.
ConjunctiveFilterExpr	ConjunctiveFilterExpr maintains a list of conjunctive (i.e.
EmptyNJoin	Algebra construct representing an empty join.
EmptyNUnion	Algebra construct representing an empty union.
EmptyStatementPattern	EmptyStatementPattern represents a statement that cannot produce any results for the registered endpoints.
ExclusiveArbitraryLengthPath	An ArbitraryLengthPath node which can be evaluated at a single node.
ExclusiveGroup	Represents a group of ExclusiveTupleExpr that can only produce results at a single endpoint, the StatementSource.
ExclusiveStatement	Represents a StatementPattern that can only produce results at a single endpoint, the owner.
FederatedDescribeOperator	Specialized DescribeOperator Node for maintaining QueryInfo.
FedXLeftJoin	Abstraction of LeftJoin to maintain the QueryInfo.
FedXService
FedXStatementPattern	Base class providing all common functionality for FedX StatementPatterns
FilterExpr	FilterExpr maintains information for a particular FILTER expression.
NJoin	A tuple expression that represents an nary-Join.
NodeFactory	A factory that produces globally unique IDS which are used as node identifiers, e.g.
NTuple	Base class for any nary-tuple expression
NUnion	A tuple expression that represents an nary-Union.
PassThroughTupleExpr	Marker TupleExpr that is used from FedXTupleQuery.evaluate(TupleQueryResultHandler) to allow for passing through of results to the handler.
PrecompiledQueryNode	Node representing a precompiled query.
SingleSourceQuery	A query which has a single relevant source.
StatementSource	A structure representing a relevant source for some expression.
StatementSourcePattern	Represents statements that can produce results at a some particular endpoints, the statement sources.
TrueStatementPattern	A TrueStatementPattern represents a stmt with no free variables which in addition is available at one of the provided sources.

Enum Summary

Enum	Description
StatementSource.StatementSourceType