org.eclipse.rdf4j.query.algebra

Interface GraphPatternGroupable

All Known Implementing Classes:

AbstractAggregateOperator, AbstractNaryOperator, AbstractNaryTupleOperator, AbstractQueryModelNode, Add, AggregateOperatorBase, And, ArbitraryLengthPath, Avg, BinaryTupleOperator, BinaryValueOperator, BindingSetAssignment, BNodeGenerator, Bound, BoundFiltersNode, Clear, Coalesce, Compare, CompareAll, CompareAny, CompareSubQueryValueOperator, ConjunctiveFilterExpr, Copy, Count, Create, Datatype, DeleteData, DescribeOperator, Difference, Distinct, EmptyNJoin, EmptyNUnion, EmptySet, EmptyStatementPattern, ExclusiveArbitraryLengthPath, ExclusiveGroup, ExclusiveStatement, Exists, Extension, ExtensionElem, ExternalSet, FedXLeftJoin, FedXService, FedXStatementPattern, Filter, FilterExpr, FunctionCall, Group, GroupConcat, GroupElem, If, In, InsertData, Intersection, IRIFunction, IsBNode, IsLiteral, IsNumeric, IsResource, IsURI, Join, Label, Lang, LangMatches, LeftJoin, Like, ListMemberOperator, Load, LocalName, MathExpr, Max, Min, Modify, Move, MultiProjection, Namespace, NaryJoin, NAryValueOperator, NJoin, Not, NTuple, NUnion, Or, Order, OrderElem, OwnedTupleExpr, PrecompiledQueryNode, Projection, ProjectionElem, ProjectionElemList, QueryModelNodeBase, QueryRoot, Reduced, Regex, SameTerm, Sample, Service, SingleSourceQuery, SingletonSet, Slice, StatementPattern, StatementSource, StatementSourcePattern, Str, SubQueryValueOperator, Sum, TrueStatementPattern, TupleFunctionCall, UnaryTupleOperator, UnaryValueOperator, Union, ValueConstant, Var, ZeroLengthPath

public interface GraphPatternGroupable

QueryModelNodes that can represent a full graph pattern group. Although the notion of a graph pattern group is strictly not relevant at the algebra level, it gives an indication to evaluation strategy implementations on how they can optimize join patterns wrt variable scope.

Author:

Jeen Broekstra

Method Summary

Modifier and Type	Method and Description
boolean	isGraphPatternGroup() indicates if the node represents the root of a graph pattern group.
void	setGraphPatternGroup(boolean isGraphPatternGroup) Set the value of isGraphPatternGroup() to true or false.

Method Detail

isGraphPatternGroup

boolean isGraphPatternGroup()

indicates if the node represents the root of a graph pattern group.

Returns:

true iff the node represents the node of a graph pattern group.

setGraphPatternGroup

void setGraphPatternGroup(boolean isGraphPatternGroup)

Set the value of isGraphPatternGroup() to true or false.