org.eclipse.rdf4j.sail.federation.optimizers

Class FederationJoinOptimizer

java.lang.Object

org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor<RepositoryException>

org.eclipse.rdf4j.sail.federation.optimizers.FederationJoinOptimizer

All Implemented Interfaces:

QueryOptimizer, QueryModelVisitor<RepositoryException>

public class FederationJoinOptimizer
extends AbstractQueryModelVisitor<RepositoryException>
implements QueryOptimizer

Search for Join, LeftJoin, and Union arguments that can be evaluated in a single member.

Author:

James Leigh

Constructor Summary

Constructors

Constructor and Description
FederationJoinOptimizer(Collection<? extends RepositoryConnection> members, boolean distinct, PrefixHashSet localSpace)
FederationJoinOptimizer(Collection<? extends RepositoryConnection> members, boolean distinct, PrefixHashSet localSpace, java.util.function.Function<? super Repository,? extends RepositoryBloomFilter> bloomFilters)

Method Summary

Modifier and Type	Method and Description
void	meet(LeftJoin node)
void	meet(Union node)
void	meetMultiJoin(NaryJoin node)
void	meetOther(QueryModelNode node)
protected void	meetUnaryTupleOperator(UnaryTupleOperator node) Method called by all meet methods with a UnaryTupleOperator node as argument.
void	optimize(TupleExpr query, Dataset dataset, BindingSet bindings)

Methods inherited from class org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryTupleOperator, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetNAryValueOperator, meetNode, meetSubQueryValueOperator, meetUnaryValueOperator, meetUpdateExpr

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FederationJoinOptimizer

public FederationJoinOptimizer(Collection<? extends RepositoryConnection> members,
                               boolean distinct,
                               PrefixHashSet localSpace)

FederationJoinOptimizer

public FederationJoinOptimizer(Collection<? extends RepositoryConnection> members,
                               boolean distinct,
                               PrefixHashSet localSpace,
                               java.util.function.Function<? super Repository,? extends RepositoryBloomFilter> bloomFilters)

Method Detail

optimize

public void optimize(TupleExpr query,
                     Dataset dataset,
                     BindingSet bindings)

Specified by:

optimize in interface QueryOptimizer

meetOther

public void meetOther(QueryModelNode node)
               throws RepositoryException

Specified by:

meetOther in interface QueryModelVisitor<RepositoryException>

Overrides:

meetOther in class AbstractQueryModelVisitor<RepositoryException>

Throws:

RepositoryException

meetMultiJoin

public void meetMultiJoin(NaryJoin node)
                   throws RepositoryException

Throws:

RepositoryException

meet

public void meet(LeftJoin node)
          throws RepositoryException

Specified by:

meet in interface QueryModelVisitor<RepositoryException>

Overrides:

meet in class AbstractQueryModelVisitor<RepositoryException>

Throws:

RepositoryException

meet

public void meet(Union node)
          throws RepositoryException

Specified by:

meet in interface QueryModelVisitor<RepositoryException>

Overrides:

meet in class AbstractQueryModelVisitor<RepositoryException>

Throws:

RepositoryException

meetUnaryTupleOperator

protected void meetUnaryTupleOperator(UnaryTupleOperator node)
                               throws RepositoryException

Description copied from class: AbstractQueryModelVisitor

Method called by all meet methods with a UnaryTupleOperator node as argument. Forwards the call to AbstractQueryModelVisitor.meetNode(org.eclipse.rdf4j.query.algebra.QueryModelNode) by default.

Overrides:

meetUnaryTupleOperator in class AbstractQueryModelVisitor<RepositoryException>

Parameters:

node - The node that is being visited.

Throws:

RepositoryException