it.unibz.inf.ontop.iq.executor.join

Class RedundantJoinFKExecutor

java.lang.Object

it.unibz.inf.ontop.iq.executor.join.RedundantJoinFKExecutor

All Implemented Interfaces:

InnerJoinExecutor, NodeCentricExecutor<InnerJoinNode,NodeCentricOptimizationResults<InnerJoinNode>,InnerJoinOptimizationProposal>, ProposalExecutor<InnerJoinOptimizationProposal,NodeCentricOptimizationResults<InnerJoinNode>>, SimpleNodeCentricExecutor<InnerJoinNode,InnerJoinOptimizationProposal>

public class RedundantJoinFKExecutor
extends Object
implements InnerJoinExecutor

Use foreign keys to remove some redundant inner joins Normalization assumption: variables are reused between data nodes (no explicit equality between variables)

Method Summary

Modifier and Type	Method and Description
NodeCentricOptimizationResults<InnerJoinNode>	apply(InnerJoinOptimizationProposal proposal, IntermediateQuery query, QueryTreeComponent treeComponent)

Methods inherited from class java.lang.Object

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

Method Detail

apply

public NodeCentricOptimizationResults<InnerJoinNode> apply(InnerJoinOptimizationProposal proposal,
                                                           IntermediateQuery query,
                                                           QueryTreeComponent treeComponent)
                                                    throws InvalidQueryOptimizationProposalException

Specified by:

apply in interface ProposalExecutor<InnerJoinOptimizationProposal,NodeCentricOptimizationResults<InnerJoinNode>>

Throws:

InvalidQueryOptimizationProposalException