it.unibz.inf.ontop.iq.executor.leftjoin

Class LeftToInnerJoinExecutor

java.lang.Object

it.unibz.inf.ontop.iq.executor.leftjoin.LeftToInnerJoinExecutor

All Implemented Interfaces:

NodeCentricExecutor<LeftJoinNode,NodeCentricOptimizationResults<LeftJoinNode>,LeftJoinOptimizationProposal>, ProposalExecutor<LeftJoinOptimizationProposal,NodeCentricOptimizationResults<LeftJoinNode>>, SimpleNodeCentricExecutor<LeftJoinNode,LeftJoinOptimizationProposal>

public class LeftToInnerJoinExecutor
extends Object
implements SimpleNodeCentricExecutor<LeftJoinNode,LeftJoinOptimizationProposal>

Tries to transform the left join into a inner join node TODO: describe them TODO: explicit the assumptions

Method Summary

Modifier and Type	Method and Description
NodeCentricOptimizationResults<LeftJoinNode>	apply(LeftJoinOptimizationProposal 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<LeftJoinNode> apply(LeftJoinOptimizationProposal proposal,
                                                          IntermediateQuery query,
                                                          QueryTreeComponent treeComponent)
                                                   throws InvalidQueryOptimizationProposalException

Specified by:

apply in interface ProposalExecutor<LeftJoinOptimizationProposal,NodeCentricOptimizationResults<LeftJoinNode>>

Throws:

InvalidQueryOptimizationProposalException