Class AbstractRewritingRuleImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.rewriting.rules.AbstractRewritingRuleImpl

All Implemented Interfaces:

RewritingRule

Direct Known Subclasses:

GenericRuleChangeOrderOfTwoUnaryOp, GenericRuleMergeBGPAddOfReqIntoOneBGPReq, GenericRuleMergeJoinOfTwoReqIntoOneBGPReq, RuleChangeOrderAndMergeJoinOfBGPReqIntoBGPAdd, RuleChangeOrderAndMergeJoinOfTPReqIntoTPAdd, RuleChangeOrderOfThreeSubPlansOfJOIN, RuleChangeOrderOfThreeSubPlansOfUNION, RuleChangeOrderOfTwoSubPlansOfJOIN, RuleChangeOrderOfTwoSubPlansOfUNION, RuleConvertBGPAddToBJFILTER, RuleConvertBGPAddToBJUNION, RuleConvertBGPAddToBJVALUES, RuleConvertBGPAddToHashJoin, RuleConvertBGPAddToIndexNLJ, RuleConvertBGPAddToSymmetricHashJoin, RuleConvertGBPAddToNaiveNLJ, RuleConvertTPAddToBindJoin, RuleConvertTPAddToBJFILTER, RuleConvertTPAddToBJUNION, RuleConvertTPAddToBJVALUES, RuleConvertTPAddToHashJoin, RuleConvertTPAddToIndexNLJ, RuleConvertTPAddToNaiveNLJ, RuleConvertTPAddToSymmetricHashJoin, RuleConvertUnionOfTwoJoinsToJoinOfUnion, RuleDistributeJOINOverUNION, RuleDivideBGPAddToMultiTPAdd, RuleDivideBGPReqIntoJoinOfTPReqs, RuleDivideBGPReqIntoMultiTPAdds, RuleDivideMultiwayJoinToJoinOfSubPlans, RuleDivideMultiwayUnionToUnionOfSubPlans, RuleMergeBGPAddOfGraphPatternReqIntoOneRequest, RuleMergeChildJoinIntoMultiwayJoin, RuleMergeChildUnionIntoMultiwayUnion, RuleMergeJoinOfOneBGPReqIntoBGPAdd, RuleMergeJoinOfOneTPReqIntoTPAdd, RuleMergeJoinOfTwoPatternReqIntoOneReq, RuleMergeMultiwayJoinOfMultiIdenticalSubPlansIntoOne, RuleMergeMultiwayUnionOfMultiIdenticalSubPlansIntoOne, RuleMergeTPAddOfBGPAddIntoBGPAdd, RuleMergeTPAddOfBGPReqIntoOneRequest, RuleMergeTPAddOfGraphPatternReqIntoOneRequest, RuleMergeTwoBGPAddIntoOneBGPAdd, RuleMergeUnionOfTwoIdenticalSubPlansIntoOne, RuleMergeUNIONOfTwoPatternReqIntoOneReq

public abstract class AbstractRewritingRuleImpl
extends Object
implements RewritingRule

Field Summary

Fields

Modifier and Type	Field	Description
protected final double	priority

Constructor Summary

Constructors

Constructor	Description
AbstractRewritingRuleImpl(double priority)

Method Summary

Modifier and Type	Method	Description
protected abstract boolean	canBeAppliedTo(PhysicalPlan plan)
protected void	collectAllPossibleApplications(PhysicalPlan plan, Set<RuleApplication> collectedRuleApps, Stack<PhysicalPlan> currentPathFromRoot)
protected abstract RuleApplication	createRuleApplication(PhysicalPlan[] pathToTargetPlan)
Set<RuleApplication>	determineAllPossibleApplications(PhysicalPlan plan)	Returns all possible applications of this rule for the given plan.
double	getPriority()

Methods inherited from class java.lang.Object

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

Field Details

priority

protected final double priority

Constructor Details

AbstractRewritingRuleImpl

public AbstractRewritingRuleImpl(double priority)

Method Details

getPriority

public double getPriority()

Specified by:

getPriority in interface RewritingRule

determineAllPossibleApplications

public Set<RuleApplication> determineAllPossibleApplications(PhysicalPlan plan)

Description copied from interface: RewritingRule

Returns all possible applications of this rule for the given plan. Each of the returned RuleApplication objects will return the given plan when calling RuleApplication.getPlan() and it will return this rule when calling RuleApplication.getRule().

Specified by:

determineAllPossibleApplications in interface RewritingRule

collectAllPossibleApplications

protected void collectAllPossibleApplications(PhysicalPlan plan,
 Set<RuleApplication> collectedRuleApps,
 Stack<PhysicalPlan> currentPathFromRoot)

canBeAppliedTo

protected abstract boolean canBeAppliedTo(PhysicalPlan plan)

createRuleApplication

protected abstract RuleApplication createRuleApplication(PhysicalPlan[] pathToTargetPlan)