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

Class RuleMergeChildUnionIntoMultiwayUnion

java.lang.Object

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

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

All Implemented Interfaces:

RewritingRule

public class RuleMergeChildUnionIntoMultiwayUnion
extends AbstractRewritingRuleImpl

Field Summary

Fields inherited from class se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.rewriting.rules.AbstractRewritingRuleImpl

priority

Constructor Summary

Constructors

Constructor	Description
RuleMergeChildUnionIntoMultiwayUnion(double priority)

Method Summary

Modifier and Type	Method	Description
protected boolean	canBeAppliedTo(PhysicalPlan plan)
protected RuleApplication	createRuleApplication(PhysicalPlan[] pathToTargetPlan)

Methods inherited from class se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.rewriting.rules.AbstractRewritingRuleImpl

collectAllPossibleApplications, determineAllPossibleApplications, getPriority

Methods inherited from class java.lang.Object

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

Constructor Details

RuleMergeChildUnionIntoMultiwayUnion

public RuleMergeChildUnionIntoMultiwayUnion(double priority)

Method Details

canBeAppliedTo

protected boolean canBeAppliedTo(PhysicalPlan plan)

Specified by:

canBeAppliedTo in class AbstractRewritingRuleImpl

createRuleApplication

protected RuleApplication createRuleApplication(PhysicalPlan[] pathToTargetPlan)

Specified by:

createRuleApplication in class AbstractRewritingRuleImpl