Package se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple

Class CostModelBasedGreedyJoinPlanOptimizerImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple.JoinPlanOptimizerBase

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple.CostModelBasedGreedyJoinPlanOptimizerImpl

All Implemented Interfaces:

JoinPlanOptimizer

public class CostModelBasedGreedyJoinPlanOptimizerImpl
extends JoinPlanOptimizerBase

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	CostModelBasedGreedyJoinPlanOptimizerImpl.GreedyEnumerationAlgorithm

Nested classes/interfaces inherited from class se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple.JoinPlanOptimizerBase

JoinPlanOptimizerBase.EnumerationAlgorithm

Field Summary

Fields

Modifier and Type	Field	Description
protected final CostModel	costModel

Constructor Summary

Constructors

Constructor	Description
CostModelBasedGreedyJoinPlanOptimizerImpl(CostModel costModel)

Method Summary

Modifier and Type	Method	Description
protected List<PhysicalPlan>	createAllJoinPlans(PhysicalPlan leftOrChild, PhysicalPlan rightOrTop)	Creates a list of join plans, including a (default) binary join of the given two plans as well as possible plans with unary (gpAdd-based) joins in which the first given plan is the child.
JoinPlanOptimizerBase.EnumerationAlgorithm	initializeEnumerationAlgorithm(List<PhysicalPlan> subplans)

Methods inherited from class se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple.JoinPlanOptimizerBase

determineJoinPlan

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.simple.JoinPlanOptimizer

determineJoinPlan

Field Details

costModel

protected final CostModel costModel

Constructor Details

CostModelBasedGreedyJoinPlanOptimizerImpl

public CostModelBasedGreedyJoinPlanOptimizerImpl(CostModel costModel)

Method Details

initializeEnumerationAlgorithm

public JoinPlanOptimizerBase.EnumerationAlgorithm initializeEnumerationAlgorithm(List<PhysicalPlan> subplans)

Specified by:

initializeEnumerationAlgorithm in class JoinPlanOptimizerBase

createAllJoinPlans

protected List<PhysicalPlan> createAllJoinPlans(PhysicalPlan leftOrChild,
 PhysicalPlan rightOrTop)

Creates a list of join plans, including a (default) binary join of the given two plans as well as possible plans with unary (gpAdd-based) joins in which the first given plan is the child.