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

Class PhysicalOptimizerWithoutOptimization

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.PhysicalOptimizerBase

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.PhysicalOptimizerWithoutOptimization

All Implemented Interfaces:

PhysicalOptimizer

public class PhysicalOptimizerWithoutOptimization
extends PhysicalOptimizerBase

Field Summary

Fields inherited from class se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.PhysicalOptimizerBase

l2pConverter

Constructor Summary

Constructors

Constructor	Description
PhysicalOptimizerWithoutOptimization(LogicalToPhysicalPlanConverter l2pConverter)

Method Summary

Modifier and Type	Method	Description
boolean	assumesLogicalMultiwayJoins()
boolean	keepMultiwayJoinsInInitialPhysicalPlan()	Return true if this optimizer expects that multiway joins are carried over from the given logical plan into the initial physical plan.
Pair<PhysicalPlan,PhysicalOptimizationStats>	optimize(PhysicalPlan initialPlan)

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

optimize

Methods inherited from class java.lang.Object

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

Constructor Details

PhysicalOptimizerWithoutOptimization

public PhysicalOptimizerWithoutOptimization(LogicalToPhysicalPlanConverter l2pConverter)

Method Details

assumesLogicalMultiwayJoins

public boolean assumesLogicalMultiwayJoins()

keepMultiwayJoinsInInitialPhysicalPlan

public boolean keepMultiwayJoinsInInitialPhysicalPlan()

Description copied from class: PhysicalOptimizerBase

Return true if this optimizer expects that multiway joins are carried over from the given logical plan into the initial physical plan. The PhysicalOptimizerBase.optimize(LogicalPlan) function passes this flag as the second argument of the LogicalToPhysicalPlanConverter.convert(LogicalPlan, boolean) function.

Specified by:

keepMultiwayJoinsInInitialPhysicalPlan in class PhysicalOptimizerBase

optimize

public Pair<PhysicalPlan,PhysicalOptimizationStats> optimize(PhysicalPlan initialPlan)
                                                      throws PhysicalOptimizationException

Specified by:

optimize in class PhysicalOptimizerBase

Throws:

PhysicalOptimizationException