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

Constructor Summary

Constructors

Constructor	Description
PhysicalOptimizerWithoutOptimization()

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, QueryProcContext ctxt)

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()

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

invalid reference

#optimize(LogicalPlan)

function passes this flag as the second argument of the

invalid reference

LogicalToPhysicalPlanConverter#convert(LogicalPlan, boolean)

function.

Specified by:

keepMultiwayJoinsInInitialPhysicalPlan in class PhysicalOptimizerBase

optimize

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

Specified by:

optimize in class PhysicalOptimizerBase

Throws:

PhysicalOptimizationException