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

Class PhysicalPlanWithCostUtils

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.poptimizer.utils.PhysicalPlanWithCostUtils

public class PhysicalPlanWithCostUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
PhysicalPlanWithCostUtils()

Method Summary

Modifier and Type	Method	Description
static List<PhysicalPlanWithCost>	annotatePlansWithCost(CostModel cost, List<PhysicalPlan> plans)
static PhysicalPlanWithCost	annotatePlanWithCost(CostModel cm, PhysicalPlan plan)
static double	calculateAvgCostOfPlans(List<PhysicalPlanWithCost> plansWithCost)
static double	calculateStDevCostOfPlans(List<PhysicalPlanWithCost> plansWithCost)
static double	calculateStDevCostOfPlans(List<PhysicalPlanWithCost> plansWithCost, double avgCost)
static int	countNrOfPlansWithBestCost(List<PhysicalPlanWithCost> plansWithCost, double bestCost)
static PhysicalPlanWithCost	findPlanWithHighestCost(List<PhysicalPlanWithCost> plansWithCost)
static PhysicalPlanWithCost	findPlanWithLowestCost(List<PhysicalPlanWithCost> plansWithCost)
static PhysicalPlanWithCost	findTopKPlanWithLowestCost(List<PhysicalPlanWithCost> plansWithCost, double p)
static <T> List<List<T>>	slicePlans(List<T> plans, int batchSize)

Methods inherited from class java.lang.Object

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

Constructor Details

PhysicalPlanWithCostUtils

public PhysicalPlanWithCostUtils()

Method Details

annotatePlanWithCost

public static PhysicalPlanWithCost annotatePlanWithCost(CostModel cm,
 PhysicalPlan plan)
                                                 throws PhysicalOptimizationException

Throws:

PhysicalOptimizationException

annotatePlansWithCost

public static List<PhysicalPlanWithCost> annotatePlansWithCost(CostModel cost,
 List<PhysicalPlan> plans)
                                                        throws PhysicalOptimizationException

Throws:

PhysicalOptimizationException

slicePlans

public static <T> List<List<T>> slicePlans(List<T> plans,
 int batchSize)

findPlanWithLowestCost

public static PhysicalPlanWithCost findPlanWithLowestCost(List<PhysicalPlanWithCost> plansWithCost)

findPlanWithHighestCost

public static PhysicalPlanWithCost findPlanWithHighestCost(List<PhysicalPlanWithCost> plansWithCost)

findTopKPlanWithLowestCost

public static PhysicalPlanWithCost findTopKPlanWithLowestCost(List<PhysicalPlanWithCost> plansWithCost,
 double p)

calculateAvgCostOfPlans

public static double calculateAvgCostOfPlans(List<PhysicalPlanWithCost> plansWithCost)

calculateStDevCostOfPlans

public static double calculateStDevCostOfPlans(List<PhysicalPlanWithCost> plansWithCost)

calculateStDevCostOfPlans

public static double calculateStDevCostOfPlans(List<PhysicalPlanWithCost> plansWithCost,
 double avgCost)

countNrOfPlansWithBestCost

public static int countNrOfPlansWithBestCost(List<PhysicalPlanWithCost> plansWithCost,
 double bestCost)