Class CostEstimationUtils

java.lang.Object

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

public class CostEstimationUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
CostEstimationUtils()

Method Summary

Modifier and Type	Method	Description
static Double[]	getEstimates(CostModel costModel, QueryProcContext ctx, List<PhysicalPlan> plans)	Initiates the cost estimation processes for all the plans in the given list and, afterwards, waits for the resulting estimates and returns them.
static Double[]	getEstimates(CostModel costModel, QueryProcContext ctx, PhysicalPlan... plans)	Initiates the cost estimation processes for all the given plans and, afterwards, waits for the resulting estimates and returns them.

Methods inherited from class java.lang.Object

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

Constructor Details

CostEstimationUtils

public CostEstimationUtils()

Method Details

getEstimates

public static Double[] getEstimates(CostModel costModel,
 QueryProcContext ctx,
 PhysicalPlan... plans)
                             throws CostEstimationException

Initiates the cost estimation processes for all the given plans and, afterwards, waits for the resulting estimates and returns them. The returned array contains as many values as plans are given to this function, where the i-th value is for the i-th plan that is given.

Throws:

CostEstimationException

getEstimates

public static Double[] getEstimates(CostModel costModel,
 QueryProcContext ctx,
 List<PhysicalPlan> plans)
                             throws CostEstimationException

Initiates the cost estimation processes for all the plans in the given list and, afterwards, waits for the resulting estimates and returns them. The returned array contains as many values as there are plans in the given list, where the i-th value in the array is for the i-th plan in the given list.

Throws:

CostEstimationException