Package org.apache.wayang.core.optimizer.costs

Interface EstimatableCost

All Known Implementing Classes:

DefaultEstimatableCost

public interface EstimatableCost

EstimatableCost defines an interface for optimizer cost in terms of methods to estimate a PlanImplementation's cost.

Method Summary

Modifier and Type	Method	Description
ProbabilisticDoubleInterval	getEstimate(PlanImplementation plan, boolean isOverheadIncluded)
EstimatableCostFactory	getFactory()
ProbabilisticDoubleInterval	getParallelEstimate(PlanImplementation plan, boolean isOverheadIncluded)
Tuple<List<ProbabilisticDoubleInterval>,List<Double>>	getParallelOperatorJunctionAllCostEstimate(PlanImplementation plan, Operator operator)
double	getSquashedEstimate(PlanImplementation plan, boolean isOverheadIncluded)	Returns a squashed cost estimate.
double	getSquashedParallelEstimate(PlanImplementation plan, boolean isOverheadIncluded)
PlanImplementation	pickBestExecutionPlan(Collection<PlanImplementation> executionPlans, ExecutionPlan existingPlan, Set<Channel> openChannels, Set<ExecutionStage> executedStages)

Method Details

getFactory

EstimatableCostFactory getFactory()

pickBestExecutionPlan

PlanImplementation pickBestExecutionPlan(Collection<PlanImplementation> executionPlans,
 ExecutionPlan existingPlan,
 Set<Channel> openChannels,
 Set<ExecutionStage> executedStages)

getEstimate

ProbabilisticDoubleInterval getEstimate(PlanImplementation plan,
 boolean isOverheadIncluded)

getParallelEstimate

ProbabilisticDoubleInterval getParallelEstimate(PlanImplementation plan,
 boolean isOverheadIncluded)

getSquashedEstimate

double getSquashedEstimate(PlanImplementation plan,
 boolean isOverheadIncluded)

Returns a squashed cost estimate.

getSquashedParallelEstimate

double getSquashedParallelEstimate(PlanImplementation plan,
 boolean isOverheadIncluded)

getParallelOperatorJunctionAllCostEstimate

Tuple<List<ProbabilisticDoubleInterval>,List<Double>> getParallelOperatorJunctionAllCostEstimate(PlanImplementation plan,
 Operator operator)