com.facebook.presto.cost

Interface CostCalculator

All Known Implementing Classes:

CostCalculatorUsingExchanges, CostCalculatorWithEstimatedExchanges

@ThreadSafe
public interface CostCalculator

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	CostCalculator.EstimatedExchanges

Method Summary

Modifier and Type	Method and Description
PlanCostEstimate	calculateCost(PlanNode node, StatsProvider stats, CostProvider sourcesCosts, Session session) Calculates cumulative cost of a node.

Method Detail

calculateCost

PlanCostEstimate calculateCost(PlanNode node,
                               StatsProvider stats,
                               CostProvider sourcesCosts,
                               Session session)

Calculates cumulative cost of a node.

Parameters:

node - The node to compute cost for.

stats - The stats provider for node's stats and child nodes' stats, to be used if stats are needed to compute cost for the node