Package io.trino.cost

Interface CostCalculator

All Known Implementing Classes:

CostCalculatorUsingExchanges, CostCalculatorWithEstimatedExchanges

@ThreadSafe
public interface CostCalculator

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static @interface	CostCalculator.EstimatedExchanges

Method Summary

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

Method Details

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