org.apache.lens.server.api.query.cost

Interface QueryCostCalculator

All Known Implementing Classes:

FactPartitionBasedQueryCostCalculator

public interface QueryCostCalculator

Method Summary

Modifier and Type	Method and Description
QueryCost	calculateCost(AbstractQueryContext queryContext, LensDriver driver)

Method Detail

calculateCost

QueryCost calculateCost(AbstractQueryContext queryContext,
                        LensDriver driver)
                 throws LensException

Parameters:

queryContext -

Returns:

calculated cost based on anything available in abstract query context

Throws:

LensException - when can't calculate cost