Package org.apache.drill.exec.planner.cost

Class PrelCostEstimates

java.lang.Object

org.apache.drill.exec.planner.cost.PrelCostEstimates

public class PrelCostEstimates
extends Object

Cost estimates per physical relation. These cost estimations are computed during physical planning by the optimizer. These are also used post physical planning to compute memory requirements in minor fragment generation phase.

Field Summary

Fields

Modifier and Type	Field	Description
static PrelCostEstimates	ZERO_COST

Constructor Summary

Constructors

Constructor	Description
PrelCostEstimates(double memory, double rowCount)

Method Summary

Modifier and Type	Method	Description
double	getMemoryCost()
double	getOutputRowCount()

Methods inherited from class java.lang.Object

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

Field Details

ZERO_COST

public static PrelCostEstimates ZERO_COST

Constructor Details

PrelCostEstimates

public PrelCostEstimates(double memory,
 double rowCount)

Method Details

getOutputRowCount

public double getOutputRowCount()

getMemoryCost

public double getMemoryCost()