org.apache.pig.backend.hadoop.executionengine.mapReduceLayer

Class SecondaryKeyOptimizer

java.lang.Object

org.apache.pig.impl.plan.PlanVisitor<MapReduceOper,MROperPlan>

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.plans.MROpPlanVisitor

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.SecondaryKeyOptimizer

public class SecondaryKeyOptimizer
extends MROpPlanVisitor

Field Summary

Fields inherited from class org.apache.pig.impl.plan.PlanVisitor

mCurrentWalker, mPlan

Constructor Summary

Constructors

Constructor and Description
SecondaryKeyOptimizer(MROperPlan plan)

Method Summary

Methods

Modifier and Type	Method and Description
int	getDistinctChanged()
int	getNumMRUseSecondaryKey()
int	getNumSortRemoved()
void	visitMROp(MapReduceOper mr)

Methods inherited from class org.apache.pig.impl.plan.PlanVisitor

getPlan, popWalker, pushWalker, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

SecondaryKeyOptimizer

public SecondaryKeyOptimizer(MROperPlan plan)

Parameters:

plan - The MROperPlan to visit to discover keyType

Method Detail

visitMROp

public void visitMROp(MapReduceOper mr)
               throws VisitorException

Overrides:

visitMROp in class MROpPlanVisitor

Throws:

VisitorException

getNumMRUseSecondaryKey

public int getNumMRUseSecondaryKey()

getNumSortRemoved

public int getNumSortRemoved()

getDistinctChanged

public int getDistinctChanged()