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

Class SecondaryKeyOptimizerMR

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.SecondaryKeyOptimizerMR

All Implemented Interfaces:

SecondaryKeyOptimizer

@InterfaceAudience.Private
public class SecondaryKeyOptimizerMR
extends MROpPlanVisitor
implements SecondaryKeyOptimizer

Field Summary

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

mCurrentWalker, mPlan

Constructor Summary

Constructors

Constructor and Description
SecondaryKeyOptimizerMR(MROperPlan plan)

Method Summary

Methods

Modifier and Type	Method and Description
int	getNumDistinctChanged()
int	getNumSortRemoved()
int	getNumUseSecondaryKey()
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

SecondaryKeyOptimizerMR

public SecondaryKeyOptimizerMR(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

getNumSortRemoved

public int getNumSortRemoved()

Specified by:

getNumSortRemoved in interface SecondaryKeyOptimizer

getNumDistinctChanged

public int getNumDistinctChanged()

Specified by:

getNumDistinctChanged in interface SecondaryKeyOptimizer

getNumUseSecondaryKey

public int getNumUseSecondaryKey()

Specified by:

getNumUseSecondaryKey in interface SecondaryKeyOptimizer