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

Class AccumulatorOptimizer

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.AccumulatorOptimizer

public class AccumulatorOptimizer
extends MROpPlanVisitor

A visitor to optimize plans that determines if a reduce plan can run in accumulative mode.

Field Summary

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

mCurrentWalker, mPlan

Constructor Summary

Constructors

Constructor and Description
AccumulatorOptimizer(MROperPlan plan)

Method Summary

Methods

Modifier and Type	Method and Description
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

AccumulatorOptimizer

public AccumulatorOptimizer(MROperPlan plan)

Method Detail

visitMROp

public void visitMROp(MapReduceOper mr)
               throws VisitorException

Overrides:

visitMROp in class MROpPlanVisitor

Throws:

VisitorException