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

AccumulatorOptimizer(MROperPlan plan)

Method Summary

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