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

java.lang.Object
  org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.DistinctCombiner

public class DistinctCombiner
extends Object

A special implementation of combiner used only for distinct. This combiner does not even parse out the records. It just throws away duplicate values in the key in order ot minimize the data being sent to the reduce.

Nested Class Summary

static class

DistinctCombiner.Combine

Constructor Summary

DistinctCombiner()

Method Summary

Methods inherited from class java.lang.Object

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

Constructor Detail

DistinctCombiner

public DistinctCombiner()