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

Class DistinctCombiner

java.lang.Object

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

public class DistinctCombiner
extends java.lang.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 to minimize the data being sent to the reduce.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DistinctCombiner.Combine

Constructor Summary

Constructors

Constructor and Description
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()