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

Class DistinctCombiner.Combine

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

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

Enclosing class:

DistinctCombiner

public static class DistinctCombiner.Combine
extends org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor and Description
Combine()

Method Summary

Modifier and Type	Method and Description
protected void	reduce(PigNullableWritable key, Iterable<NullableTuple> tupIter, org.apache.hadoop.mapreduce.Reducer.Context context) The reduce function which removes values.
protected void	setup(org.apache.hadoop.mapreduce.Reducer.Context context)
static void	staticDataCleanup()

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run

Methods inherited from class java.lang.Object

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

Constructor Detail

Combine

public Combine()

Method Detail

staticDataCleanup

public static void staticDataCleanup()

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
              throws IOException,
                     InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Throws:

IOException

InterruptedException

reduce

protected void reduce(PigNullableWritable key,
                      Iterable<NullableTuple> tupIter,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

The reduce function which removes values.

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<PigNullableWritable,NullableTuple,PigNullableWritable,org.apache.hadoop.io.Writable>

Throws:

IOException

InterruptedException