org.apache.hadoop.hive.contrib.mr

Interface Reducer

public interface Reducer

Simple reducer interface.

Method Summary

Modifier and Type	Method and Description
void	reduce(String key, Iterator<String[]> records, Output output) Reduce.

Method Detail

reduce

void reduce(String key,
            Iterator<String[]> records,
            Output output)
     throws Exception

Reduce. Note that it is assumed that the key is the first column. Additionally, the key will be repeated as the first column in the records[] array.

Parameters:

key - key (first column) for this set of records.

records - Iterator of records for this key. Note that the first column of record will also be the key.

output -

Throws:

Exception