org.apache.hadoop.hive.ql.io
Class OneNullRowInputFormat

java.lang.Object
  org.apache.hadoop.hive.ql.io.NullRowsInputFormat
      org.apache.hadoop.hive.ql.io.OneNullRowInputFormat

All Implemented Interfaces:

org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>, org.apache.hadoop.mapred.JobConfigurable

public class OneNullRowInputFormat
extends NullRowsInputFormat

OneNullRowInputFormat outputs one null row. Used in implementation of metadata only queries.

Nested Class Summary

static class

OneNullRowInputFormat.OneNullRowRecordReader

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.io.NullRowsInputFormat

NullRowsInputFormat.DummyInputSplit, NullRowsInputFormat.NullRowsRecordReader

Constructor Summary

OneNullRowInputFormat()

Method Summary

org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

getRecordReader(org.apache.hadoop.mapred.InputSplit arg0, org.apache.hadoop.mapred.JobConf arg1, org.apache.hadoop.mapred.Reporter arg2)

Methods inherited from class org.apache.hadoop.hive.ql.io.NullRowsInputFormat

configure, getSplits

Methods inherited from class java.lang.Object

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

Constructor Detail

OneNullRowInputFormat

public OneNullRowInputFormat()

Method Detail

getRecordReader

public org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable> getRecordReader(org.apache.hadoop.mapred.InputSplit arg0,
                                                                                                                                  org.apache.hadoop.mapred.JobConf arg1,
                                                                                                                                  org.apache.hadoop.mapred.Reporter arg2)
                                                                                                                           throws IOException

Specified by:

getRecordReader in interface org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.NullWritable>

Overrides:

getRecordReader in class NullRowsInputFormat

Throws:

IOException