org.apache.hadoop.hive.ql.io.rcfile.truncate
Class ColumnTruncateMapper

java.lang.Object
  org.apache.hadoop.mapred.MapReduceBase
      org.apache.hadoop.hive.ql.io.rcfile.truncate.ColumnTruncateMapper

All Implemented Interfaces:

Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<Object,RCFileValueBufferWrapper,Object,Object>

public class ColumnTruncateMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<Object,RCFileValueBufferWrapper,Object,Object>

Field Summary

static String	BACKUP_PREFIX
static org.apache.commons.logging.Log	LOG

Constructor Summary

ColumnTruncateMapper()

Method Summary

static org.apache.hadoop.fs.Path	backupOutputPath(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path outpath, org.apache.hadoop.mapred.JobConf job)
void	close()
void	configure(org.apache.hadoop.mapred.JobConf job)
static void	jobClose(org.apache.hadoop.fs.Path outputPath, boolean success, org.apache.hadoop.mapred.JobConf job, SessionState.LogHelper console, DynamicPartitionCtx dynPartCtx, org.apache.hadoop.mapred.Reporter reporter)
void	map(Object k, RCFileValueBufferWrapper value, org.apache.hadoop.mapred.OutputCollector<Object,Object> output, org.apache.hadoop.mapred.Reporter reporter)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

BACKUP_PREFIX

public static String BACKUP_PREFIX

Constructor Detail

ColumnTruncateMapper

public ColumnTruncateMapper()

Method Detail

configure

public void configure(org.apache.hadoop.mapred.JobConf job)

Specified by:

configure in interface org.apache.hadoop.mapred.JobConfigurable

Overrides:

configure in class org.apache.hadoop.mapred.MapReduceBase

map

public void map(Object k,
                RCFileValueBufferWrapper value,
                org.apache.hadoop.mapred.OutputCollector<Object,Object> output,
                org.apache.hadoop.mapred.Reporter reporter)
         throws IOException

Specified by:

map in interface org.apache.hadoop.mapred.Mapper<Object,RCFileValueBufferWrapper,Object,Object>

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class org.apache.hadoop.mapred.MapReduceBase

Throws:

IOException

backupOutputPath

public static org.apache.hadoop.fs.Path backupOutputPath(org.apache.hadoop.fs.FileSystem fs,
                                                         org.apache.hadoop.fs.Path outpath,
                                                         org.apache.hadoop.mapred.JobConf job)
                                                  throws IOException,
                                                         HiveException

Throws:

IOException

HiveException

jobClose

public static void jobClose(org.apache.hadoop.fs.Path outputPath,
                            boolean success,
                            org.apache.hadoop.mapred.JobConf job,
                            SessionState.LogHelper console,
                            DynamicPartitionCtx dynPartCtx,
                            org.apache.hadoop.mapred.Reporter reporter)
                     throws HiveException,
                            IOException

Throws:

HiveException

IOException