org.apache.carbondata.hadoop

Class CarbonRecordReader<T>

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<Void,T>

org.apache.carbondata.hadoop.AbstractRecordReader<T>

org.apache.carbondata.hadoop.CarbonRecordReader<T>

All Implemented Interfaces:

Closeable, AutoCloseable

public class CarbonRecordReader<T>
extends AbstractRecordReader<T>

Reads the data from Carbon store.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.carbondata.common.CarbonIterator<Object[]>	carbonIterator
protected org.apache.carbondata.core.scan.executor.QueryExecutor	queryExecutor
protected org.apache.carbondata.core.scan.model.QueryModel	queryModel
protected CarbonReadSupport<T>	readSupport

Fields inherited from class org.apache.carbondata.hadoop.AbstractRecordReader

rowCount

Constructor Summary

Constructors

Constructor and Description
CarbonRecordReader(org.apache.carbondata.core.scan.model.QueryModel queryModel, CarbonReadSupport<T> readSupport, org.apache.hadoop.conf.Configuration configuration)
CarbonRecordReader(org.apache.carbondata.core.scan.model.QueryModel queryModel, CarbonReadSupport<T> readSupport, InputMetricsStats inputMetricsStats, org.apache.hadoop.conf.Configuration configuration)

Method Summary

Modifier and Type	Method and Description
void	close()
Void	getCurrentKey()
T	getCurrentValue()
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit inputSplit, org.apache.hadoop.mapreduce.TaskAttemptContext context)
boolean	nextKeyValue()
void	setSkipClearDataMapAtClose(boolean skipClearDataMapAtClose)

Methods inherited from class org.apache.carbondata.hadoop.AbstractRecordReader

logStatistics

Methods inherited from class java.lang.Object

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

Field Detail

queryModel

protected org.apache.carbondata.core.scan.model.QueryModel queryModel

readSupport

protected CarbonReadSupport<T> readSupport

carbonIterator

protected org.apache.carbondata.common.CarbonIterator<Object[]> carbonIterator

queryExecutor

protected org.apache.carbondata.core.scan.executor.QueryExecutor queryExecutor

Constructor Detail

CarbonRecordReader

public CarbonRecordReader(org.apache.carbondata.core.scan.model.QueryModel queryModel,
                          CarbonReadSupport<T> readSupport,
                          InputMetricsStats inputMetricsStats,
                          org.apache.hadoop.conf.Configuration configuration)

CarbonRecordReader

public CarbonRecordReader(org.apache.carbondata.core.scan.model.QueryModel queryModel,
                          CarbonReadSupport<T> readSupport,
                          org.apache.hadoop.conf.Configuration configuration)

Method Detail

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit inputSplit,
                       org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws IOException,
                       InterruptedException

Specified by:

initialize in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

Throws:

IOException

InterruptedException

nextKeyValue

public boolean nextKeyValue()

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

getCurrentKey

public Void getCurrentKey()
                   throws IOException,
                          InterruptedException

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

Throws:

IOException

InterruptedException

getCurrentValue

public T getCurrentValue()
                  throws IOException,
                         InterruptedException

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

Throws:

IOException

InterruptedException

getProgress

public float getProgress()
                  throws IOException,
                         InterruptedException

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

Throws:

IOException

InterruptedException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in class org.apache.hadoop.mapreduce.RecordReader<Void,T>

Throws:

IOException

setSkipClearDataMapAtClose

public void setSkipClearDataMapAtClose(boolean skipClearDataMapAtClose)