org.apache.hadoop.hive.ql.io.orc

Class OrcRawRecordMerger

java.lang.Object

org.apache.hadoop.hive.ql.io.orc.OrcRawRecordMerger

All Implemented Interfaces:

Closeable, AutoCloseable, AcidInputFormat.RawReader<OrcStruct>, org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

public class OrcRawRecordMerger
extends Object
implements AcidInputFormat.RawReader<OrcStruct>

Merges a base and a list of delta files together into a single stream of events.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OrcRawRecordMerger.ReaderKey A RecordIdentifier extended with the current write id.

Field Summary

Fields

Modifier and Type	Field and Description
protected OrcRawRecordMerger.ReaderKey	prevKey

Method Summary

Modifier and Type	Method and Description
void	close()
protected boolean	collapse(RecordIdentifier recordIdentifier)
OrcRawRecordMerger.ReaderKey	createKey()
OrcStruct	createValue()
int	getColumns() Get the number of columns in the underlying rows.
ObjectInspector	getObjectInspector()
long	getPos()
float	getProgress()
boolean	isDelete(OrcStruct value)
boolean	next(RecordIdentifier recordIdentifier, OrcStruct prev)

Methods inherited from class java.lang.Object

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

Field Detail

prevKey

protected final OrcRawRecordMerger.ReaderKey prevKey

Method Detail

next

public boolean next(RecordIdentifier recordIdentifier,
                    OrcStruct prev)
             throws IOException

Specified by:

next in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

Throws:

IOException

collapse

protected boolean collapse(RecordIdentifier recordIdentifier)

createKey

public OrcRawRecordMerger.ReaderKey createKey()

Specified by:

createKey in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

createValue

public OrcStruct createValue()

Specified by:

createValue in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

getPos

public long getPos()
            throws IOException

Specified by:

getPos in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

Throws:

IOException

getProgress

public float getProgress()
                  throws IOException

Specified by:

getProgress in interface org.apache.hadoop.mapred.RecordReader<RecordIdentifier,OrcStruct>

Throws:

IOException

getObjectInspector

public ObjectInspector getObjectInspector()

Specified by:

getObjectInspector in interface AcidInputFormat.RawReader<OrcStruct>

isDelete

public boolean isDelete(OrcStruct value)

Specified by:

isDelete in interface AcidInputFormat.RawReader<OrcStruct>

getColumns

public int getColumns()

Get the number of columns in the underlying rows.

Returns:

0 if there are no base and no deltas.