org.apache.hadoop.hive.ql.exec.vector
Class VectorizedColumnarSerDe

java.lang.Object
  org.apache.hadoop.hive.serde2.AbstractSerDe
      org.apache.hadoop.hive.serde2.columnar.ColumnarSerDeBase
          org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe
              org.apache.hadoop.hive.ql.exec.vector.VectorizedColumnarSerDe

All Implemented Interfaces:

VectorizedSerde, Deserializer, SerDe, Serializer

public class VectorizedColumnarSerDe
extends ColumnarSerDe
implements VectorizedSerde

VectorizedColumnarSerDe is used by Vectorized query execution engine for columnar based storage supported by RCFile.

Field Summary

Fields inherited from class org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe

LOG, serdeParams

Fields inherited from class org.apache.hadoop.hive.serde2.columnar.ColumnarSerDeBase

cachedObjectInspector, lastOperationDeserialize, lastOperationSerialize, serializedSize, stats

Constructor Summary

VectorizedColumnarSerDe()

Method Summary

Object	deserialize(org.apache.hadoop.io.Writable blob)
void	deserializeVector(Object rowBlob, int rowsInBlob, VectorizedRowBatch reuseBatch) Deserializes the rowBlob into Vectorized row batch
ObjectInspector	getObjectInspector()
SerDeStats	getSerDeStats()
Class<? extends org.apache.hadoop.io.Writable>	getSerializedClass()
org.apache.hadoop.io.Writable	serialize(Object obj, ObjectInspector objInspector)
org.apache.hadoop.io.Writable	serializeVector(VectorizedRowBatch vrg, ObjectInspector objInspector) Serialize a vectorized row batch

Methods inherited from class org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe

initialize, toString

Methods inherited from class org.apache.hadoop.hive.serde2.columnar.ColumnarSerDeBase

initialize

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorizedColumnarSerDe

public VectorizedColumnarSerDe()
                        throws SerDeException

Throws:

SerDeException

Method Detail

serializeVector

public org.apache.hadoop.io.Writable serializeVector(VectorizedRowBatch vrg,
                                                     ObjectInspector objInspector)
                                              throws SerDeException

Serialize a vectorized row batch

Specified by:

serializeVector in interface VectorizedSerde

Parameters:

vrg - Vectorized row batch to serialize

objInspector - The ObjectInspector for the row object

Returns:

The serialized Writable object

Throws:

SerDeException

See Also:

Serializer.serialize(Object, ObjectInspector)

getSerDeStats

public SerDeStats getSerDeStats()

Specified by:

getSerDeStats in interface Deserializer

Specified by:

getSerDeStats in interface Serializer

Overrides:

getSerDeStats in class ColumnarSerDeBase

getSerializedClass

public Class<? extends org.apache.hadoop.io.Writable> getSerializedClass()

Specified by:

getSerializedClass in interface Serializer

Overrides:

getSerializedClass in class ColumnarSerDeBase

deserialize

public Object deserialize(org.apache.hadoop.io.Writable blob)
                   throws SerDeException

Specified by:

deserialize in interface Deserializer

Overrides:

deserialize in class ColumnarSerDeBase

Throws:

SerDeException

getObjectInspector

public ObjectInspector getObjectInspector()
                                   throws SerDeException

Specified by:

getObjectInspector in interface Deserializer

Overrides:

getObjectInspector in class ColumnarSerDeBase

Throws:

SerDeException

serialize

public org.apache.hadoop.io.Writable serialize(Object obj,
                                               ObjectInspector objInspector)
                                        throws SerDeException

Specified by:

serialize in interface Serializer

Overrides:

serialize in class ColumnarSerDe

Throws:

SerDeException

deserializeVector

public void deserializeVector(Object rowBlob,
                              int rowsInBlob,
                              VectorizedRowBatch reuseBatch)
                       throws SerDeException

Deserializes the rowBlob into Vectorized row batch

Specified by:

deserializeVector in interface VectorizedSerde

Parameters:

rowBlob - rowBlob row batch to deserialize

rowsInBlob - Total number of rows in rowBlob to deserialize

reuseBatch - VectorizedRowBatch to which the rows should be serialized *

Throws:

SerDeException