org.apache.hadoop.hive.serde2.columnar

Class LazyBinaryColumnarSerDe

java.lang.Object

org.apache.hadoop.hive.serde2.AbstractSerDe

org.apache.hadoop.hive.serde2.columnar.ColumnarSerDeBase

org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe

All Implemented Interfaces:

Deserializer, SerDe, Serializer

public class LazyBinaryColumnarSerDe
extends ColumnarSerDeBase

LazyBinaryColumnarSerDe. This serde combines elements of columnar serde and lazybinary serde to produce a serde which serializes columns into a BytesRefArrayWritable in a compact binary format and which is deserialized in a lazy, i.e. on-demand fashion.

Field Summary

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

cachedObjectInspector, lastOperationDeserialize, lastOperationSerialize, serializedSize, stats

Fields inherited from class org.apache.hadoop.hive.serde2.AbstractSerDe

configuration, log, partitionProperties, properties, tableProperties

Constructor Summary

Constructors

Constructor and Description
LazyBinaryColumnarSerDe()

Method Summary

Modifier and Type	Method and Description
void	initialize(org.apache.hadoop.conf.Configuration configuration, Properties tableProperties, Properties partitionProperties) Initialize the SerDe.
org.apache.hadoop.io.Writable	serialize(Object obj, ObjectInspector objInspector) Serialize an object by navigating inside the Object with the ObjectInspector.
String	toString()

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

deserialize, getObjectInspector, getSerDeStats, getSerializedClass, initialize

Methods inherited from class org.apache.hadoop.hive.serde2.AbstractSerDe

getColumnComments, getColumnNames, getColumnTypes, getConfiguration, getPartitionColumnComments, getPartitionColumnNames, getPartitionColumnTypes, parseColumnComments, parseColumnNames, parseColumnNames, parseColumnTypes, parseColumnTypes, shouldStoreFieldsInMetastore

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hive.serde2.SerDe

handleJobLevelConfiguration

Constructor Detail

LazyBinaryColumnarSerDe

public LazyBinaryColumnarSerDe()

Method Detail

toString

public String toString()

Overrides:

toString in class AbstractSerDe

initialize

public void initialize(org.apache.hadoop.conf.Configuration configuration,
                       Properties tableProperties,
                       Properties partitionProperties)
                throws SerDeException

Description copied from class: AbstractSerDe

Initialize the SerDe. By default, this will use one set of properties, either the table properties or the partition properties. If a SerDe needs access to both sets, it should override this method. Eventually, once all SerDes have implemented this method, we should convert it to an abstract method.

Overrides:

initialize in class AbstractSerDe

Parameters:

configuration - Hadoop configuration

tableProperties - Table properties

partitionProperties - Partition properties (may be null if table has no partitions)

Throws:

SerDeException - if SerDe fails to initialize

serialize

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

Description copied from interface: Serializer

Serialize an object by navigating inside the Object with the ObjectInspector. In most cases, the return value of this function will be constant since the function will reuse the Writable object. If the client wants to keep a copy of the Writable, the client needs to clone the returned value.

Specified by:

serialize in interface Serializer

Overrides:

serialize in class AbstractSerDe

Throws:

SerDeException