org.apache.hadoop.hive.serde2.columnar

Class OptimizedLazyBinaryColumnarSerde

java.lang.Object

org.apache.hadoop.hive.serde2.AbstractSerDe

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

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

org.apache.hadoop.hive.serde2.columnar.OptimizedLazyBinaryColumnarSerde

All Implemented Interfaces:

org.apache.hadoop.hive.serde2.Deserializer, org.apache.hadoop.hive.serde2.Serializer

public class OptimizedLazyBinaryColumnarSerde
extends org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe

This is a variant of LazyBinaryColumnarSerDe that avoids a call to StringObjectInspector.getPrimitiveJavaObject() in serialize() to check whether the string is empty (it calls getPrimitiveWritableObject() instead). This improves CPU efficiency by avoiding turning the underlying bytes into a Java String.

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

configErrors

Constructor Summary

Constructors

Constructor and Description
OptimizedLazyBinaryColumnarSerde()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.io.Writable	serialize(java.lang.Object obj, org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector objInspector)

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

initialize, 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

getConfigurationErrors, initialize, shouldStoreFieldsInMetastore

Methods inherited from class java.lang.Object

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

Constructor Detail

OptimizedLazyBinaryColumnarSerde

public OptimizedLazyBinaryColumnarSerde()

Method Detail

serialize

public org.apache.hadoop.io.Writable serialize(java.lang.Object obj,
                                               org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector objInspector)
                                        throws org.apache.hadoop.hive.serde2.SerDeException

Specified by:

serialize in interface org.apache.hadoop.hive.serde2.Serializer

Overrides:

serialize in class org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe

Throws:

org.apache.hadoop.hive.serde2.SerDeException