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

Class OrcSerde

java.lang.Object

org.apache.hadoop.hive.serde2.AbstractSerDe

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

All Implemented Interfaces:

Deserializer, SchemaInference, SerDe, Serializer

public class OrcSerde
extends AbstractSerDe
implements SchemaInference

A serde class for ORC. It transparently passes the object to/from the ORC file reader/writer. This SerDe does not support statistics, since serialized size doesn't make sense in the context of ORC files.

Field Summary

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

configuration, log, partitionProperties, properties, tableProperties

Constructor Summary

Constructors

Constructor and Description
OrcSerde()

Method Summary

Modifier and Type	Method and Description
Object	deserialize(org.apache.hadoop.io.Writable writable)
ObjectInspector	getObjectInspector()
Class<? extends org.apache.hadoop.io.Writable>	getSerializedClass()
void	initialize(org.apache.hadoop.conf.Configuration configuration, Properties tableProperties, Properties partitionProperties)
protected List<TypeInfo>	parseColumnTypes() NOTE: if "columns.types" is missing, all columns will be of String type.
List<org.apache.hadoop.hive.metastore.api.FieldSchema>	readSchema(org.apache.hadoop.conf.Configuration conf, String file)
org.apache.hadoop.io.Writable	serialize(Object realRow, ObjectInspector inspector)

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

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

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

OrcSerde

public OrcSerde()

Method Detail

initialize

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

Overrides:

initialize in class AbstractSerDe

Throws:

SerDeException

parseColumnTypes

protected List<TypeInfo> parseColumnTypes()

NOTE: if "columns.types" is missing, all columns will be of String type.

Overrides:

parseColumnTypes in class AbstractSerDe

getSerializedClass

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

Specified by:

getSerializedClass in interface Serializer

Specified by:

getSerializedClass in class AbstractSerDe

serialize

public org.apache.hadoop.io.Writable serialize(Object realRow,
                                               ObjectInspector inspector)

Specified by:

serialize in interface Serializer

Overrides:

serialize in class AbstractSerDe

deserialize

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

Specified by:

deserialize in interface Deserializer

Overrides:

deserialize in class AbstractSerDe

Throws:

SerDeException

getObjectInspector

public ObjectInspector getObjectInspector()
                                   throws SerDeException

Specified by:

getObjectInspector in interface Deserializer

Throws:

SerDeException

readSchema

public List<org.apache.hadoop.hive.metastore.api.FieldSchema> readSchema(org.apache.hadoop.conf.Configuration conf,
                                                                         String file)
                                                                  throws SerDeException

Specified by:

readSchema in interface SchemaInference

Throws:

SerDeException