org.apache.hadoop.hive.ql.exec.persistence

Class MapJoinKey

java.lang.Object

org.apache.hadoop.hive.ql.exec.persistence.MapJoinKey

Direct Known Subclasses:

MapJoinKeyObject

public abstract class MapJoinKey
extends Object

The base class for MapJoinKey. Ideally, this should now be removed, some table wrappers have no key object.

Constructor Summary

Constructors

Constructor and Description
MapJoinKey()

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	hasAnyNulls(int fieldCount, boolean[] nullsafes)
static boolean	isSupportedField(ObjectInspector foi)
static boolean	isSupportedField(String typeName)
static MapJoinKey	read(ByteStream.Output output, MapJoinObjectSerDeContext context, org.apache.hadoop.io.Writable writable)
static MapJoinKey	readFromRow(ByteStream.Output output, MapJoinKey key, Object[] keyObject, List<ObjectInspector> keyFieldsOI, boolean mayReuseKey)
static MapJoinKey	readFromVector(ByteStream.Output output, MapJoinKey key, Object[] keyObject, List<ObjectInspector> keyOIs, boolean mayReuseKey)
static ByteStream.Output	serializeRow(ByteStream.Output byteStream, Object[] fieldData, List<ObjectInspector> fieldOis, boolean[] sortableSortOrders) Serializes row to output.
static ByteStream.Output	serializeVector(ByteStream.Output byteStream, VectorHashKeyWrapper kw, VectorExpressionWriter[] keyOutputWriters, VectorHashKeyWrapperBatch keyWrapperBatch, boolean[] nulls, boolean[] sortableSortOrders) Serializes row to output for vectorized path.
abstract void	write(MapJoinObjectSerDeContext context, ObjectOutputStream out)

Methods inherited from class java.lang.Object

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

Constructor Detail

MapJoinKey

public MapJoinKey()

Method Detail

write

public abstract void write(MapJoinObjectSerDeContext context,
         ObjectOutputStream out)
                    throws IOException,
                           SerDeException

Throws:

IOException

SerDeException

hasAnyNulls

public abstract boolean hasAnyNulls(int fieldCount,
                  boolean[] nullsafes)

read

public static MapJoinKey read(ByteStream.Output output,
              MapJoinObjectSerDeContext context,
              org.apache.hadoop.io.Writable writable)
                       throws SerDeException,
                              HiveException

Throws:

SerDeException

HiveException

isSupportedField

public static boolean isSupportedField(ObjectInspector foi)

isSupportedField

public static boolean isSupportedField(String typeName)

readFromVector

public static MapJoinKey readFromVector(ByteStream.Output output,
                        MapJoinKey key,
                        Object[] keyObject,
                        List<ObjectInspector> keyOIs,
                        boolean mayReuseKey)
                                 throws HiveException

Throws:

HiveException

serializeVector

public static ByteStream.Output serializeVector(ByteStream.Output byteStream,
                                VectorHashKeyWrapper kw,
                                VectorExpressionWriter[] keyOutputWriters,
                                VectorHashKeyWrapperBatch keyWrapperBatch,
                                boolean[] nulls,
                                boolean[] sortableSortOrders)
                                         throws HiveException,
                                                SerDeException

Serializes row to output for vectorized path.

Parameters:

byteStream - Output to reuse. Can be null, in that case a new one would be created.

Throws:

HiveException

SerDeException

readFromRow

public static MapJoinKey readFromRow(ByteStream.Output output,
                     MapJoinKey key,
                     Object[] keyObject,
                     List<ObjectInspector> keyFieldsOI,
                     boolean mayReuseKey)
                              throws HiveException

Throws:

HiveException

serializeRow

public static ByteStream.Output serializeRow(ByteStream.Output byteStream,
                             Object[] fieldData,
                             List<ObjectInspector> fieldOis,
                             boolean[] sortableSortOrders)
                                      throws HiveException

Serializes row to output.

Parameters:

byteStream - Output to reuse. Can be null, in that case a new one would be created.

Throws:

HiveException