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

Interface BytesBytesMultiHashMap.KvSource

All Known Subinterfaces:

MapJoinBytesTableContainer.KeyValueHelper

All Known Implementing Classes:

MapJoinBytesTableContainer.DirectKeyValueWriter

Enclosing class:

BytesBytesMultiHashMap

public static interface BytesBytesMultiHashMap.KvSource

The source of keys and values to put into hashtable; avoids byte copying.

Method Summary

Modifier and Type	Method and Description
byte	updateStateByte(Byte previousValue) Provide updated value for state byte for a key.
void	writeKey(ByteStream.RandomAccessOutput dest) Write key into output.
void	writeValue(ByteStream.RandomAccessOutput dest) Write value into output.

Method Detail

writeKey

void writeKey(ByteStream.RandomAccessOutput dest)
       throws SerDeException

Write key into output.

Throws:

SerDeException

writeValue

void writeValue(ByteStream.RandomAccessOutput dest)
         throws SerDeException

Write value into output.

Throws:

SerDeException

updateStateByte

byte updateStateByte(Byte previousValue)

Provide updated value for state byte for a key.

Parameters:

previousValue - Previous value; null if this is the first call per key.

Returns:

The updated value.