| 程序包 | 说明 |
|---|---|
| org.apache.hadoop.mapred.join |
Given a set of sorted datasets keyed with the same class and yielding equal
partitions, it is possible to effect a join of those datasets prior to the map.
|
| 类和说明 |
|---|
| ComposableInputFormat
Refinement of InputFormat requiring implementors to provide
ComposableRecordReader instead of RecordReader.
|
| ComposableRecordReader
Additional operations required of a RecordReader to participate in a join.
|
| CompositeRecordReader
A RecordReader that can effect joins of RecordReaders sharing a common key
type and partitioning.
|
| JoinRecordReader
Base class for Composite joins returning Tuples of arbitrary Writables.
|
| MultiFilterRecordReader
Base class for Composite join returning values derived from multiple
sources, but generally not tuples.
|
| Parser.Node |
| Parser.Token
Tagged-union type for tokens from the join expression.
|
| Parser.TType |
| ResetableIterator
This defines an interface to a stateful Iterator that can replay elements
added to it directly.
|
| TupleWritable
Writable type storing multiple
Writables. |
Copyright © 2009 The Apache Software Foundation