## Uses of Package
org.apache.hadoop.mapred.join

Packages that use org.apache.hadoop.mapred.join
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.

Classes in org.apache.hadoop.mapred.join used by org.apache.hadoop.mapred.join
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 `Writable`s.

Copyright © 2009 The Apache Software Foundation