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JoinStrategy (Apache Crunch 0.7.0 API)
org.apache.crunch.lib.join
Interface JoinStrategy<K,U,V>
- All Superinterfaces:
- Serializable
- All Known Implementing Classes:
- BloomFilterJoinStrategy, DefaultJoinStrategy, MapsideJoinStrategy, ShardedJoinStrategy
public interface JoinStrategy<K,U,V>
- extends Serializable
Defines a strategy for joining two PTables together on a common key.
join
PTable<K,Pair<U,V>> join(PTable<K,U> left,
PTable<K,V> right,
JoinType joinType)
- Join two tables with the given join type.
- Parameters:
left
- left table to be joinedright
- right table to be joinedjoinType
- type of join to perform
- Returns:
- joined tables
Copyright © 2013 The Apache Software Foundation. All Rights Reserved.