| Package | Description | 
|---|---|
| org.apache.crunch | Client-facing API and core abstractions. | 
| org.apache.crunch.lib | Joining, sorting, aggregating, and other commonly used functionality. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <V1,V2,V3> PType<Tuple3.Collect<V1,V2,V3>> | Tuple3.Collect. derived(PType<V1> first,
       PType<V2> second,
       PType<V3> third) | 
| Modifier and Type | Method and Description | 
|---|---|
| static <K,V1,V2,V3> | Cogroup. cogroup(int numReducers,
       PTable<K,V1> first,
       PTable<K,V2> second,
       PTable<K,V3> third)Co-groups the three  PTablearguments with a user-specified degree of parallelism (a.k.a, number of
 reducers.) | 
| static <K,V1,V2,V3> | Cogroup. cogroup(PTable<K,V1> first,
       PTable<K,V2> second,
       PTable<K,V3> third)Co-groups the three  PTablearguments. | 
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