| Name | Description | Type | Package | Framework |
| DistinctCombiner | A special implementation of combiner used only for distinct. | Class | org.apache.pig.backend.hadoop.executionengine.mapReduceLayer | Apache Pig |
| DistinctCombiner .Combine | Class | org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.DistinctCombiner | Apache Pig | |