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MapReduceOutputMode Enumeration
Represents the map-reduce output mode.

Namespace: MongoDB.Driver.Core.Operations
Assembly: MongoDB.Driver.Core (in MongoDB.Driver.Core.dll) Version: 2.4.1
Syntax
public enum MapReduceOutputMode
Members
  Member nameValueDescription
Replace0 The output of the map-reduce operation replaces the output collection.
Merge1 The output of the map-reduce operation is merged with the output collection. If an existing document has the same key as the new result, overwrite the existing document.
Reduce2 The output of the map-reduce operation is merged with the output collection. If an existing document has the same key as the new result, apply the reduce function to both the new and the existing documents and overwrite the existing document with the result.
See Also