| IMongoCollectionTDocumentMapReduceTResult Method (IClientSessionHandle, BsonJavaScript, BsonJavaScript, MapReduceOptionsTDocument, TResult, CancellationToken) | 
 
            Executes a map-reduce command.
            
 
    Namespace: 
   MongoDB.Driver
    Assembly:
   MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.11.0+cb27a82ea70620ad1acad8058809be8302ae4f2a
 Syntax
SyntaxIAsyncCursor<TResult> MapReduce<TResult>(
	IClientSessionHandle session,
	BsonJavaScript map,
	BsonJavaScript reduce,
	MapReduceOptions<TDocument, TResult> options = null,
	CancellationToken cancellationToken = null
)
Function MapReduce(Of TResult) ( 
	session As IClientSessionHandle,
	map As BsonJavaScript,
	reduce As BsonJavaScript,
	Optional options As MapReduceOptions(Of TDocument, TResult) = Nothing,
	Optional cancellationToken As CancellationToken = Nothing
) As IAsyncCursor(Of TResult)
abstract MapReduce : 
        session : IClientSessionHandle * 
        map : BsonJavaScript * 
        reduce : BsonJavaScript * 
        ?options : MapReduceOptions<'TDocument, 'TResult> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _options = defaultArg options null
        let _cancellationToken = defaultArg cancellationToken null
*)
-> IAsyncCursor<'TResult> 
Parameters
- session
- Type: MongoDB.DriverIClientSessionHandle
 The session.
- map
- Type: MongoDB.BsonBsonJavaScript
 The map function.
- reduce
- Type: MongoDB.BsonBsonJavaScript
 The reduce function.
- options (Optional)
- Type: MongoDB.DriverMapReduceOptionsTDocument, TResult
 The options.
- cancellationToken (Optional)
- Type: System.ThreadingCancellationToken
 The cancellation token.
Type Parameters
- TResult
- The type of the result.
Return Value
Type: 
IAsyncCursorTResult
            A cursor.
            
 See Also
See Also