IMongoCollectionTDocumentMapReduceAsyncTResult Method (BsonJavaScript, BsonJavaScript, MapReduceOptionsTDocument, TResult, CancellationToken) |
Note: This API is now obsolete.
Executes a map-reduce command.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.22.0+75246110ed1247226fcc7f8eb2c54ffab745693e
Syntax [ObsoleteAttribute("Use Aggregation pipeline instead.")]
Task<IAsyncCursor<TResult>> MapReduceAsync<TResult>(
BsonJavaScript map,
BsonJavaScript reduce,
MapReduceOptions<TDocument, TResult> options = null,
CancellationToken cancellationToken = default
)
<ObsoleteAttribute("Use Aggregation pipeline instead.")>
Function MapReduceAsync(Of TResult) (
map As BsonJavaScript,
reduce As BsonJavaScript,
Optional options As MapReduceOptions(Of TDocument, TResult) = Nothing,
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of IAsyncCursor(Of TResult))
[<ObsoleteAttribute("Use Aggregation pipeline instead.")>]
abstract MapReduceAsync :
map : BsonJavaScript *
reduce : BsonJavaScript *
?options : MapReduceOptions<'TDocument, 'TResult> *
?cancellationToken : CancellationToken
(* Defaults:
let _options = defaultArg options null
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<IAsyncCursor<'TResult>>
Parameters
- 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:
TaskIAsyncCursorTResultA Task whose result is a cursor.
See Also