MongoCollectionBase<TDocument>.MapReduceAsync<TResult> Method (IClientSessionHandle, BsonJavaScript, BsonJavaScript, MapReduceOptions<TDocument, TResult>, CancellationToken) |
Note: This API is now obsolete.
Executes a map-reduce command.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.20.0+ee01960089f28ea1b501690df5fc9f6318a70242
Syntax[ObsoleteAttribute("Use Aggregation pipeline instead.")]
public virtual Task<IAsyncCursor<TResult>> MapReduceAsync<TResult>(
IClientSessionHandle session,
BsonJavaScript map,
BsonJavaScript reduce,
MapReduceOptions<TDocument, TResult> options = null,
CancellationToken cancellationToken = null
)
<ObsoleteAttribute("Use Aggregation pipeline instead.")>
Public Overridable Function MapReduceAsync(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 Task(Of IAsyncCursor(Of TResult))
[<ObsoleteAttribute("Use Aggregation pipeline instead.")>]
abstract MapReduceAsync :
session : IClientSessionHandle *
map : BsonJavaScript *
reduce : BsonJavaScript *
?options : MapReduceOptions<'TDocument, 'TResult> *
?cancellationToken : CancellationToken
(* Defaults:
let _options = defaultArg options null
let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<IAsyncCursor<'TResult>>
[<ObsoleteAttribute("Use Aggregation pipeline instead.")>]
override MapReduceAsync :
session : IClientSessionHandle *
map : BsonJavaScript *
reduce : BsonJavaScript *
?options : MapReduceOptions<'TDocument, 'TResult> *
?cancellationToken : CancellationToken
(* Defaults:
let _options = defaultArg options null
let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<IAsyncCursor<'TResult>>
Parameters
- session
- Type: MongoDB.Driver.IClientSessionHandle
The session. - map
- Type: MongoDB.Bson.BsonJavaScript
The map function. - reduce
- Type: MongoDB.Bson.BsonJavaScript
The reduce function. - options (Optional)
- Type: MongoDB.Driver.MapReduceOptions<TDocument, TResult>
The options. - cancellationToken (Optional)
- Type: System.Threading.CancellationToken
The cancellation token.
Type Parameters
- TResult
- The type of the result.
Return Value
Type:
Task<IAsyncCursor<TResult>>
A Task whose result is a cursor.
Implements
IMongoCollection<TDocument>.MapReduceAsync<TResult>(IClientSessionHandle, BsonJavaScript, BsonJavaScript, MapReduceOptions<TDocument, TResult>, CancellationToken)
See Also