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Returns the approximate count of unique values that match the query.
Requires permission to access the GetCardinality action.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginGetCardinality and EndGetCardinality.
Namespace: Amazon.IoT
Assembly: AWSSDK.IoT.dll
Version: 3.x.y.z
public virtual Task<GetCardinalityResponse> GetCardinalityAsync( GetCardinalityRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the GetCardinality service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| IndexNotReadyException | The index is not ready. |
| InternalFailureException | An unexpected error has occurred. |
| InvalidAggregationException | The aggregation is invalid. |
| InvalidQueryException | The query is invalid. |
| InvalidRequestException | The request is not valid. |
| ResourceNotFoundException | The specified resource does not exist. |
| ServiceUnavailableException | The service is temporarily unavailable. |
| ThrottlingException | The rate exceeds the limit. |
| UnauthorizedException | You are not authorized to perform this operation. |
.NET Core App:
Supported in: 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5