ISSAsynchStatus (OLE DB)
ISSAsynchStatus exposes support for SQL Server asynchronous operations. This is an optional interface that inherits from the core OLE DB interface IDBAsynchStatus. In addition to the Abort and GetStatus methods inherited from IDBAsynchStatus, ISSAsynchStatus provides one new method that is used to wait until an asynchronous operation has completed or a time-out occurs.
Method |
Description |
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Cancels an asynchronously executing operation. |
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Returns the status of an asynchronously executing operation. |
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Waits until the asynchronously executing operation is complete or a time-out occurs. |
Remarks
The ISSAsynchStatus implementation of the ISSAsynchStatus::GetStatus method is the same as the IDBAsynchStatus::GetStatus method except that if the initialization of a data source object is aborted, E_UNEXPECTED is returned rather than DB_E_CANCELED (although ISSAsynchStatus::WaitForAsynchCompletion returns DB_E_CANCELED). This is because the data source object is not left in the usual state following an abort operation, so that further initialization operations may be attempted.
The following methods support the use of asynchronous execution in SQL Server:
ICommand::Execute
IOpenRowset::OpenRowset
IMultipleResults::GetResult