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# Asynchronous Actions

When you send an asynchronous action to ODBC Connector, the connector adds the task to a queue and returns a token. ODBC Connector performs the task when a thread becomes available. You can use the token with the `QueueInfo` action to check the status of the action and retrieve the results of the action.

Most of the features provided by the connector are available through `action=fetch`, so when you use the `QueueInfo` action, query the `fetch` action queue, for example:

         /action=QueueInfo&QueueName=Fetch&QueueAction=GetStatus

## Check the Status of an Asynchronous Action

To check the status of an asynchronous action, use the token that was returned by ODBC Connector with the `QueueInfo` action. For more information about the `QueueInfo` action, refer to the ODBC Connector Reference.

To check the status of an asynchronous action

- Send the `QueueInfo` action to ODBC Connector with the following parameters.

  `QueueName` | The name of the action queue that you want to check.
  `QueueAction` | The action to perform. Set this parameter to `GetStatus`.
  `Token` | (Optional) The token that the asynchronous action returned. If you do not specify a token, ODBC Connector returns the status of every action in the queue.

For example:

    /action=QueueInfo&QueueName=fetch&QueueAction=getstatus&Token=...

## Cancel an Asynchronous Action that is Queued

To cancel an asynchronous action that is waiting in a queue, use the following procedure.

To cancel an asynchronous action that is queued

- Send the `QueueInfo` action to ODBC Connector with the following parameters.

  `QueueName` | The name of the action queue that contains the action to cancel.
  `QueueAction` | The action to perform . Set this parameter to `Cancel`.
  `Token` | The token that the asynchronous action returned.

For example:

    /action=QueueInfo&QueueName=fetch&QueueAction=Cancel&Token=...

## Stop an Asynchronous Action that is Running

You can stop an asynchronous action at any point.

To stop an asynchronous action that is running

- Send the `QueueInfo` action to ODBC Connector with the following parameters.

  `QueueName` | The name of the action queue that contains the action to stop.
  `QueueAction` | The action to perform. Set this parameter to `Stop`.
  `Token` | The token that the asynchronous action returned.

For example:

    /action=QueueInfo&QueueName=fetch&QueueAction=Stop&Token=...

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