If the transfer method is TRFC, there is unfortunately no way to rerun the job if it was completed successfully, as the job information is not stored. If the job was not successful, the delta remains unchanged.
Using the IDOC transfer method, the job number can be reused.
The main disadvantages of IDOC are that jobs cannot execute in parallel and the row width is limited to 1000 characters.
Note that for the targeted extractor: if the TRFC transfer method is activated, it first needs to be deactivated and then the IDOC transfer method can be activated, please see online help: https://help.qlik.com/en-US/connectors/Content/Home.htm