The IDTSDataPump interface is used to specify OLE DB source and destination rowsets to be used, add transformations to the data pump, and execute the transfer of data by the data pump.
The AddTransform method returns an error if IDTSDataPump::SetRowsets has not been called, and IDTSDataPump::SetRowsets returns an error if any transformations have been added due to the IDTSDataPumpTransform::ValidateSchema method having been executed against them previously. IDTSDataPump::InitNew reinitializes the IDTSDataPump object.