SUBMIT rsbdcbtc statement

Hello Experts,

In my batch job program, a BDC session is created & executed using the below code

SUBMIT rsbdcbtc

WITH queue_id EQ gv_qid

AND RETURN.

WRITE: 'Success'.

Please let me know whether

1. The Write statement will be called after the processing of BDC Session has started

OR

2. The Write statement will be called after the processing of BDC Session is complete

Thanks & Regards,

Sanket.