Submitting background job / Calling BDC within this job

All,

I have written a logic to create a background job as below from a ALV Grid output.

SUBMIT z_job TO SAP-SPOOL

                           SPOOL PARAMETERS l_print_parameters

                           WITHOUT SPOOL DYNPRO.

Questions:

1) Is the z_job being executed in background ? If not, then how do i achieve that.

2) I have a requirement to call a bdc within this Submit program and that bdc should be triggered automatically in background. Is this possible?

Regards,

Salil