§ 109. Petitioner to be released from imprisonment. If, at the time the discharge is granted, the petitioner is imprisoned, by virtue of an execution against his person issued, or of an order of arrest made, in an action or special proceeding founded upon a debt, liability, or judgment, as to which he is exempted from arrest or imprisonment, as prescribed in the last section but one, the officer must forthwith release him, on production of the discharge, or a certified copy of the record thereof.