ممكن أحد يشرحلي هذا الكود

FOR user_rec IN USER_LIST LOOP

SELECT SSM_ALT_USRLVL_CODE_SEQ.NEXTVAL INTO CODE FROM DUAL;
dbms_output.put_line('ROLECODE::'||M_ROLECODE);
dbms_output.put_line('alertcode::'||M_alertcode);
dbms_output.put_line('code::'||CODE);
dbms_output.put_line('user code::'||user_rec.user_code);
dbms_output.put_line('message::'||message);
dbms_output.put_line('txn_code::'||txn_code);