create or replace procedure job_usr is
	-- recalc_task_return_seizure
	c_job_prefix varchar2(20) := 'USR_PREFIX_';
	c_job_owner  varchar2(3) := 'USR';
	l_job_name   varchar2(30);
	l_cnt_run    number;
	l_cnt_prm    number;
begin
for i in 1 .. 10 loop	
l_job_name := dbms_scheduler.generate_job_name(c_job_prefix);
	dbms_scheduler.create_job(job_name => c_job_owner || '.' || l_job_name, job_type => 'PLSQL_BLOCK',
job_action => 'begin job_usr; end;', start_date => null, repeat_interval => null, enabled => true, auto_drop => true);
end;
end loop;

declare
  l_error exception;
  pragma exception_init(l_error, -27475);
begin
  begin
    sys.dbms_scheduler.drop_job(job_name => 'USR.JOB_USR');
  exception
    when l_error then
      null;
    when others then
      raise;
  end;
  sys.dbms_scheduler.create_job(job_name        => 'USR.JOB_USR', 
                                job_type        => 'PLSQL_BLOCK',
                                job_action      => 'begin job_usr; end;',
                                start_date      => to_date(null),
                                repeat_interval => 'Freq=Secondly;Interval=5',
                                end_date        => to_date(null),
                                job_class       => '"DEFAULT_JOB_CLASS"',
                                enabled         => true,
                                auto_drop       => false,
                                comments        => 'job usr');
end;
/