DBMS_SCHEDULER.CREATE_PROGRAM with Optional input parameters

Question

I have a procedure that has a number of "optional" parameters.
procedure get_files(
file_name_in in varchar2 default 'dummy_file',
layout_in in number default 1,
client_in in number default null,
data_supplier_in in number default 99999
This procedure can be called with any combination of the input parameters.
I can set up program(s) using the DBMS_SCHEDULER.CREATE_PROGRAM procedure using a program_type => 'PLSQL_BLOCK' like this:
begin
sys.dbms_scheduler.create_program(
program_name => 'GET_MY_FILES',
program_action => '
declare
begin
get_files( layout_in => 11111, client_in => 2222 );
end ;',
program_type => 'PLSQL_BLOCK',
number_of_arguments => 0);
end;
My question is: Can I set up programs(s) using the DBMS_SCHEDULER.CREATE_PROGRAM procedure using a program_type => 'STORED_PROCEDURE' when I have "optional" parameters?
It appears that ALL of the program input parameters must be defined and there is no way to indicate that a parameters is "optional".

Answer 1

Yes you can do it.
You can defined default values for program parameters, but this values are "constants". So if your default value of parameter is defined by function call you have a problem, because you have to specify this parametr every time.
procedure my_proc(p_date IN DATE := SYSDATE) AS
...There is my example, it using DBADMIN schema create this schema or replace it.
create or replace procedure dbadmin.sleep(p_interval in number)
as
begin
  dbms_lock.sleep(p_interval);
end;
--program definition
begin
    dbms_scheduler.create_program(program_name => 'dbadmin.prg_test1',
                                  program_type => 'STORED_PROCEDURE',
                                  program_action => 'dbadmin.sleep',
                                  number_of_arguments => 1);
    dbms_scheduler.define_program_argument(program_name => 'dbadmin.prg_test1',argument_position => 1,argument_type => 'NUMBER',default_value => 60);
    dbms_scheduler.enable(name => 'dbadmin.prg_test1');                                 
end;
--check that program was created
select * from dba_scheduler_programs
where owner='DBADMIN';
select * from dba_scheduler_program_args
where owner='DBADMIN';
BEGIN
    dbms_scheduler.create_job(job_name        => 'dbadmin.job_program1',
                              program_name    => 'dbadmin.prg_test1',
                              start_date      => to_timestamp_tz('1.1.2010 12:00 Europe/Prague', 'dd.mm.yyyy hh24:mi tzr'),
                              repeat_interval => 'FREQ=minutely; INTERVAL=2;BYSECOND=0',
                              auto_drop       => FALSE);
    dbms_scheduler.enable(name => 'dbadmin.job_program1');
END;
--job run checks
SELECT *
FROM   dba_scheduler_jobs j
WHERE  j.JOB_NAME = 'JOB_PROGRAM1';
SELECT *
FROM   dba_scheduler_job_log jl
WHERE  jl.JOB_NAME = 'JOB_PROGRAM1';
SELECT *
FROM   dba_scheduler_job_run_details jr
WHERE  jr.JOB_NAME = 'JOB_PROGRAM1';   
--now set job parametr
BEGIN
    dbms_scheduler.set_job_argument_value(job_name => 'dbadmin.job_program1', argument_position => 1, argument_value => 30);
END;
--clean up
BEGIN
    dbms_scheduler.drop_job(job_name => 'dbadmin.job_program1', force => TRUE);
    dbms_scheduler.drop_program(program_name => 'dbadmin.prg_test1');
    dbms_scheduler.purge_log;
END;
/