stored functions execution issue - sql

Question

I have a table from where I want get next lowest priority DVDid, give me that as output and delete it from table. I'm doing this by creating a Package...code gets compiled but when I execute it give me error. Any suggestion?
table:
RENTALQUEUE (MEMBERID, DVDID, DATEADDEDINQUEUE, PRIORITY)
Here is the package:
create or replace
PACKAGE pk_GET_TITLEID AS
procedure sp_GET_TITLEID(memberid_arg IN NUMBER,
titleid_arg out number) ;
end pk_GET_TITLEID;
create or replace
package body pk_GET_TITLEID as
procedure sp_GET_TITLEID
(memberid_arg IN NUMBER,
titleid_arg out number)
IS
v_priority number;
begin
SELECT MIN(PRIORITY)into v_priority
FROM RENTALQUEUE
WHERE memberid = memberid_arg;
DBMS_OUTPUT.PUT_LINE (titleid_arg);
DELETE FROM RENTALQUEUE
WHERE MEMBERID=memberid_arg AND dvdid=titleid_arg;
END sp_GET_TITLEID;
END PK_GET_TITLEID;
Here is how I call it:
execute pk_get_titleid.sp_get_titleid('1');
Here is the error:
Error:
Error starting at line 403 in command:
execute pk_get_titleid.sp_get_titleid('1')
Error report:
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'SP_GET_TITLEID'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause: Usually a PL/SQL compilation error.

Answer 1

The error is:
PLS-00306: wrong number or types of arguments in call to 'SP_GET_TITLEID'
How many parameters does your procedure have in its signature?
procedure sp_GET_TITLEID
(memberid_arg IN NUMBER
, titleid_arg out number)
Two. How many parameters are you passing?
execute pk_get_titleid.sp_get_titleid('1')
One.
An out parameter is still a parameter. You need to include it in the call. Specifically you need a variable in the calling environment which can receive the answer from the called procedure. The fact that your code doesn't actually populate the titleid_arg parameter doesn't affect this.
The non-population of the titleid_arg parameter just highlights the confusion in your code. Perhaps it should be an IN parameter? Perhaps you need to select it from another table? What is the point of v_priority?