Help Execute simple Stored Procedure - (please)

Question

When calling a simple Procedure from SQL Developer I am unable effectively utilize a value I am passing in. From a Worksheet I press 'Run Script' which executes this:
DECLARE
TICKET_ID NUMBER;
v_Return VARCHAR2(200);
BEGIN
TICKET_ID := NULL;
v_Return := GET_LOGISTIC_INFO(TICKET_ID => 1900710);
DBMS_OUTPUT.PUT_LINE('v_Return = ' || v_Return);
END;
The following stored procedure:
CREATE OR REPLACE
function get_logistic_info(ticket_id IN NUMBER) RETURN VARCHAR2 IS
ret_name VARCHAR2(256);
BEGIN
--Not Working
select logistics_method_id INTO ret_name from stub_trans where id=ticket_id;
--Works! 
--select logistics_method_id INTO ret_name from stub_trans where id=1900710;       
return ret_name;
END;
When I hard code the ticket_id the Procedures runs just fine but when I try and utilized the passed in variable I get the error message:
ORA-01403: no data found
The record exists because if I use the hard-coded value I get a proper return:
anonymous block completed
v_Return = 4
Any ideas?

Answer 1

Is there a separate column in the stub_trans table called ticket_id? If there is, then you are just running the following (regardless of what you pass as the parameter):
select stub_trans.logistics_method_id INTO ret_name from stub_trans where stub_trans.id=stub_trans.ticket_id;
If this is the case, then either rename you parameter:
function get_logistic_info(p_ticket_id IN NUMBER) RETURN VARCHAR2 IS
or you can force PL/SQL to use the parameter, by referencing it more fully in your SQL, ie:
select logistics_method_id INTO ret_name from stub_trans where id=get_logistic_info.ticket_id;