PL/SQL Stored Procedure EXCEPTION not working

Hi Experts,

I have a stored procedure I am writing for an on-line class and cannot figure out what I am doing wrong. I need the procedure to write to an error table "order_errors" for any error that occurs while trying to execute it.

The package is called "Process_Orders" and the procedure is called "Add_Order". There are three parameters for Add_Order: cno, eno, and received. A call with valid parameters works fine, but a call with "bad data" text where a date was expected and so on does not trigger the exception handler.

Here is the output from SQL PLUS when the number 23 is entered where a date should be:
SQL> execute Process_Orders.Add_Order(12,14,'23');
BEGIN Process_Orders.Add_Order(12,14,'23'); END;

                                                         
ERROR at line 1:
ORA-01840: input value not long enough for date format
ORA-06512: at line 1
CREATE OR REPLACE PACKAGE Process_Orders AS
	PROCEDURE Add_Order(p_cno IN orders.cno%TYPE,
			p_eno IN orders.eno%TYPE,
			p_received IN DATE);
			p_creation_date DATE;
			p_last_update_date DATE;
			p_created_by VARCHAR2(10);
			p_last_update_by VARCHAR2(10);	
			p_date DATE;
			error_message VARCHAR2(100);
END Process_Orders;
/
show errors
set echo on
 
 
CREATE OR REPLACE PACKAGE BODY Process_Orders AS
  -- Add a new order for the specified class.
  -- Order_number_seq should be used to populate the order number (ONO) column.
 
 
	PROCEDURE Add_Order(p_cno IN orders.cno%TYPE,
			p_eno IN orders.eno%TYPE,
			p_received IN DATE) AS
 
	BEGIN
  	INSERT INTO orders (ono,cno,eno,received,creation_date,created_by,last_update_date,last_update_by)
  	SELECT Order_number_seq.NextVal,p_cno,p_eno,NVL(p_received,CURRENT_DATE),CURRENT_DATE,
	USER,CURRENT_DATE,USER FROM DUAL;
  	COMMIT;
 
 	EXCEPTION
	WHEN OTHERS THEN
	error_message := sqlerrm(sqlcode);
	DBMS_OUTPUT.PUT_LINE (error_message);
	INSERT INTO order_errors (ono,transaction_date,message) 
	VALUES (Order_number_seq.NextVal,CURRENT_DATE,error_message);
	COMMIT;
	END Add_Order;
 
END Process_Orders;
/
show errors

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k_smeeAsked:
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Guy Hengel [angelIII / a3]Connect With a Mentor Billing EngineerCommented:
the problem is that the error occurs even before you enter the procedure.
the value '23' cannot be converted to date, hence the error.

if you want the procedure to handle the error:

CREATE OR REPLACE PACKAGE Process_Orders AS
      PROCEDURE Add_Order(p_cno IN orders.cno%TYPE,
                  p_eno IN orders.eno%TYPE,
                  p_received IN VARCHAR2);

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k_smeeAuthor Commented:
Thank you so much!  I see what you mean. So  p_received was the issue here since it expected a date you changed it to VARCHAR2 os it would accept pretty much anything
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k_smeeAuthor Commented:
Thanks for the quick response! This assignment is killing me..
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