Bad Bind Variable? I'm trying to make a host variable!

Question

Okay, so I've declared a global variable:
VARIABLE g_total NUMBER
and I want to use this variable to hold the results of a stored procedure (I minimized my code to focus on the problem area):
CREATE OR REPLACE PROCEDURE my_procedure
(p_price IN m_movies.price%TYPE
p_quantity IN m_cart.quantity%TYPE)
IS
BEGIN
:g_total := p_price * p_quantity;
DBMS_OUTPUT.PUT_LINE('Order total is: '||:g_total);
END;
After all this, I get an error "bad bind variable g_total" for both lines I'm using it inside the procedure. What the heck is a bind variable? I'm using a host variable! (I think). Does this have anything to do with the fact that I can only assign a very generic NUMBER datatype to the host variable? Please help!

Answer 1

Hi,
Maybe the problem is in other place, because the code works fine (I commented column types because I don't have these tables):
Connected to Oracle Database 10g Express Edition Release 10.2.0.1.0
Connected as hr
SQL>
SQL> VARIABLE g_total NUMBER;
SQL> DECLARE
  2     PROCEDURE my_procedure(p_price    IN NUMBER /*m_movies.price%TYPE*/,
  3                            p_quantity IN NUMBER /*m_cart.quantity%TYPE */) IS
  4     BEGIN
  5        :g_total := p_price * p_quantity;
  6        DBMS_OUTPUT.PUT_LINE('Order total is: ' || :g_total);
  7     END;
  8  BEGIN
  9     my_procedure(p_price    => 2,
10                  p_quantity => 3);
11  END;
12  /
PL/SQL procedure successfully completed
g_total
6
SQL> Regards,