Calling a Procedure with IN & OUT Parameters

Question

Hello,
I usually call my procedures using the following way
declare variable error_msg varchar2(50)
exec simple_msg('ABC,'ABC','ABC',:error_msg);
CREATE OR REPLACE PROCEDURE SIMPLE_MSG (
ID IN VARCHAR2,
URL IN VARCHAR2,
LIST IN VARCHAR2,
ERROR_MSG OUT VARCHAR2
Now my question is i am trying to call a proc which has IN OUT parameters. Can somebody guide me on how to call the proc. Thanks
CREATE OR REPLACE PROCEDURE SIMPLE_MSG (
ID IN VARCHAR2,
URL IN VARCHAR2,
LIST IN VARCHAR2,
NAME IN OUT VARCHAR,
ERROR_MSG OUT VARCHAR2

Answer 1

Hi,
IN OUT parameters are passed just like OUT paramenters: you must pass a variable.
If you need to set the IN OUT parameter before calling the procedure, then either
(a) use a separate EXEC command:
EXEC  :name := 'Original name';
EXEC  simple_msg ('ABC', 'ABC', 'ABC', :name, :error_msg);or
(b) use an anonymous PL/SQL block, like this:
BEGIN
    :name := 'Original name';
    simple_msg ('ABC', 'ABC', 'ABC', :name, :error_msg);
END;
/The parameter can be either a bind variable (as shown above), or a local variable (that can be used only in the block).