Mass User Change

I would like to change all the users. Specifically, I would like to add the email address as a parameter. For one user at a time I can do this using ALTER USER. But for a mass user change, I decided I would need a complete procedure using the cursor. To that purpose I uploaded the user names and email addresses to a table I created: user_email.

CREATE PROCEDURE user_email()

LANGUAGE SQLSCRIPT AS

BEGIN

    DECLARE v_email   NVARCHAR(256) default '';

    DECLARE v_user    NVARCHAR(5000) default '';

    DECLARE CURSOR c_1  FOR

                   SELECT user, email FROM MYSCHEMA.USER_EMAIL;

    FOR cur_row AS c_1

               DO

        v_user = cur_row.user;

        ALTER USER v_user

                              SET PARAMETER

                              email address = cur_row.email;

    END FOR;

END;

Unfortunately, this does not work. I get a syntax error for the ALTER USER line  "USER is not supported".

This has left me baffeled. Any help will be much appreciated.

Cheers,

Martin