User that can see different schemas

Question

Dear Gurus,
In my db I've 2 schemas with 2 different user each one....so:
Schema A with user A_user
Schema B with user B_user
Now I created a new user's schema.
Schema C with user C_user
I need to allow C_User to see schema A and Schema B in read Only.
How can I do it?
Please let me know
regards

Answer 1

Hi,
You've got the basic idea.
Remember that names in quotes are case-sensitive. You probably need:
    FOR r IN (SELECT OWNER, TABLE_NAME FROM ALL_TABLES WHERE owner='A_USER')  -- Not ... 'A_User'This assumes SYSTEM has the necessary privileges to grant privileges on a_user's tables. If that's not the case, you can have SYSTEM create the role, but have a_user grant the privilleges to the role.
Where I work, typically, a DBA creates the role, then grants it to the owner WITH ADMIN OPTION
GRANT  a_readonly  TO  a_user  WITH ADMIN OPTION;Of course, a_user doesn't need the role to see the tables, but this gives a_user the ability to grant the role (or revoke it from) other users without getting the DBA involved. A_user then does steps (2) and (3).
A small thing: I would call the role A_ReadOnly, or something with A in the name, not C.
The important thing about the role is that it allows grantees to see A's tables.
The fact that the role was made for C_User is not so important. The role will remain essentially the same if other users get the role, or C_User is dropped.
Edited by: Frank Kulash on Jun 3, 2009 11:45 AM