Block a privs of roles that has been granted to another role

I don't think that I have which explains very well in the title...

create the role role_a;
Grant select, insert and update on the table to role_a;
Grant select, insert, update the table to role_a b;
Grant select, insert, update the table to role_a c;

create the role role_b;
grant role_a to role_b;
revoke the insertion, update table b of role_b;

What I have to do is revoke the insertion, update role_b.
This example is simple, but I hope you get the gist of the problem.

I believe that the suggestion that would be rather than to revoke the privileges of role_b, you must create a new role_c role, and then grant privileges on tables & c to c role.

You cannot revoke the privileges to a role that are not directly granted to the role. If you can not role_b have a subset of the privileges granted to role_a by granting the role and removal of individual privileges. You must create a new role (role_c) which includes the subset of privileges you want and grant this new role_c to role_b. You can also, of course, just grant the privileges on tables role_b has & c directly rather than role_a.

Justin

Tags: Database

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