Oracle roles and privileges

The following very useful scripts are taken out from http://www.adp-gmbh.ch/ora/misc/recursively_list_privilege.html (thanks to René Nyffenegger) Users to roles and system privileges This is a script that shows the hierarchical relationship between system privileges, roles and users.

select
  lpad(' ', 2*level) || granted_role "User, his roles and privileges"
from
  (
  /* THE USERS */
    select 
      null     grantee, 
      username granted_role
    from 
      dba_users
    where
      username like upper('%&enter_username%')
  /* THE ROLES TO ROLES RELATIONS */ 
  union
    select 
      grantee,
      granted_role
    from
      dba_role_privs
  /* THE ROLES TO PRIVILEGE RELATIONS */ 
  union
    select
      grantee,
      privilege
    from
      dba_sys_privs
  )
start with grantee is null
connect by grantee = prior granted_role;

System privileges to roles and users This is also possible the other way round: showing the system privileges in relation to roles that have been granted this privilege and users that have been granted either this privilege or a role:

select
  lpad(' ', 2*level) || c "Privilege, Roles and Users"
from
  (
  /* THE PRIVILEGES */
    select 
      null   p, 
      name   c
    from 
      system_privilege_map
    where
      name like upper('%&enter_privliege%')
  /* THE ROLES TO ROLES RELATIONS */ 
  union
    select 
      granted_role  p,
      grantee       c
    from
      dba_role_privs
  /* THE ROLES TO PRIVILEGE RELATIONS */ 
  union
    select
      privilege     p,
      grantee       c
    from
      dba_sys_privs
  )
start with p is null
connect by p = prior c;