1. 系統權限unlimited tablespace是隱含在dba, resource角色中的一個系統權限. 當用戶得到dba或resource的角色時, unlimited tablespace系統權限也隱式受權給用戶.
2. 系統權限unlimited tablespace不能被授予role, 可以被授予用戶.
3. 系統權限unlimited tablespace不會隨着resource, dba被授予role而授予給用戶.
1 實驗1
SQL> create user u1 identified by u1;
User created.
SQL> grant connect, resource to u1;
Grant succeeded.
SQL> select * from dba_role_privs a where a.grantee='U1';
GRANTEE GRANTED_ROLE ADM DEF
-------------------- -------------------- --- ---
U1 RESOURCE NO YES
U1 CONNECT NO YES
SQL> select * from dba_sys_privs a where a.grantee='U1';
GRANTEE PRIVILEGE ADM
-------------------- -------------------- ---
U1 UNLIMITED TABLESPACE NO
SQL> revoke unlimited tablespace from u1;
Revoke succeeded.
SQL> select * from dba_sys_privs a where a.grantee='U1';
no rows selected
2 實驗2
SQL> create role r1;
Role created.
SQL> grant unlimited tablespace to r1;
ORA-01931: cannot grant UNLIMITED TABLESPACE to a role
不能受權給角色r1.
SQL> grant unlimited tablespace to u1;
Grant succeeded.
可以受權給用戶u1.
3 實驗3
SQL> revoke resource from u1;
Revoke succeeded.
SQL> grant resource to r1;
Grant succeeded.
SQL> grant r1 to u1;
Grant succeeded.
SQL> select * from dba_role_privs a where a.grantee='U1';
GRANTEE GRANTED_ROLE ADM DEF
-------------------- -------------------- --- ---
U1 R1 NO YES
U1 CONNECT NO YES
SQL> select * from dba_sys_privs a where a.grantee='U1';
no rows selected
系統權限中沒有unlimit tablespace系統權限.