select any dictionary与select_catalog_role区别

select any dictionary与select_catalog_role

相同之处，有了这两个中的一个，基本就可以查询数据字典

不同之处：

1、select any dictionary是一种系统权限（system privilege），而select_catalog_role 是一种角色（a role）。

2、角色的话需要重新登录或者显式的set role 来生效，而赋予系统权限是立即生效的。（P.S. 同样revoke权限也是立即生效）

3、select_catalog_role可以查看一些数据字典的视图·(可以看role的定义)，如dba_之类的，而select any dictionary可以查看sys的表，select_catalog_role看不到。

下面具体验证一下：

2、角色的话需要重新登录或者显式的set role 来生效，而赋予系统权限是立即生效的。（P.S. 同样revoke权限也是立即生效）

select any dictionary立即生效

sys@TEST0924> desc dba_role_privs
 Name                                                  Null?    Type
 ----------------------------------------------------- -------- ------------------------------------
 GRANTEE                                                        VARCHAR2(30)
 GRANTED_ROLE                                          NOT NULL VARCHAR2(30)
 ADMIN_OPTION                                                   VARCHAR2(3)
 DEFAULT_ROLE                                                   VARCHAR2(3)

同时开两个会话，查看情况。从上至下，按顺序。

sys@TEST0924> select * from dba_role_privs where grantee='TEST'; GRANTEE                        GRANTED_ROLE                   ADM DEF ------------------------------ ------------------------------ --- --- TEST                           RESOURCE                       NO  YES TEST                           CONNECT                        NO  YES 1、此时test用户只有resource和connect权限。
	test@TEST0924> select file_id,file_name,tablespace_name from dba_data_files; select file_id,file_name,tablespace_name from dba_data_files                                               * ERROR at line 1: ORA-00942: table or view does not exist   2、此时test用户无法访问到dba_data_files这个数据字典
sys@TEST0924> grant select any dictionary to test; Grant succeeded. 3、将select any dictionary这个权限给test用户
	test@TEST0924> select file_id,file_name,tablespace_name from dba_data_files;    FILE_ID FILE_NAME                                          TABLESPACE_NAME ---------- -------------------------------------------------- ------------------------------          4 +DATA/test0924/datafile/users.260.829650045        USERS          3 +DATA/test0924/datafile/inventory.266.829658135    INVENTORY          2 /u01/app/oracle/oradata/test0924/sysaux01.dbf      SYSAUX          1 /u01/app/oracle/oradata/test0924/system01.dbf      SYSTEM          5 /u01/app/oracle/oradata/test0924/example01.dbf     EXAMPLE          6 +DATA/test0924/datafile/inventory03.dbf            INVENTORY          8 /u01/app/oracle/oradata/test0924/undotbs02.dbf     UNDOTBS2          9 /u01/app/oracle/oradata/test0924/undotbs01.dbf     UNDOTBS1         10 /u01/app/oracle/oradata/test0924/inventory01.dbf   INVENTORY 9 rows selected. 4、立即生效，可以查看到dba_data_files这个数据字典里面的内容
sys@TEST0924> revoke select any dictionary from test; Revoke succeeded. 5、回收select any dictionary权限
	test@TEST0924> select file_id,file_name,tablespace_name from dba_data_files; select file_id,file_name,tablespace_name from dba_data_files                                               * ERROR at line 1: ORA-00942: table or view does not exist 6、立即生效，已经无法查看到dba_data_files这个数据字典里面的内容

 

select_catalog_role 无法立即生效

sys@TEST0924> grant select_catalog_role to test; Grant succeeded. 1、授予test用户select_catalog_role角色

test@TEST0924> select file_id,file_name,tablespace_name from dba_data_files; select file_id,file_name,tablespace_name from dba_data_files                                               * ERROR at line 1: ORA-00942: table or view does not exist 2、test用户无法访问 test@TEST0924> SELECT * FROM USER_ROLE_PRIVS; USERNAME                       GRANTED_ROLE                   ADM DEF OS_ ------------------------------ ------------------------------ --- --- --- TEST                           CONNECT                        NO  YES NO TEST                           RESOURCE                       NO  YES NO TEST                           SELECT_CATALOG_ROLE            NO  YES NO 3、即使他的SELECT_CATALOG_ROLE为yes也不能查询到。 test@TEST0924> set role SELECT_CATALOG_ROLE; Role set. test@TEST0924> select file_id,file_name,tablespace_name from dba_data_files;    FILE_ID FILE_NAME                                          TABLESPACE_NAME ---------- -------------------------------------------------- ------------------------------          4 +DATA/test0924/datafile/users.260.829650045        USERS          3 +DATA/test0924/datafile/inventory.266.829658135    INVENTORY          2 /u01/app/oracle/oradata/test0924/sysaux01.dbf      SYSAUX          1 /u01/app/oracle/oradata/test0924/system01.dbf      SYSTEM          5 /u01/app/oracle/oradata/test0924/example01.dbf     EXAMPLE          6 +DATA/test0924/datafile/inventory03.dbf            INVENTORY          8 /u01/app/oracle/oradata/test0924/undotbs02.dbf     UNDOTBS2          9 /u01/app/oracle/oradata/test0924/undotbs01.dbf     UNDOTBS1         10 /u01/app/oracle/oradata/test0924/inventory01.dbf   INVENTORY 9 rows selected. 4、必须使用set role，才能及时生效。