有時候給一些普通用戶授予查詢系統對象(例如dynamic performance views)許可權時會遇到“ORA-02030: can only select from fixed tables/views”,如下所示: SQL> grant select on v$session to test... ...
有時候給一些普通用戶授予查詢系統對象(例如dynamic performance views)許可權時會遇到“ORA-02030: can only select from fixed tables/views”,如下所示:
SQL> grant select on v$session to test;
grant select on v$session to test
*
ERROR at line 1:
ORA-02030: can only select from fixed tables/views
關於ORA-02030錯誤介紹如下,也是就是對於fixed tables 或fixed views只能進行SELECT查詢,不能做SELECT之外的任何操作
[oracle@DB-Server ~]$ oerr ora 2030
02030, 00000, "can only select from fixed tables/views"
// *Cause: An attempt is being made to perform an operation other than
// a retrieval from a fixed table/view.
// *Action: You may only select rows from fixed tables/views.
關於V$ Views的介紹如下:
V$ Views
The actual dynamic performance views are identified by the prefix V_$. Public synonyms for these views have the prefix V$. Database administrators and other users should access only the V$ objects, not the V_$ objects.
The dynamic performance views are used by Oracle Enterprise Manager, which is the primary interface for accessing information about system performance. After an instance is started, the V$ views that read from memory are accessible. Views that read data from disk require that the database be mounted, and some require that the database be open.
我們查詢發現V$SESSION,V$DBLINK都是fixed views,而且v$這類我們經常查的視圖都是v_$開頭視圖的同義詞。
SQL> SELECT * FROM V$FIXED_TABLE WHERE NAME IN( 'V$SESSION','V$DBLINK');
NAME OBJECT_ID TYPE TABLE_NUM
------------------------------ ---------- ----- ----------
V$SESSION 4294950919 VIEW 65537
V$DBLINK 4294951157 VIEW 65537
SQL>
SQL> COL OWNER FOR A12;
SQL> COL OBJECT_NAME FOR A32;
SQL> COL OBJECT_TYPE FOR A32;
SQL> SELECT OWNER, OBJECT_NAME ,OBJECT_TYPE
2 FROM DBA_OBJECTS
3 WHERE OBJECT_NAME='V$SESSION';
OWNER OBJECT_NAME OBJECT_TYPE
------------ -------------------------------- --------------------------------
PUBLIC V$SESSION SYNONYM
SQL>
SQL> COL TABLE_OWNER FOR A12;
SQL> COL SYNONYM_NAME FOR A20;
SQL> COL TABLE_NAME FOR A16;
SQL> COL DB_LINK FOR A8;
SQL> SELECT * FROM DBA_SYNONYMS WHERE SYNONYM_NAME='V$SESSION';
OWNER SYNONYM_NAME TABLE_OWNER TABLE_NAME DB_LINK
------------ -------------------- ------------ ---------------- --------
PUBLIC V$SESSION SYS V_$SESSION
所以要授權就應該執行下麵SQL語句
SQL>
SQL> GRANT SELECT ON V_$SESSION TO TEST;
Grant succeeded.
如果遇到這樣的錯誤,直接找到對應同義詞對應的視圖或基表,然後進行授權,如下所示:
SQL> show user;
USER is "SYS"
SQL> grant select on v$dblink to test;
grant select on v$dblink to test
*
ERROR at line 1:
ORA-02030: can only select from fixed tables/views
SQL> COL OWNER FOR A12;
SQL> COL OBJECT_NAME FOR A32;
SQL> COL OBJECT_TYPE FOR A32;
SQL> SELECT OWNER, OBJECT_NAME ,OBJECT_TYPE
2 FROM DBA_OBJECTS
3 WHERE OBJECT_NAME=UPPER('v$dblink');
OWNER OBJECT_NAME OBJECT_TYPE
------------ -------------------------------- --------------------------------
PUBLIC V$DBLINK SYNONYM
SQL> COL TABLE_OWNER FOR A12;
SQL> COL SYNONYM_NAME FOR A20;
SQL> COL TABLE_NAME FOR A16;
SQL> COL DB_LINK FOR A8;
SQL> SELECT * FROM DBA_SYNONYMS WHERE SYNONYM_NAME='V$DBLINK';
OWNER SYNONYM_NAME TABLE_OWNER TABLE_NAME DB_LINK
------------ -------------------- ------------ ---------------- --------
PUBLIC V$DBLINK SYS V_$DBLINK
SQL> grant select on v_$dblink to test;
Grant succeeded.
SQL>