Oracle 11g修改數(shù)據(jù)庫用戶名

最近翻看某blog，發(fā)現(xiàn)原來Oracle 11g提供了用戶重命名的新特性，在10g環(huán)境下，如果想對用戶重命名，一般來說是先創(chuàng)建一個新的用戶并授權，然后將原用戶下的所有對象導入，然后刪除舊的用戶！下面來在11g rac環(huán)境下介紹下這個新特性！
一：創(chuàng)建一個測試用戶xxx,并寫入測試數(shù)據(jù)，由spfile文件生成pfile文件，關閉rac數(shù)據(jù)庫

[Oracle@node1 ~]$ sqlplus sys/Ab123456@rac5 as sysdba  SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 6 19:42:12 2012  Copyright (c) 1982, 2011, Oracle.  All rights reserved.   Connected to:  Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production  With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,  Data Mining and Real Application Testing options   SQL> create user xxx identified by 123456 default tablespace users;  User created.   SQL> grant resource,connect to xxx;  Grant succeeded.   SQL> create table xxx.test as select * from dba_objects;  Table created.   SQL> alter user xxx rename to yyy;  alter user xxx rename to yyy                 *  ERROR at line 1:  ORA-00922: missing or invalid option  SQL> alter user xxx rename to yyy identified by 123456;  alter user xxx rename to yyy identified by 123456                 *  ERROR at line 1:  ORA-00922: missing or invalid option  SQL> create pfile from spfile;  File created.   [Oracle@node1 ~]$ srvctl stop database -d rac -o immediate  [oracle@node1 ~]$ srvctl status database -d rac  Instance node1 is not running on node node1  Instance node2 is not running on node node2 二：修改pfile文件，添加隱含參數(shù) *._enable_rename_user='TRUE'，將數(shù)據(jù)庫以restrict方式啟動

[Oracle@node1 ~]$ cd /u01/app/oracle/product/11.2.0/db1/dbs/  [Oracle@node1 dbs]$ ls  hc_node1.dat  initnode1.ora  init.ora  orapwnode1   [Oracle@node1 dbs]$ tail -1 initnode1.ora   *._enable_rename_user='TRUE'  [Oracle@node1 dbs]$ sqlplus /nolog  SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 6 19:51:41 2012  Copyright (c) 1982, 2011, Oracle.  All rights reserved.   SQL> conn /as sysdba  Connected to an idle instance.  SQL> startup restrict pfile=$Oracle_HOME/dbs/initnode1.ora  ORACLE instance started.   Total System Global Area 1235959808 bytes  Fixed Size                  2227904 bytes  Variable Size             805306688 bytes  Database Buffers          419430400 bytes  Redo Buffers                8994816 bytes  Database mounted.  Database opened.  SQL> select open_mode,name from v$database;   OPEN_MODE            NAME -------------------- ---------------  READ WRITE           RAC   SQL> show parameter spfile;   NAME                                 TYPE        VALUE  ------------------------------------ ----------- ------------------------------  spfile                               string 三：修改xxx用戶名為yyy

SQL> alter user xxx rename to yyy;  alter user xxx rename to yyy                             *  ERROR at line 1:  ORA-02000: missing IDENTIFIED keyword   SQL> alter user xxx rename to yyy identified by 123456;  User altered.   SQL> select count(*) from yyy.test;     COUNT(*)  ----------       74556 四：使用spfile啟動rac

SQL> shutdown immediate;  Database closed.  Database dismounted.  Oracle instance shut down.   [Oracle@node1 dbs]$ srvctl start database -d rac   [oracle@node1 dbs]$ srvctl status database -d rac   Instance node1 is running on node node1  Instance node2 is running on node node2 五：連接測試，由此可見，對用戶的rename操作，可以繼承原有的權限

SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 6 20:00:52 2012  Copyright (c) 1982, 2011, Oracle.  All rights reserved.   Connected to:  Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production  With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,  Data Mining and Real Application Testing options   SQL> select * from tab;   TNAME                          TABTYPE  CLUSTERID  ------------------------------ ------- ----------  TEST                           TABLE  [Oracle@node1 ~]$ sqlplus xxx/123456@rac5  SQL*Plus: Release 11.2.0.3.0 Production on Tue Mar 6 20:01:22 2012  Copyright (c) 1982, 2011, Oracle.  All rights reserved.   ERROR:  ORA-01017: invalid username/password; logon denied
 

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