重命名sys用户引起数据库启动报ORA-01092 ORA-00600 kokasgi1错误

有客户和我反馈,他们为了防止有人使用sys用户进行登录,对sys用户进行了重命名,具体操作语句为:

update user$ set name='THISISSYS' where user#=0;

然后重启数据库发现数据库无法正常启动,报ORA-01092 ORA-00600 kokasgi1错误

[oracle@ecs-d75e-0618923 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 7 14:40:28 2020

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00600: internal error code, arguments: [kokasgi1], [], [], [], [], [], [],[], [], [], [], []
Process ID: 6269
Session ID: 530 Serial number: 3

以前写过处理过类似问题,参见:ORA-600 kokasgi1故障恢复,通过特殊处理,数据库open之后,对其user#=0的用户修改为SYS.

[oracle@ecs-d75e-0618923 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 7 14:52:09 2020

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
SQL> alter database open;

Database altered.

SQL> select name from user$ where user#=0;

NAME
------------------------------
THISISSYS

SQL> update user$ set name='SYS' where user#=0;

1 row updated.

SQL> commit;

Commit complete.

SQL> shutdown abort;
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

Total System Global Area 6881345536 bytes
Fixed Size                  2214056 bytes
Variable Size            4227860312 bytes
Database Buffers         2617245696 bytes
Redo Buffers               34025472 bytes
Database mounted.
Database altered.

至此恢复完成,再次sys是oracle内部默认的超级用户,系统很多调用在程序中写死的sys.,对其用户不能进行重命名操作.