删除undo表空间报ORA-01548

但是现在undotbs表空间还有活动的回滚段，现在建立undo表空间undotbs2把undo表空间切换到undotbs2上去，ORA-01548: 已找到活动回

删除undo表空间报ORA-01548

用expdp导出数据报错:

C:\Documents and Settings\TEMP>expdp scott/tiger DUMPFILE=scott.dmp DIRECTORY=du

mp SCHEMAS=scott

Export: Release 11.2.0.1.0 - Production on 星期一 7月 23 21:58:14 2012

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

ORA-31626: 作业不存在

ORA-31637: 无法创建作业 SYS_EXPORT_SCHEMA_02 (用户 SCOTT)

ORA-06512: 在 "SYS.DBMS_SYS_ERROR", line 95

ORA-06512: 在 "SYS.KUPV$FT_INT", line 798

ORA-39244: 关系选择期间禁用删除空位图像标题的事件

ORA-06512: 在 "SYS.DBMS_SYS_ERROR", line 86

ORA-06512: 在 "SYS.KUPC$QUE_INT", line 1825

ORA-02320: 无法创建嵌套表列 TREAT("USER_DATA" AS "KUPC$_FILE_LIST")."FILELIST"

的存储表

ORA-00376: 此时无法读取文件 3

ORA-01110: 数据文件 3: 'D:\APP\WWANG\ORADATA\MDSP\UNDOTBS01.DBF'

导出报错如上错误：

由于之前删除undotbs1表空间数据文件undotbs01执行如下指令删除的

alter database datafile 'D:\app\wwang\oradata\mdsp\undotbs01.dbf' offline drop

但是现在undotbs表空间还有活动的回滚段

现在建立undo表空间undotbs2把undo表空间切换到undotbs2上去

SQL> create undo tablespace undotbs2 datafile 'D:\app\wwang\oradata\mdsp\undotbs

21.dbf' size 100M;

表空间已创建。

SQL> alter system set undo_tablespace='undotbs2';

系统已更改。

SQL>

Undo表空间切换过去后删除undotbs1，，报错如下

SQL> drop tablespace undotbs1 including contents;

drop tablespace undotbs1 including contents

第 1 行出现错误:

ORA-01548: 已找到活动回退段 '_SYSSMU1_1518548437$', 终止删除表空间

SQL>

再次导出还是报错上面的错误

这时查看

SQL>  select SEGMENT_NAME,TABLESPACE_NAME,STATUS from dba_rollback_segs;

 

SEGMENT_NAME                   TABLESPACE_NAME STATUS

------------------------------ --------------- -------------------------

SYSTEM                         SYSTEM          ONLINE

_SYSSMU13_967519202$           UNDOTBS1        OFFLINE

_SYSSMU12_1198886156$          UNDOTBS1        OFFLINE

_SYSSMU11_711815884$           UNDOTBS1        OFFLINE

_SYSSMU10_3176102001$          UNDOTBS1        NEEDS RECOVERY

_SYSSMU9_1126410412$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU8_1557854099$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU7_137577888$            UNDOTBS1        NEEDS RECOVERY

_SYSSMU6_1834113595$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU5_1018230376$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU4_2369290268$           UNDOTBS1        NEEDS RECOVERY

 

SEGMENT_NAME                   TABLESPACE_NAME STATUS

------------------------------ --------------- -------------------------

_SYSSMU3_991555123$            UNDOTBS1        NEEDS RECOVERY

_SYSSMU2_2082490410$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU1_1518548437$           UNDOTBS1        NEEDS RECOVERY

_SYSSMU16_3838319334$          UNDOTBS2        ONLINE

_SYSSMU15_3971806561$          UNDOTBS2        ONLINE

_SYSSMU14_168326844$           UNDOTBS2        ONLINE

已选择17行。

SQL>

发现undotbs01中的回滚段status为NEEDS RECOVERY 这时如果有rman备份可以利用rman恢复

现在没有备份，如下方法解决：

先利用spfile创建一个pfile文件然后把_CORRUPTED_ROLLBACK_SEGMENTS这个隐含参数加到里面

SQL> create pfile from spfile;

文件已创建。