问题描述与分析：经常会有在建立表空间时，在数据文件命名时中间或结尾处多个空格，该如何将这名字里面的空格去掉呢，下面我们实验如何去掉。改名思路：将表空间offline，系统级rename，数据库级rename，表空间online，检查数据。
1. 创建测试表空间
sys@ORCL>create tablespace aaa datafile '/11g/app/oracle/oradata/ORCL/aaa bbb.dbf' size 10m;
Tablespace created.
2. 将表空间offline
sys@ORCL>alter tablespace aaa offline;
Tablespace altered.
3. 直接修改数据文件名字报错
sys@ORCL>alter database rename file '/11g/app/oracle/oradata/ORCL/aaa bbb.dbf' to '/11g/app/oracle/oradata/ORCL/aaabbb.dbf';
alter database rename file '/11g/app/oracle/oradata/ORCL/aaa bbb.dbf' to '/11g/app/oracle/oradata/ORCL/aaabbb.dbf'
*
ERROR at line 1:
ORA-01511: error in renaming log/data files
ORA-01141: error renaming data file 8 - new file '/11g/app/oracle/oradata/ORCL/aaabbb.dbf' not
found
ORA-01110: data file 8: '/11g/app/oracle/oradata/ORCL/aaa bbb.dbf'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
4. 修改操作系统级数据文件名字
[oracle@test ORCL]$ mv aaa\ bbb.dbf aaabbb.dbf
[oracle@test ORCL]$ ls
aaabbb.dbf? ? redo01.log? SYSAUX01.DBF? TEST.DBF? ? ? wmis01.dbf
control01.ctl? redo02.log? SYSTEM01.DBF? UNDOTBS01.DBF
EXAMPLE01.DBF? redo03.log? temptbs01.dbf? USERS01.DBF
5. 修改数据库级数据文件名字
sys@ORCL>alter database rename file '/11g/app/oracle/oradata/ORCL/aaa bbb.dbf' to '/11g/app/oracle/oradata/ORCL/aaabbb.dbf';
Database altered.
6. 将数据文件online
sys@ORCL>alter tablespace aaa online;
Tablespace altered.
sys@ORCL>select name from v$datafile where file#=8;
NAME
----------------------------------------------------------------------------------------------------
/11g/app/oracle/oradata/ORCL/aaabbb.dbf?
?
总结：此次测试主要是在系统级改名字与在数据库级改名字，谁在前谁在后问题。上面我举了错误顺序的例子和报错。生产库改前最好还是弄个备份，DBA的救命稻草，有备无患！?