前提
1 开启归档模式
2 在线移动过程中，访问该数据文件中数据的业务会报错，其他业务不受影响
新建模拟的数据文件
SQL> select name from v$datafile;
NAME
/u01/app/oradata/test11g2/system01.dbf
/u01/app/oradata/test11g2/sysaux01.dbf
/u01/app/oradata/test11g2/undotbs01.dbf
/u01/app/oradata/test11g2/users01.dbf
SQL> alter tablespace users add datafile '/u01/app/oradata/users02.dbf' size 100m autoextend off;
Tablespace altered.
在新建的数据文件中填充数据
SQL> create table test.t100 tablespace users as select * from all_objects;
Table created.
SQL> insert into test.t100 select * from test.t100;
14679 rows created.
SQL> /
29358 rows created.
SQL> /
58716 rows created.
SQL> /
117432 rows created.
SQL> /
234864 rows created.
SQL> /
469728 rows created.
SQL> /
insert into test.t100 select * from test.t100
ERROR at line 1:
ORA-01653: unable to extend table TEST.T100 by 1024 in tablespace USERS
SQL> commit;
Commit complete.
SQL> select count(*) from test.t100;
COUNT(*)
939456
将数据文件Offline
SQL> select file_id,file_name,tablespace_name,status from dba_data_files;
FILE_ID FILE_NAME TABLESPACE_NAME STATUS
1 /u01/app/oradata/test11g2/system01.dbf SYSTEM AVAILABLE
2 /u01/app/oradata/test11g2/sysaux01.dbf SYSAUX AVAILABLE
3 /u01/app/oradata/test11g2/undotbs01.dbf UNDOTBS1 AVAILABLE
4 /u01/app/oradata/test11g2/users01.dbf USERS AVAILABLE
5 /u01/app/oradata/users02.dbf USERS AVAILABLE
SQL> alter database datafile '/u01/app/oradata/users02.dbf' offline;
Database altered.
SQL> connect test
Enter password:
Connected.
SQL> select table_name from user_tables;
TABLE_NAME
T100
OBJTEST
SQL> select count(*) from objtest;
COUNT(*)
15389
SQL> select count() from t100;
select count() from t100
*
ERROR at line 1:
ORA-00376: file 5 cannot be read at this time
ORA-01110: data file 5: '/u01/app/oradata/users02.dbf'
从操作系统移动该数据文件到预期位置
host:
cp -p /u01/app/oradata/users02.dbf /u01/app/oradata/test11g2/users02.dbf
数据库中更新数据文件位置
SQL> connect /as sysdba
Connected.
SQL> alter database rename file '/u01/app/oradata/users02.dbf' to '/u01/app/oradata/test11g2/users02.dbf';
Database altered.
SQL> select file_id,file_name,tablespace_name,status from dba_data_files;
FILE_ID FILE_NAME TABLESPACE_NAME STATUS
1 /u01/app/oradata/test11g2/system01.dbf SYSTEM AVAILABLE
2 /u01/app/oradata/test11g2/sysaux01.dbf SYSAUX AVAILABLE
3 /u01/app/oradata/test11g2/undotbs01.dbf UNDOTBS1 AVAILABLE
4 /u01/app/oradata/test11g2/users01.dbf USERS AVAILABLE
5 /u01/app/oradata/test11g2/users02.dbf USERS AVAILABLE
在线恢复该数据文件
SQL> recover datafile '/u01/app/oradata/test11g2/users02.dbf';
Media recovery complete.
将该数据文件Online
SQL> alter database datafile '/u01/app/oradata/test11g2/users02.dbf' online;
Database altered.
SQL> select count(*) from test.t100;
COUNT(*)
939456
SQL>
适用场景
1 开启归档模式
2 单机
3 RAC使用RMAN copy或者ASMCMD cp亦可
4 适用所有Oracle版本
参考文档
RAC: How to move a datafile that was added by mistake on local storage to shared location (Doc ID 1678747.1)