删除Oracle数据文件/临时文件

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标题:删除Oracle数据文件/临时文件

作者:惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

有些时候,想删除一个数据文件(临时文件),在10g之前的版本,要删除一个数据文件,必须删除该数据文件所属的表空间(特殊处理方法除外)。不太懂数据库的朋友直接os级别删除数据文件,导致数据库不能正常启动;稍微等点数据库的朋友,会先offline数据文件,然后os级别删除,但是这条数据文件的记录还保留在数据字典中,不爽(特殊处理办法见:清除离线数据文件记录)。在10g及其以后版本中,oracle提供了alter tablespace talbespace_name drop datafile/tempfile path/file_id进行删除某个数据文件

一、删除数据文件

[oracle@ECP-UC-DB1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Thu Dec 8 11:22:38 2011

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> col tablespace_name for a20
SQL> col file_name for a50
SQL> set line 120
SQL> select file_id,file_name,tablespace_name 
   2 from dba_data_files order by tablespace_name;

   FILE_ID FILE_NAME                                          TABLESPACE_NAME
---------- -------------------------------------------------- --------------------
         9 /opt/oracle/oradata/test/odu01.dbf                 ODU
        10 /opt/oracle/oradata/test/odu03.dbf                 ODU
         8 /opt/oracle/oradata/test/odu02.dbf                 ODU
         3 /opt/oracle/oradata/test/sysaux01.dbf              SYSAUX
         1 /opt/oracle/oradata/test/system01.dbf              SYSTEM
         2 /opt/oracle/oradata/test/undotbs01.dbf             UNDOTBS1
         5 /opt/oracle/oradata/test/user32g.dbf               USERS
         7 /opt/oracle/oradata/test/user02.dbf                USERS
         4 /opt/oracle/oradata/test/users01.dbf               USERS
         6 /opt/oracle/oradata/test/xifenfei01.dbf            XFF
        11 /opt/oracle/oradata/test/xifenfei03.dbf            XFF

11 rows selected.

SQL> !ls -l /opt/oracle/oradata/test/*.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  8 00:05 /opt/oracle/oradata/test/odu01.dbf
-rw-r----- 1 oracle oinstall 11282685952 Dec  8 00:05 /opt/oracle/oradata/test/odu02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/odu03.dbf
-rw-r----- 1 oracle oinstall   387981312 Dec  8 12:36 /opt/oracle/oradata/test/sysaux01.dbf
-rw-r----- 1 oracle oinstall   534781952 Dec  8 12:45 /opt/oracle/oradata/test/system01.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  7 22:01 /opt/oracle/oradata/test/temp01.dbf
-rw-r----- 1 oracle oinstall  1289756672 Dec  8 12:45 /opt/oracle/oradata/test/undotbs01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/user02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/user32g.dbf
-rw-r----- 1 oracle oinstall     5251072 Dec  8 00:05 /opt/oracle/oradata/test/users01.dbf
-rw-r----- 1 oracle oinstall    20979712 Dec  8 00:05 /opt/oracle/oradata/test/xifenfei01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/xifenfei03.dbf

SQL> alter tablespace xff drop datafile 11;
alter tablespace xff drop datafile 11
*
ERROR at line 1:
ORA-03262: the file is non-empty

SQL> col segment_name for a20
SQL> select owner,SEGMENT_NAME,FILE_ID,BLOCKS from dba_extents
  2  where file_id=11;

OWNER                          SEGMENT_NAME            FILE_ID     BLOCKS
------------------------------ -------------------- ---------- ----------
CHF                            XFF_TEST                     11          8
CHF                            XFF_TEST                     11        128
CHF                            XFF_TEST                     11        128
CHF                            T_XFF                        11        128
CHF                            T_XFF                        11        128

SQL> alter table chf.xff_test move tablespace users;

Table altered.

SQL> alter table chf.t_xff move tablespace users;

Table altered.

SQL> select owner,SEGMENT_NAME,FILE_ID,BLOCKS from dba_extents
  2  where file_id=11;

no rows selected

SQL> alter tablespace xff drop datafile 11;

Tablespace altered.

SQL> select file_id,file_name,tablespace_name 
  2  from dba_data_files order by tablespace_name;

   FILE_ID FILE_NAME                                          TABLESPACE_NAME
---------- -------------------------------------------------- --------------------
         9 /opt/oracle/oradata/test/odu01.dbf                 ODU
        10 /opt/oracle/oradata/test/odu03.dbf                 ODU
         8 /opt/oracle/oradata/test/odu02.dbf                 ODU
         3 /opt/oracle/oradata/test/sysaux01.dbf              SYSAUX
         1 /opt/oracle/oradata/test/system01.dbf              SYSTEM
         2 /opt/oracle/oradata/test/undotbs01.dbf             UNDOTBS1
         4 /opt/oracle/oradata/test/users01.dbf               USERS
         7 /opt/oracle/oradata/test/user02.dbf                USERS
         5 /opt/oracle/oradata/test/user32g.dbf               USERS
         6 /opt/oracle/oradata/test/xifenfei01.dbf            XFF

10 rows selected.

SQL> !ls -l /opt/oracle/oradata/test/*.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  8 00:05 /opt/oracle/oradata/test/odu01.dbf
-rw-r----- 1 oracle oinstall 11282685952 Dec  8 00:05 /opt/oracle/oradata/test/odu02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/odu03.dbf
-rw-r----- 1 oracle oinstall   387981312 Dec  8 12:36 /opt/oracle/oradata/test/sysaux01.dbf
-rw-r----- 1 oracle oinstall   534781952 Dec  8 12:45 /opt/oracle/oradata/test/system01.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  7 22:01 /opt/oracle/oradata/test/temp01.dbf
-rw-r----- 1 oracle oinstall  1289756672 Dec  8 12:45 /opt/oracle/oradata/test/undotbs01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:52 /opt/oracle/oradata/test/user02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:52 /opt/oracle/oradata/test/user32g.dbf
-rw-r----- 1 oracle oinstall     5251072 Dec  8 12:52 /opt/oracle/oradata/test/users01.dbf
-rw-r----- 1 oracle oinstall    20979712 Dec  8 12:52 /opt/oracle/oradata/test/xifenfei01.dbf

二、删除临时表空间文件

SQL> alter  tablespace temp add tempfile '/opt/oracle/oradata/test/xff_temp02.dbf' size 10m;

Tablespace altered.

SQL> select file_id,file_name,tablespace_name from dba_temp_files;

   FILE_ID FILE_NAME                                          TABLESPACE_NAME
---------- -------------------------------------------------- --------------------
         2 /opt/oracle/oradata/test/xff_temp02.dbf            TEMP
         1 /opt/oracle/oradata/test/temp01.dbf                TEMP

SQL> !ls -l /opt/oracle/oradata/test/*.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  8 00:05 /opt/oracle/oradata/test/odu01.dbf
-rw-r----- 1 oracle oinstall 11282685952 Dec  8 00:05 /opt/oracle/oradata/test/odu02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/odu03.dbf
-rw-r----- 1 oracle oinstall   387981312 Dec  8 13:00 /opt/oracle/oradata/test/sysaux01.dbf
-rw-r----- 1 oracle oinstall   534781952 Dec  8 12:58 /opt/oracle/oradata/test/system01.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  7 22:01 /opt/oracle/oradata/test/temp01.dbf
-rw-r----- 1 oracle oinstall  1289756672 Dec  8 12:57 /opt/oracle/oradata/test/undotbs01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:57 /opt/oracle/oradata/test/user02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:57 /opt/oracle/oradata/test/user32g.dbf
-rw-r----- 1 oracle oinstall     5251072 Dec  8 12:57 /opt/oracle/oradata/test/users01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 13:00 /opt/oracle/oradata/test/xff_temp02.dbf
-rw-r----- 1 oracle oinstall    20979712 Dec  8 12:57 /opt/oracle/oradata/test/xifenfei01.dbf

SQL> alter tablespace temp drop tempfile 2;

Tablespace altered.

SQL> !ls -l /opt/oracle/oradata/test/*.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  8 00:05 /opt/oracle/oradata/test/odu01.dbf
-rw-r----- 1 oracle oinstall 11282685952 Dec  8 00:05 /opt/oracle/oradata/test/odu02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 00:05 /opt/oracle/oradata/test/odu03.dbf
-rw-r----- 1 oracle oinstall   387981312 Dec  8 13:00 /opt/oracle/oradata/test/sysaux01.dbf
-rw-r----- 1 oracle oinstall   534781952 Dec  8 12:58 /opt/oracle/oradata/test/system01.dbf
-rw-r----- 1 oracle oinstall   104865792 Dec  7 22:01 /opt/oracle/oradata/test/temp01.dbf
-rw-r----- 1 oracle oinstall  1289756672 Dec  8 12:57 /opt/oracle/oradata/test/undotbs01.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:57 /opt/oracle/oradata/test/user02.dbf
-rw-r----- 1 oracle oinstall    10493952 Dec  8 12:57 /opt/oracle/oradata/test/user32g.dbf
-rw-r----- 1 oracle oinstall     5251072 Dec  8 12:57 /opt/oracle/oradata/test/users01.dbf
-rw-r----- 1 oracle oinstall    20979712 Dec  8 12:57 /opt/oracle/oradata/test/xifenfei01.dbf

三、注意事项
1、Oracle Database 10g Release 2及其以上版本
2、删除数据文件从数据库和系统
3、数据文件必须为空
4、数据文件不是对应表空间的最后一个
5、不能删除只读表空间中数据文件
6、不能删除system中数据文件
7、不能删除本地管理的offline表空间数据文件

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