DB : 11.2.0.3.0
1.将tablespace read only , 不允许再对表进行update、insert操作,测试dmp到另一个用户、表空间后是否可以update、insert
2.将table read only, 不允许再对表进行update、insert操作, 测试dmp表到另一个用户、表空间后是否可以update、insert
1.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/system01.dbf
/u01/app/oracle/oradata/orcl/sysaux01.dbf
/u01/app/oracle/oradata/orcl/undotbs01.dbf
/u01/app/oracle/oradata/orcl/users01.dbf
/u01/app/oracle/oradata/orcl/yoon01.dbf
SQL> create tablespace yoon datafile '/u01/app/oracle/oradata/orcl/yoon01.dbf' size 100m;
Tablespace created.
SQL> create user yoon identified by yoon default tablespace yoon ;
User created.
SQL> grant dba to yoon;
Grant succeeded.
SQL>show user
USER is "YOON"
SQL> create table yoon as select * from scott.emp;
Table created.
SQL> alter tablespace yoon read only;
Tablespace altered.
更新：
SQL> update yoon set empno=9999 where empno=7934;
update yoon set empno=9999 where empno=7934
*
ERROR at line 1:
ORA-00372: file 5 cannot be modified at this time
ORA-01110: data file 5: '/u01/app/oracle/oradata/orcl/yoon01.dbf'
插入：
SQL> insert into yoon select * from scott.emp;
insert into yoon select * from scott.emp
*
ERROR at line 1:
ORA-00372: file 5 cannot be modified at this time
ORA-01110: data file 5: '/u01/app/oracle/oradata/orcl/yoon01.dbf'
备份:
[oracle@db01 backup]$ expdp system/admin directory=data dumpfile=yoon.dmp logfile=yoon.log tables=yoon.yoon
Export: Release 11.2.0.3.0 - Production on Fri Oct 31 21:53:46 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_EXPORT_TABLE_01": system/******** directory=data dumpfile=yoon.dmp logfile=yoon.log tables=yoon.yoon
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 64 KB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . exported "YOON"."YOON" 8.570 KB 14 rows
Master table "SYSTEM"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded
******************************************************************************
Dump file set for SYSTEM.SYS_EXPORT_TABLE_01 is:
/u01/backup/yoon.dmp
Job "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at 21:54:02
[oracle@db01 backup]$ ls
yoon.dmp yoon.log
导入至scott用户：
[oracle@db01 backup]$ impdp system/admin directory=data dumpfile=yoon.dmp logfile=yoon_imp.log tables=yoon.yoon remap_schema=yoon:scott remap_tablespace=yoon:users
Import: Release 11.2.0.3.0 - Production on Fri Oct 31 21:55:43 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SYSTEM"."SYS_IMPORT_TABLE_01" successfully loaded/unloaded
Starting "SYSTEM"."SYS_IMPORT_TABLE_01": system/******** directory=data dumpfile=yoon.dmp logfile=yoon_imp.log tables=yoon.yoon remap_schema=yoon:scott remap_tablespace=yoon:users
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "SCOTT"."YOON" 8.570 KB 14 rows
Job "SYSTEM"."SYS_IMPORT_TABLE_01" successfully completed at 21:55:50
查看scott用户下表的状态：
SQL> select owner,table_name,TABLESPACE_NAME,STATUS,TABLE_LOCK,READ_ONLY from dba_tables where table_name='YOON' and owner='SCOTT';
OWNER TABLE_NAME TABLESPACE_NAME STATUS TABLE_LO REA
---------- --------------- ------------------------------ -------- -------- ---
SCOTT YOON USERS VALID ENABLED NO
SQL> update yoon set empno=9999 where empno=7934;
1 row updated.
SQL> insert into yoon select * from emp;
14 rows created.
SQL> commit;
将表空间read only后,将表迁移至另一个用户、表空间，可以进行update、insert操作。
2.
SQL> alter tablespace yoon read write;
Tablespace altered.
SQL> alter table yoon read only;
Table altered.
备份yoon表：
[oracle@db01 backup]$ expdp system/admin directory=data dumpfile=yoon.dmp logfile=yoon.log tables=yoon.yoon
******************************************************************************
Dump file set for SYSTEM.SYS_EXPORT_TABLE_01 is:
/u01/backup/yoon.dmp
Job "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at 22:03:29
导入yoon表至scott用户：
[oracle@db01 backup]$ impdp system/admin directory=data dumpfile=yoon.dmp logfile=yoon_imp.log tables=yoon.yoon remap_schema=yoon:scott remap_tablespace=yoon:users
Import: Release 11.2.0.3.0 - Production on Fri Oct 31 22:04:44 2014
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Master table "SYSTEM"."SYS_IMPORT_TABLE_01" successfully loaded/unloaded
Starting "SYSTEM"."SYS_IMPORT_TABLE_01": system/******** directory=data dumpfile=yoon.dmp logfile=yoon_imp.log tables=yoon.yoon remap_schema=yoon:scott remap_tablespace=yoon:users
Processing object type TABLE_EXPORT/TABLE/TABLE
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
. . imported "SCOTT"."YOON" 8.570 KB 14 rows
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Job "SYSTEM"."SYS_IMPORT_TABLE_01" successfully completed at 22:04:49
查看表的状态：
SQL> select owner,table_name,TABLESPACE_NAME,STATUS,TABLE_LOCK,READ_ONLY from dba_tables where table_name='YOON' and owner='SCOTT';
OWNER TABLE_NAME TABLESPACE STATUS TABLE_LO REA
---------- --------------- ---------- -------- -------- ---
SCOTT YOON USERS VALID ENABLED NO
SQL> update yoon set empno=9999 where empno=7934;
1 row updated.
SQL> insert into yoon select * from emp;
14 rows created.
SQL> commit;
将表设置read only,迁移至另一个用户、表空间后,可以进行update、insert操作 。