oracle 表迁移方法 （二） 约束不失效
DB：11.2.0.3.0
在oracle 表迁移方法 （一）中,只是move了一张普通的表,如果表的字段带有主键约束呢 ？
[oracle@db01 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Mon Nov 3 18:40:16 2014
Copyright (c) 1982, 2011, Oracle. 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
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/system01.dbf
/u01/app/oracle/oradata/orcl/sysaux01.dbf
/u01/app/oracle/oradata/orcl/undotbs01.dbf
/u01/app/oracle/oradata/orcl/users01.dbf
创建dahao表空间
SQL> create tablespace dahao datafile '/u01/app/oracle/oradata/orcl/dahao01.dbf' size 100m;
Tablespace created.
创建yoon用户
SQL> create user yoon identified by yoon default tablespace dahao;
User created.
授权
SQL> grant dba to yoon;
Grant succeeded.
当前用户
SQL> show user
USER is "YOON"
创建测试表yoon
SQL> create table yoon as select * from scott.emp;
Table created.
查看当前表索引
SQL> select index_name from user_indexes;
no rows selected
创建empno主键约束
SQL> alter table yoon add constraint pk_empno primary key (empno);
Table altered.
SQL> conn / as sysdba
Connected.
SQL> select name from v$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/dahao01.dbf
创建yoon表空间
SQL> create tablespace yoon datafile '/u01/app/oracle/oradata/orcl/yoon01.dbf' size 100m;
Tablespace created.
SQL> conn yoon/yoon;
Connected.
创建索引
SQL> create index idx_deptno on yoon(deptno);
Index created.
设置yoon表为只读
SQL> alter table yoon.yoon read only;
Table altered.
迁移yoon表
SQL> alter table yoon.yoon move tablespace yoon;
Table altered.
修改用户默认表空间
SQL> alter user yoon default tablespace yoon;
User altered.
查看用户对应默认表空间
SQL> select username,default_tablespace from dba_users;
USERNAME DEFAULT_TABLESPACE
------------------------------ ------------------------------
SYS SYSTEM
SYSTEM SYSTEM
SCOTT USERS
GGS USERS
YOON YOON
查看索引状态
SQL> select INDEX_NAME,TABLE_OWNER,TABLE_NAME,STATUS from user_indexes where index_name='PK_EMPNO' ;
INDEX_NAME TABLE_OWNER TABLE_NAME STATUS
------------------------------ ------------------------------ ------------------------------ --------
PK_EMPNO YOON YOON UNUSABLE
SQL> select INDEX_NAME,TABLE_OWNER,TABLE_NAME,STATUS from user_indexes where index_name='IDX_DEPTNO' ;
INDEX_NAME TABLE_OWNER TABLE_NAME STATUS
------------------------------ ------------------------------ ------------------------------ --------
IDX_DEPTNO YOON YOON UNUSABLE
重建索引
SQL> alter index IDX_DEPTNO rebuild ;
Index altered.
SQL> select INDEX_NAME,TABLE_OWNER,TABLE_NAME,STATUS from user_indexes where index_name='PK_EMPNO' ;
INDEX_NAME TABLE_OWNER TABLE_NAME STATUS
------------------------------ ------------------------------ ------------------------------ --------
PK_EMPNO YOON YOON UNUSABLE
SQL> select INDEX_NAME,TABLE_OWNER,TABLE_NAME,STATUS from user_indexes where index_name='IDX_DEPTNO' ;
INDEX_NAME TABLE_OWNER TABLE_NAME STATUS
------------------------------ ------------------------------ ------------------------------ --------
IDX_DEPTNO YOON YOON VALID
设置yoon表为读写
SQL> alter table yoon read write;
Table altered.
插入数据
SQL> insert into yoon (empno) values (7934);
insert into yoon (empno) values (7934)
*
ERROR at line 1:
ORA-01502: index 'YOON.PK_EMPNO' or partition of such index is in unusable state
重建索引
SQL> alter index PK_EMPNO rebuild;
Index altered.
SQL> insert into yoon (empno) values (7934);
insert into yoon (empno) values (7934)
*
ERROR at line 1:
ORA-00001: unique constraint (YOON.PK_EMPNO) violated
经上述测试发现,通过move迁移表至另一个表空间,索引失效,主键约束不失效.