Tablespace_Rename表空间

A.1 重命名空间命令

TablespaceRename Overview

In Oracle 10g, you can simply rename a tablespace TBS01 to TBS02by issuing the following command:

ALTER TABLESPACE tbs01 RENAME TO tbs02;

A.2 重命名空间限制

However, you must follow the rules whenrenaming a tablespace:

1)       You must set compatibility level to at least 10.0.1.

2)       You cannot rename the SYSTEM or SYSAUXtablespaces.

3)       You cannot rename an offline tablespace.

4)       You cannot rename a tablespace that containsoffline datafiles.

5)       Renaming a tablespace does not changes itstablespace identifier.

6)       Renaming a tablespace does not change the nameof its datafiles.

A.3 重命名空间使用场景

Tablespace Rename Benefits

Tablespace rename provides the followingbenefits:

1)       It simplifies the process of tablespacemigration within a database.

2)       It simplifies the process of transporting atablespace between two databases.

Examples

Example 1: Rename a tablespace within adatabase. In Oracle9i or earlier releases, you must take the following steps torename a tablespace from OLD_TBS to NEW_TBS:

Create a new tablespace NEW_TBS.

Copy all objects from OLD_TBS to NEW_TBS.

Drop tablespace OLD_TBS.

In Oracle 10g, you can accomplish the same thing in one step andrename tablespace OLD_TBS to NEW_TBS.

ALTER TABLESPACE old_tbs RENAME TO new_tbs;

Example 2: Transport a tablespace betweentwo databases. In the following example (see figure 3.2), you cannot transporta tablespace TBS01 from database A to database B in the previous release ofOracle server because database B also has a tablespace called TBS01. In Oracle 10g, you can simply rename TBS01 to TBS02 in database B before transportingtablespace TBS01.