Oracle10g Rename Tablespace

Another great new feature in tablespace management is rename tablespace.

Tablespace Rename Overview

In Oracle 10g, you can simply rename a tablespace TBS01 to TBS02 by issuing the following command:

ALTER TABLESPACE tbs01 RENAME TO tbs02;

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However, you must follow the rules when renaming a tablespace:

• You must set compatibility level to at least 10.0.1.
• You cannot rename the SYSTEM or SYSAUX tablespaces.
• You cannot rename an offline tablespace.
• You cannot rename a tablespace that contains offline datafiles.
• Renaming a tablespace does not changes its tablespace identifier.
• Renaming a tablespace does not change the name of its datafiles.

Tablespace Rename Benefits

Tablespace rename provides the following benefits:

• It simplifies the process of tablespace migration within a database.
• It simplifies the process of transporting a tablespace between two databases.

Examples

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

1. Create a new tablespace NEW_TBS.
2. Copy all objects from OLD_TBS to NEW_TBS.
3. Drop tablespace OLD_TBS.

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

ALTER TABLESPACE old_tbs RENAME TO new_tbs;

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

Oracle Tips by Burleson