DROP ROLLBACK SEGMENT

Syntax

Purpose

To remove a rollback segment from the database. When you drop a rollback segment, all space allocated to the rollback segment returns to the tablespace.

For information on creating a rollback segment, see CREATE ROLLBACK SEGMENT. See also "CREATE TABLESPACE".

Prerequisites

You must have the DROP ROLLBACK SEGMENT system privilege.

Keywords and Parameters

rollback_segment

is the name the rollback segment to be dropped. Restrictions: You can drop a rollback segment only if it is offline. To determine whether a rollback segment is offline, query the data dictionary view DBA_ROLLBACK_SEGS. Offline rollback segments have the value AVAILABLE in the STATUS column. You can take a rollback segment offline with the OFFLINE clause of the ALTER ROLLBACK SEGMENT statement. You cannot drop the SYSTEM rollback segment.

Example

The following statement drops the rollback segment ACCOUNTING:

DROP ROLLBACK SEGMENT accounting;