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フラッシュバック・ドロップ
フラッシュバック削除
Flashback Drop
Oracle Flashback Drop, which enables you to retrieve dropped database tables
Oracle Flashback Drop enables you to reverse the effects of dropping a table, returning the dropped table to the database along with dependent objects such as indexes and triggers. This feature stores dropped objects in a Recycle Bin, from which they can be retrieved until the Recycle Bin is purged, either explicitly or because space is needed.
Next: Recovering a Dropped Table with Oracle Flashback Drop
次のトピック: Oracleフラッシュバック・ドロップを使用した削除された表のリカバリ
As with Flashback Table, you can use Flashback Drop while the rest of your database remains open. Also, you can perform the flashback without undoing changes in objects not affected by the Flashback Drop operation. Flashback Table is more convenient than forms of media recovery that require taking the database offline and restoring files from backup.
For a table to be recoverable using Flashback Drop, it must reside in a locally managed tablespace. Also, you cannot recover tables in the SYSTEM tablespaces with Flashback Drop regardless of the tablespace type.
Flashback Drop lets you reverse the effects of dropping a table, returning the dropped table to the database along with its dependent objects such as indexes and triggers. Flashback Drop can be used while the rest of your database remains open, and without undoing wanted changes in objects not affected by the unwanted drop.
Oracle Enterprise Manager's flashback features provide a range of physical and logical data recovery tools as efficient, easy-to-use alternatives to physical and logical backups. Flashback table allows you to revert a table to its contents at a time in the recent past; and flashback drop allows you to rescue dropped database tables. Neither requires advance preparation such as creating logical-level exports to allow for retrieval of your lost data, and both can be used while your database is available.
Oracle Flashback Drop enables you to reverse the effects of dropping a table, returning the dropped table to the database along with its dependent objects such as indexes and triggers. This feature works by storing dropped objects in a Recycle Bin, from which they can be retrieved until the Recycle Bin is purged, either explicitly or because space is needed for new database objects.
Oracle Database's flashback features, such as Oracle Flashback Drop and Oracle Flashback Table, provide a range of physical and logical data recovery tools as efficient, easy-to-use alternatives to physical and logical backups. The flashback features enable you to reverse the effects of unwanted database changes without restoring datafiles from backup or performing media recovery.
You can use Oracle Enterprise Manager to reverse the effects of dropping a table by returning the dropped table and its dependent objects such as indexes and triggers to the database. Flashback Drop retrieves dropped objects that are stored in a recycle bin until such time as the recycle bin is purged.
Dropped objects are now moved to the recycle bin, where the space is only reused when it is needed. This allows 'undropping' a table using the FLASHBACK DROP Chapter 14 of the Oracle Database Administrators Guide.
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