Restore Object

Cette fonctionnalité sera supprimée dans une prochaine version de Microsoft SQL Server. Évitez d'utiliser cette fonctionnalité dans de nouveaux travaux de développement et prévoyez de modifier les applications qui utilisent actuellement cette fonctionnalité.

The Restore object defines the behavior of a RESTORE statement for a Microsoft SQL Server database or log.

Properties

Action Property (Restore)	MediaName Property
Database Property	PercentCompleteNotification Property
DatabaseFileGroups Property	RelocateFiles Property
DatabaseFiles Property	ReplaceDatabase Property
Devices Property	Restart Property
FileNumber Property	StandbyFiles Property
Files Property	Tapes Property
LastRestore Property	ToPointInTime Property
LoadHistory Property	UnloadTapeAfter Property

Methods

Abort Method	ReadMediaHeader Method (Restore)
GenerateSQL Method (Backup, Restore)	SQLRestore Method
ReadBackupHeader Method (Restore)	SQLVerify Method
ReadFileList Method

Events

Complete Event	PercentComplete Event
NextMedia Event

Notes

With the Restore object you can:

• Restore all or part of a database.

• Restore backup images of transaction log records.

• Verify the integrity of backup media.

• Report the contents of backup media.

• Monitor a restore operation, reporting status to the user.

SQL Server can write a backup to one of four media types: a disk, a tape, a named pipe, or a backup device. SQL Server supports backup striping. A striped backup is one directed to more than a single device. Striping is supported to a single media type only. That is, a backup can be written to two tape devices. A backup cannot be written half to a tape device and the other half to a disk.

At a minimum, supply values for a restore source when using the Restoreobject. SQL Distributed Management Objects (SQL-DMO) implements supported media types in the Restore object properties Files, Devices, Pipes, and Tapes. Use one media type property to specify the restore operation source.

Setting other properties in the Restore object may be required by the restore operation you want to use. For example, before using the SQLRestore method, you must set the Database property of the Restore object.

Notes

The Restore object is compatible with instances of SQL Server versions 7.0 and later. However, the Restore2 object extends the functionality of the Restore object for use with features that were introduced in SQL Server 2000.

To perform a complete database restore

1. Create a Restore object.

2. Set a media property, naming the source device or devices.

3. Set the Database property to indicate the target database.

4. If necessary, set the ReplaceDatabase property to force database creation.

5. Call the SQLRestore method.

To restore a single unit of a database log

1. Create a Restore object.

2. Set the Action property to SQLDMORestore_Log.

3. Set a media property, naming the source device or devices.

4. Set the Database property to indicate the target database.

5. Call the SQLRestore method.

To restore a database log chain

1. Create a Restore object.

2. Set the Action property to SQLDMORestore_Log.

3. Set the Database property to indicate the target database.

4. Set the LastRestore property to FALSE.

5. Set a media property, naming the source device or devices.

6. Call the SQLRestore method.

7. Repeat Steps 5 and 6 for all but the last unit in the database log chain.

8. Set the LastRestore property to TRUE.

9. Call the SQLRestore method to restore the last unit.

To verify the integrity of backup media

1. Create a Restore object.

2. Set a media property, naming the source device or devices.

3. Call the SQLVerify method.

Voir aussi

Référence

Restore2 Object