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TruncateLog Property (Backup)

Esse recurso será removido em uma versão futura do Microsoft SQL Server. Evite usar esse recurso em desenvolvimentos novos e planeje modificar os aplicativos que atualmente o utilizam.

The TruncateLog property controls log file processing for Backup and BulkCopy objects.

Sintaxe

object
.TruncateLog [= value]

Parts

  • object
    An expression that evaluates to an object in the Applies To list.

  • value
    A long integer that specifies a database log file operation as described in Settings.

Data Type

Long, enumerated

Modifiable

Read/write

Prototype (C/C++)

HRESULT GetTruncateLog(SQLDMO_BACKUP_LOG_TYPE* pRetVal)
HRESULT SetTruncateLog(SQLDMO_BACKUP_LOG_TYPE NewValue)

Settings

Constant

Value

Description

SQLDMOBackup_Log_NoLog

2

Records referencing committed transactions are removed. The transaction log is not backed up.

SQLDMOBackup_Log_NoOption

4

SQLDMOBackup_Log_Truncate.

SQLDMOBackup_Log_NoTruncate

1

The transaction log is backed up. Records referencing committed transactions are not removed, providing a point-in-time image of the log.

SQLDMOBackup_Log_Truncate

0

The transaction log is backed up. Records referencing committed transactions are removed.

SQLDMOBackup_Log_/Truncateonly

3

SQLDMOBackup_Log_NoLog.

Comentários

For Microsoft SQL Server, transaction log backup can perform two distinct database administration tasks:

  • Log backup can be part of a backup strategy allowing incremental recovery to a failure point.

  • Log backup can remove log records referencing committed transactions, freeing space in a log of fixed size or allowing an autoresizing log to shrink.

When using the Backup object to perform administrative maintenance of a database log, set the TruncateLog property to SQLDMOBackup_Log_Truncate or SQLDMOBackup_Log_NoLog.

Applies To: