AllowOverwrite Element (XMLA)
SQL Server 2012
Determines whether the parent Backup or Restore command attempts to overwrite the target file or database.
For Backup commands, the AllowOverwrite element determines whether the command can overwrite the backup file specified in the File element.
For Restore elements, the AllowOverwrite element determines whether the command can overwrite the Microsoft SQL Server Analysis Services database specified in the DatabaseName element.
