请高手看看下面的几段什么意思，组合在一起有什么功能 谢谢！！！！！！！！！！
Use MasterGo
sp_configure 'allow updates', 1
reconfigure with override
Go
begin tran
update sysdatabases set status = 32768 where name = 'W'
commit tran
DBCC TRACEON(3604)
DBCC REBUILD_LOG('W','F:\Database\MSSQL\Log\W_Log.ldf')
Go
use master
update sysdatabases set status = 8 where name = 'W'
Go
sp_configure 'allow updates', 0
reconfigure with override
Go
