» SQL Server: Surefire Restore Method for Connection Hammered Databases

26Jul/110

SQL Server: Surefire Restore Method for Connection Hammered Databases

Recently, I had a database go into the dreaded SUSPECT mode after a failed byte-level replication. Once I brought it into EMERGENCY mode, an unknown, automated program immediately connected to it from several different servers.

Killing the connections and setting the db to single-user mode only created more headaches because this meant I couldn't be lazy and perform the RESTORE from SSMS; I'd keep receiving these errors: Exclusive access could not be obtained because the database is in use or The database is in single-user mode, and a user is currently connected to it.

I was determined, however. This is a battle I shall not lose! Ultimately, I ended up running the following code, which allowed for a successful restore:

DECLARE @dbname sysname

DECLARE @spid int

SET @dbname = 'myAppsDB'

SELECT @spid = min(spid) from master.dbo.sysprocesses where dbid = db_id(@dbname)


WHILE @spid IS NOT NULL

     BEGIN

          EXECUTE ('KILL ' + @spid)

          SELECT @spid = min(spid) from master.dbo.sysprocesses where dbid = db_id(@dbname) AND spid > @spid

     END

GO


ALTER DATABASE @dbname SET  SINGLE_USER WITH ROLLBACK IMMEDIATE

GO


RESTORE DATABASE @dbname FROM  DISK = N'D:\DBBackups\myAppsDB.BAK' WITH  FILE = 1,  NOUNLOAD,  REPLACE,  STATS = 10

GO

In ya face, automated program! And to the victor belong the spoils...