Auto generate SQL Server restore scripts after each backup completes
Written By: Ken Simmons -- 10/23/2008
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Problem
There are a lot of scripts out there that will allow you to use the msdb to auto-generate restore scripts, but what if you cannot access the msdb database. What is the easiest way to make sure I have the proper restore scripts on hand without relying on the msdb database?
Solution
The best way to make sure you have the proper restore scripts when the time comes is to make use of PRINT statements and OUTPUT files. Every time your backup job runs, whether it is a Full or Log, place a step at the end of the job to read the new data from the msdb database and write it to an output file. I generally place the restore script in the root of my backup folders and make sure the script is backed up as well.
First, create a new SQL Agent Job step called "Generate Restore Script" at the end of your backup job and insert the script listed below.
(note: to select all text, triple click in the table below)
SET NOCOUNT ON
DECLARE @databaseName sysname
CREATE TABLE #TmpCommands
(ID INT IDENTITY(1,1),
Cmd VARCHAR(8000) )
DECLARE dbnames_cursor CURSOR
FOR
SELECT name
FROM master..sysdatabases
WHERE name NOT IN ( 'model','tempdb', 'pubs','northwind')
AND (status & 32) =0 -- Do not include loading
AND (status & 64) =0 -- Do not include loading
AND (status & 128) =0 -- Do not include recovering
AND (status & 256) =0 -- Do not include not recovered
AND (status & 512) =0 -- Do not include offline
AND (status & 32768) =0 -- Do not include emergency
AND (status & 1073741824) =0 -- Do not include cleanly shutdown
OPEN dbnames_cursor
FETCH NEXT FROM dbnames_cursor INTO @databaseName
WHILE (@@FETCH_STATUS <> -1)
BEGIN
IF (@@FETCH_STATUS <> -2)
BEGIN
INSERT INTO #TmpCommands(Cmd)
VALUES ('----------------Script to Restore the ' + @databaseName + ' Database--------------')
DECLARE @backupStartDate datetime
DECLARE @backup_set_id_start INT
DECLARE @backup_set_id_end INT
SELECT @backup_set_id_start = MAX(backup_set_id)
FROM msdb.dbo.backupset
WHERE database_name = @databaseName AND type = 'D'
SELECT @backup_set_id_end = MIN(backup_set_id)
FROM msdb.dbo.backupset
WHERE database_name = @databaseName AND type = 'D'
AND backup_set_id > @backup_set_id_start
IF @backup_set_id_end IS NULL SET @backup_set_id_end = 999999999
INSERT INTO #TmpCommands(Cmd)
SELECT Cmd FROM(
SELECT backup_set_id, 'RESTORE DATABASE ' + @databaseName + ' FROM DISK = '''
+ mf.physical_device_name + ''' WITH NORECOVERY --' Cmd
FROM msdb.dbo.backupset b,
msdb.dbo.backupmediafamily mf
WHERE b.media_set_id = mf.media_set_id
AND b.database_name = @databaseName
AND b.backup_set_id = @backup_set_id_start
UNION
SELECT backup_set_id, 'RESTORE LOG ' + @databaseName + ' FROM DISK = '''
+ mf.physical_device_name + ''' WITH FILE = ' + CAST(position AS VARCHAR(10)) + ', NORECOVERY --' Cmd
FROM msdb.dbo.backupset b,
msdb.dbo.backupmediafamily mf
WHERE b.media_set_id = mf.media_set_id
AND b.database_name = @databaseName
AND b.backup_set_id >= @backup_set_id_start AND b.backup_set_id < @backup_set_id_end
AND b.type = 'L'
UNION
SELECT 999999999 AS backup_set_id, 'RESTORE DATABASE ' + @databaseName + ' WITH RECOVERY --' Cmd
) A
ORDER BY backup_set_id
END
FETCH NEXT FROM dbnames_cursor INTO @DatabaseName
END
CLOSE dbnames_cursor
DEALLOCATE dbnames_cursor
DECLARE @PrintCommand VARCHAR(8000)
DECLARE Print_cursor CURSOR
FOR
SELECT Cmd FROM #TmpCommands
ORDER BY ID
OPEN Print_cursor
FETCH NEXT FROM Print_cursor INTO @PrintCommand
WHILE (@@FETCH_STATUS <> -1)
BEGIN
IF (@@FETCH_STATUS <> -2)
BEGIN
PRINT @PrintCommand
END
FETCH NEXT FROM Print_cursor INTO @PrintCommand
END
CLOSE Print_cursor
DEALLOCATE Print_cursor
DROP TABLE #TmpCommands |
Next, go to the Advanced Tab of the Job Step and enter a destination for the Output File as shown below.
Here is sample of what the output looks like:
So if I want to restore the "test2" database, I would just use the three lines highlighted above.
That's all there is to it. The next time your backup runs it will generate a script in the output file that can be used to restore any of the databases for the instance. Since the script runs when the backup runs, you will always have a current restore script on hand.
Next Steps
- Review the following tip to get a better understanding of how the restore script works. http://www.mssqltips.com/tip.asp?tip=1243
- Test your restore scripts. No matter how automated you make things, make sure you do not get a false sense of security when it comes to restoring your databases. There is no substitution for manually testing your restore process.
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