SQL Server : How to Keep Database Restore History

Background 

Recently, one of our DBA restored a database on live server, but with old backup accidentally. Later on, we have found that it was hard to detect which backup was actually restored. To check, which backups we have created for database we have a perfect script, which you can find over here and here. But unfortunately no such script found anywhere to get restore history.

Here is a script, we have used to create a job, which will fetch restore related log entries from SQL Server Log and will archive it to a user created history table.

Using the code

/************************
Script Purpose: To Keep Database Restore Log
Script By : Aasim Abdullah for https://connectsql.blogspot.com
************************/

USE master
GO
CREATE TABLE DatabaseRestoreLog
(DatabaseName VARCHAR(50), RestoreDate DATETIME, RestoredFrom VARCHAR(500))

GO
/****** Start: Job step script *****/
-- Table variable to hold intermediate data
DECLARE @ReportSQLErrorLogs TABLE
    (
      [log_date] [datetime] NULL,
      [processinfo] [varchar](255) NULL,
      [processtext] [text] NULL
    )

DECLARE @NumErrorLogs INT,
    @CurrentLogNum INT

SET @CurrentLogNum = 0

-- Get total number of log files from registry
EXEC master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE',
    N'Software\Microsoft\MSSQLServer\MSSQLServer', N'NumErrorLogs',
    @NumErrorLogs OUTPUT

SELECT @NumErrorLogs = ISNULL(@NumErrorLogs, 6)
 -- NULL in registry entry for Error Log files mean default of 6 value

WHILE @CurrentLogNum < @NumErrorLogs
    BEGIN
        insert into @ReportSQLErrorLogs
                exec master..xp_readerrorlog @CurrentLogNum
        PRINT @CurrentLogNum
        SELECT @CurrentLogNum = @CurrentLogNum + 1
    END

INSERT INTO DatabaseRestoreLog
SELECT SUBSTRING(processtext, CHARINDEX('base:', processtext, 1) + 5,
                  CHARINDEX(',', processtext, 0) - ( CHARINDEX('base:', processtext, 0) )
                  - 5), log_date,
            SUBSTRING(processtext, CHARINDEX(': {''', processtext, 1) + 4,
                  CHARINDEX('''})', processtext, 0) - ( CHARINDEX(': {''', processtext, 0) )- 4)
FROM @ReportSQLErrorLogs
WHERE processtext LIKE 'Database was restored%'
--For last 24 hours
AND DATEDIFF(HH,log_date,GETDATE()) <=24
ORDER BY log_date DESC

/****** End: Job step script *****/

Output of history table will be as following.