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Archive for January, 2014
Stored Procedure for Querying the Default Trace Using fn_trace_gettable
January 30, 2014
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This morning I needed to query the default trace using fn_trace_gettable. fn_trace_gettable is a table-based function that returns the contents of a SQL trace file you pass to it. Like any table-based function, you SELECT from the function like you would a table and can include a column list and WHERE predicates. Here is an sample query:
SELECT * FROM fn_trace_gettable('C:\filepath\yourtracefile.trc', DEFAULT)
The DEFAULT parameter following the file name will read all existing rollover files, in addition to the file specified. I created stored procedure sp_QueryTraceFiles to return the columns I was interested in while dynamically building the WHERE predicates based on parameters passed in. See the comments for more information.
USE master
GO
-- =============================================
-- Created By: Frank Gill - skreebydba.com
-- Date: 2014-01-30
-- Purpose: To select rows from the default trace
-- Disclaimer: The author takes no responsibility if your production system
-- descends into a smoking hole after running this proc.
-- Like all code on the internet, run in test before running in prod.
-- Sample Execution:
-- EXEC dbo.sp_QueryTraceFiles
-- @starttime = '2014-01-30 12:01:59',
-- @servername = 'YourServer',
-- @databasename = 'YourDatabase',
-- @loginname = 'YourLogin',
-- @applicationname = 'YourApplication',
-- @textdata = 'YourText',
-- @objectname = 'YourObject'
-- =============================================
-- Drop stored procedure if it already exists
IF EXISTS (
SELECT *
FROM INFORMATION_SCHEMA.ROUTINES
WHERE SPECIFIC_SCHEMA = N'dbo'
AND SPECIFIC_NAME = N'sp_QueryTraceFiles'
)
DROP PROCEDURE dbo.sp_QueryTraceFiles
GO
CREATE PROCEDURE dbo.sp_QueryTraceFiles
@starttime DATETIME = NULL, -- Procedure will return trace rows with a StartTime > @startime
@servername SYSNAME = NULL, -- Procedure will return trace rows executed from server = @servername
@databasename SYSNAME = NULL, -- Procedure will return trace rows executed against database = @databasename
@loginname SYSNAME = NULL, -- Procedure will return trace rows executed by login = @loginname
@applicationname VARCHAR(255) = NULL, -- Procedure will return trace rows executed by ApplicationName LIKE @applicationname
@textdata VARCHAR(1000) = NULL, -- Procedure will return trace rows with TextData LIKE @textdata
@objectname SYSNAME = NULL, -- Procedure will return trace rows executed against object = @objectname
@noexec BIT = 0 -- @noexec = 1 will print the dynamic SQL statement instead of executing it
AS
-- Drop temp table if it exists
IF EXISTS(SELECT 1 FROM tempdb.sys.objects WHERE name LIKE '%#traceinfo%')
BEGIN
DROP TABLE #traceinfo
END
-- Declare local variables
DECLARE @tracefile VARCHAR(1000)
DECLARE @sqlstr VARCHAR(2000)
DECLARE @wherebit BIT = 0
-- Select fn_trace_getinfo into temp table #traceinfo to get the default trace file location and name
-- traceid = 1 returns the default trace
SELECT * INTO #traceinfo FROM fn_trace_getinfo(NULL)
WHERE traceid = 1
-- Select default trace file name and location into variable for use in query
-- property = 2 is the trace file name
SELECT @tracefile = CAST(value AS VARCHAR(1000)) FROM #traceinfo
WHERE property = 2
-- Build dynamic SQL string without WHERE predicates to return information from the default trace files using fn_trace_gettable
-- The DEFAULT parm will read all existing rollover files
-- Join to sys.trace_events to return the trace event name
SELECT @sqlstr = 'SELECT trc.SPID AS [Process ID],
trc.StartTime AS [Start Time],
trc.ServerName AS [Server Name],
trc.DatabaseName AS [Database Name],
trc.LoginName AS [Login Name],
trc.ApplicationName AS [Application Name],
trc.TextData AS [Text Data],
trc.ObjectName AS [Object Name],
evt.name AS [Event Name]
FROM fn_trace_gettable(' + '''' + @tracefile + '''' + ', DEFAULT) trc
INNER JOIN sys.trace_events evt
ON trc.EventClass = evt.trace_event_id'
-- Append WHERE predicates if parameters are passed in
IF @starttime IS NOT NULL
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.StartTime > ' + '''' + CAST(@starttime AS VARCHAR(30)) + ''''
END
IF @servername IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.ServerName = ' + '''' + @servername + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.ServerName = ' + '''' + @servername + ''''
END
END
IF @loginname IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.LoginName = ' + '''' + @loginname + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.LoginName = ' + '''' + @loginname + ''''
END
END
IF @applicationname IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.ApplicationName LIKE ' + '''' + '%' + @applicationname + '%' + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.ApplicationName LIKE ' + '''' + '%' + @applicationname + '%' + ''''
END
END
IF @textdata IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.TextData LIKE ' + '''' + '%' + @textdata + '%' + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.TextData LIKE ' + '''' + '%' + @textdata + '%' + ''''
END
END
IF @objectname IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.ObjectName = ' + '''' + @objectname + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.ObjectName = ' + '''' + @objectname + ''''
END
END
IF @databasename IS NOT NULL
BEGIN
IF @wherebit = 0
BEGIN
SET @wherebit = 1
SET @sqlstr = @sqlstr + ' WHERE trc.DatabaseName = ' + '''' + @databasename + ''''
END
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' AND trc.DatabaseName = ' + '''' + @databasename + ''''
END
END
-- Append ORDER BY clause to the dynamic SQL string
SET @sqlstr = @sqlstr + ' ORDER BY trc.StartTime DESC'
IF @noexec = 1
BEGIN
PRINT @sqlstr
END
ELSE
BEGIN
EXEC(@sqlstr)
END
GO
Categories: SQL Server, T-SQL
SQL Server, T-SQL
Stored Procedure to Automate Restores – Mark II
January 13, 2014
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As promised in my last post, I’ve updated the automated restore stored procedure to handle error. There are now custom error messages for a database with no full backup files and for databases that have more than one log file. Additionally, I have added code to handle differential backup files.
Once again, I hope you can put this to use.
UPDATE
I’ve modified the proc to change the physical data and log file names if the @sourcedbname and @restoredbname are different. The previous version worked if the @sourcedbname was contained in the physical file names.
USE master
GO
-- =============================================
-- Frank Gill - skreebydba.com - 2013-01-12
-- sp_AutomateDatabaseRestores
-- This script is provided with no guarantees
-- Please run in your test environment before deploying to production
-- The author takes no responsibility if your server descends into a smoking hole
-- 2013-01-13 - Updated procedure to append _restoredb to the physical data and
-- log file if @sourcedbname and @restoredbname are different
-- =============================================
-- Drop stored procedure if it already exists
IF EXISTS (
SELECT *
FROM INFORMATION_SCHEMA.ROUTINES
WHERE SPECIFIC_SCHEMA = N'dbo'
AND SPECIFIC_NAME = N'sp_AutomateDatabaseRestores'
)
DROP PROCEDURE dbo.sp_AutomateDatabaseRestores
GO
CREATE PROCEDURE dbo.sp_AutomateDatabaseRestores
@sourcedbname SYSNAME,
@restoredbname SYSNAME,
@droprestoredb TINYINT = 1,
@noexec TINYINT = 0
AS
SET NOCOUNT ON
BEGIN TRY
--Drop temp tables if they exist
IF OBJECT_ID('tempdb..#backupfiles') IS NOT NULL
BEGIN
DROP TABLE #backupfiles
END
IF OBJECT_ID('tempdb..#databasefiles') IS NOT NULL
BEGIN
DROP TABLE #databasefiles
END
--Create temp tables
CREATE TABLE #backupfiles
(physicalfilename VARCHAR(2000)
,backuptype CHAR(4))
CREATE TABLE #databasefiles
(DatabaseName SYSNAME
,LogicalName SYSNAME
,PhysicalName VARCHAR(2000)
,filetype TINYINT)
--Declare local variables
DECLARE @filecount SMALLINT
DECLARE @fullfilecount SMALLINT
DECLARE @loopcount SMALLINT
DECLARE @datafileloopcount SMALLINT
DECLARE @backuploopcount SMALLINT
DECLARE @backupfile VARCHAR(2000)
DECLARE @sqlstr VARCHAR(MAX)
DECLARE @backupfiletype CHAR(4)
DECLARE @datafilecount SMALLINT
DECLARE @logfilecount SMALLINT
DECLARE @logbackupcount SMALLINT
DECLARE @diffbackupcount SMALLINT
DECLARE @datafile VARCHAR(2000)
DECLARE @moveparm VARCHAR(2000)
DECLARE @fromstatement VARCHAR(2000)
DECLARE @logfile SYSNAME
DECLARE @physlogfile VARCHAR(2000)
DECLARE @physdatafile VARCHAR(2000)
--Drop the restored database if it exists and @droprestoredb = 1
IF EXISTS(SELECT 1 FROM sys.databases WHERE name = @restoredbname) AND @droprestoredb = 1
BEGIN
SET @sqlstr = 'DROP DATABASE ' + @restoredbname
EXEC (@sqlstr)
END
--Initialize variables
SET @moveparm = ' WITH'
SET @fromstatement = ' FROM '
SET @loopcount = 1
SET @datafileloopcount = 1
SET @backuploopcount = 1
--Build dynamic SQL to get a list of data and log files for the source database
SET @sqlstr = 'INSERT INTO #databasefiles SELECT ' + '''' + @sourcedbname + '''' + ' AS DatabaseName, name, physical_name, type
FROM ' + @sourcedbname + '.sys.database_files'
--Execute dynamic SQL to return data and log files for the source database
EXEC (@sqlstr)
--Get counts of data files and log files
SELECT @datafilecount = COUNT(*) FROM #databasefiles WHERE filetype = 0
SELECT @logfilecount = COUNT(*) FROM #databasefiles WHERE filetype = 1
IF @logfilecount > 1
BEGIN
RAISERROR ('You have more than one log file, which is a really bad idea. No backup for you. See this link for more information. http://www.sqlskills.com/blogs/paul/multiple-log-files-and-why-theyre-bad/', -- Message text.
16, -- Severity.
1 -- State.
);
END
--Get the logical and physical log file names
--If restoring to a different database name, append _restore onto the end of the physical file names
IF @sourcedbname <> @restoredbname
BEGIN
SELECT @logfile = LogicalName, @physlogfile = REPLACE(PhysicalName,'.ldf','_restore.ldf')
FROM #databasefiles
WHERE filetype = 1
END
ELSE
BEGIN
SELECT @logfile = LogicalName, @physlogfile = PhysicalName
FROM #databasefiles
WHERE filetype = 1
END
--If the database contains one data file, build the MOVE clause for a single file
IF @datafilecount = 1
BEGIN
IF @sourcedbname <> @restoredbname
BEGIN
SELECT @datafile = LogicalName, @physdatafile = REPLACE(PhysicalName,'.mdf','_restore.mdf')
FROM #databasefiles
WHERE filetype = 0
END
ELSE
BEGIN
SELECT @datafile = LogicalName, @physdatafile = PhysicalName
FROM #databasefiles
WHERE filetype = 0
END
SET @moveparm = @moveparm + ' MOVE ' + '''' + @datafile + '''' + ' TO ' + '''' + @physdatafile + '''' + ',' + ' MOVE ' + '''' + @logfile + '''' + ' TO ' + '''' + @physlogfile + '''' + ', NORECOVERY'
END
ELSE
--If the database contains more than one data file, loop through the list of files and build a multi-file MOVE statement
IF @datafilecount > 1
BEGIN
--SELECT @datafileloopcount, @datafilecount
WHILE @datafileloopcount <= @datafilecount
BEGIN
IF @sourcedbname <> @restoredbname
BEGIN
SET @physdatafile = (SELECT TOP (1) REPLACE(PhysicalName,'.mdf','_restore.mdf') FROM #databasefiles WHERE filetype = 0)
END
ELSE
BEGIN
SET @physdatafile = (SELECT TOP (1) PhysicalName FROM #databasefiles WHERE filetype = 0)
END
SET @datafile = (SELECT TOP (1) LogicalName FROM #databasefiles WHERE filetype = 0)
SET @moveparm = @moveparm + ' MOVE ' + '''' + @datafile + '''' + ' TO ' + '''' + @physdatafile + '''' + ','
DELETE TOP (1) FROM #databasefiles WHERE filetype = 0
SET @datafileloopcount += 1
END
--Append the MOVE command for the log file to the MOVE clause and set it to NORECOVERY
SET @moveparm = @moveparm + ' MOVE ' + '''' + @logfile + '''' + ' TO ' + '''' + @physlogfile + '''' + ', NORECOVERY'
END
IF @droprestoredb = 0
BEGIN
SET @moveparm = @moveparm + ', REPLACE'
END
--Get the most recent full backup file for the source database and insert it into the #backupfiles temp table
INSERT INTO #backupfiles
SELECT
b.physical_device_name, 'FULL' AS [backuptype]
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id = b.media_set_id
where a.database_name = @sourcedbname
AND backup_finish_date =
(SELECT MAX(c.backup_finish_date)
FROM msdb.dbo.backupset c
INNER JOIN msdb.dbo.backupmediafamily d
ON c.media_set_id = d.media_set_id
WHERE c.database_name = @sourcedbname
AND c.type = 'D')
order by a.backup_finish_date ASC
--Get a list of differential backup files older than the most recent full backup
INSERT INTO #backupfiles
SELECT TOP 1
b.physical_device_name, 'DIFF' AS [backuptype]
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id = b.media_set_id
where a.database_name = @sourcedbname
AND a.type = 'I'
AND backup_finish_date >
(SELECT MAX(c.backup_finish_date)
FROM msdb.dbo.backupset c
INNER JOIN msdb.dbo.backupmediafamily d
ON c.media_set_id = d.media_set_id
WHERE c.database_name = @sourcedbname
AND c.type = 'D')
order by a.backup_finish_date DESC
--Get all log backupfiles run after the latest full or differential backup and insert it into the #backupfiles temp table
INSERT INTO #backupfiles
SELECT
b.physical_device_name, 'LOG' AS [backuptype]
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id = b.media_set_id
where a.database_name = @sourcedbname
AND a.type = 'L'
AND backup_finish_date >
(SELECT MAX(c.backup_start_date)
FROM msdb.dbo.backupset c
INNER JOIN msdb.dbo.backupmediafamily d
ON c.media_set_id = d.media_set_id
WHERE c.database_name = @sourcedbname
AND c.type IN ('D', 'I'))
order by a.backup_finish_date ASC
--Get counts of all backup files, full backup files, differential backup files, and log backup files for use in loop processing below
SELECT @filecount = COUNT(*) FROM #backupfiles
SELECT @fullfilecount = COUNT(*) FROM #backupfiles WHERE backuptype = 'FULL'
SELECT @diffbackupcount = COUNT(*) FROM #backupfiles WHERE backuptype = 'DIFF'
SELECT @logbackupcount = COUNT(*) FROM #backupfiles WHERE backuptype = 'LOG'
IF @fullfilecount = 0
BEGIN
RAISERROR ('There are no full backup files for your database.', -- Message text.
16, -- Severity.
1 -- State.
);
END
--While backup files exists, loop through them to generate the restore statement
WHILE @loopcount <= @filecount
BEGIN
--Get the top backup file from the temp table
SET @backupfiletype = (SELECT TOP 1 backuptype FROM #backupfiles)
--If it is a full backup file, build the restore statement
IF @backupfiletype = 'FULL'
BEGIN
--If there are no log backups to apply, replace NORECOVERY with RECOVERY in the MOVE clause
IF (@logbackupcount = 0 AND @diffbackupcount = 0)
BEGIN
SET @moveparm = REPLACE(@moveparm, 'NORECOVERY', 'RECOVERY')
END
--If there is a single full backup file, build the RESTORE statement with that file
IF @fullfilecount = 1
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles)
SET @sqlstr = 'RESTORE DATABASE ' + @restoredbname + ' FROM DISK = ' + '''' + @backupfile + '''' + @moveparm
--PRINT @sqlstr
DELETE TOP (1) FROM #backupfiles
END
--If there is more than one full backup file, build the RESTORE command for all full backup files
ELSE IF @fullfilecount > 1
BEGIN
WHILE @backuploopcount <= @fullfilecount
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles WHERE backuptype = 'FULL')
SET @fromstatement = @fromstatement + 'DISK = ' + '''' + @backupfile + '''' + ','
DELETE TOP (1) FROM #backupfiles WHERE backuptype = 'FULL'
SET @backuploopcount += 1
END
--Truncate the trailing comma from the FROM clause
SET @fromstatement = SUBSTRING(@fromstatement,1,(LEN(@fromstatement) - 1))
SET @sqlstr = 'RESTORE DATABASE ' + @restoredbname + @fromstatement + @moveparm
SET @loopcount += 1
--PRINT @sqlstr
END
END
--One RESTORE datement will be built for the most recent differential backup
ELSE IF @backupfiletype = 'DIFF'
BEGIN
IF @diffbackupcount = 1 AND @logbackupcount = 0
BEGIN
SET @moveparm = REPLACE(@moveparm, 'NORECOVERY', 'RECOVERY')
END
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles)
SET @sqlstr = 'RESTORE DATABASE ' + @restoredbname + ' FROM DISK = ' + '''' + @backupfile + '''' + @moveparm
--PRINT @sqlstr
DELETE TOP (1) FROM #backupfiles
END
--If it is a log backup file, build a RESTORE log statement
--One RESTORE datement will be built for each log backup file
ELSE IF @backupfiletype = 'LOG'
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles)
SET @sqlstr = 'RESTORE LOG ' + @restoredbname + ' FROM DISK = ' + '''' + @backupfile + ''''
--If there is another log backup file, set the RESTORE to WITH NORECOVERY
IF (SELECT COUNT(*) FROM #backupfiles) > 1
BEGIN
SET @sqlstr = @sqlstr + ' WITH NORECOVERY'
END
--If there is not another log backup file, set the RESTORE to WITH RECOVERY
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' WITH RECOVERY'
END
DELETE TOP (1) FROM #backupfiles
END
--If @noexec = 1, PRINT @sqlstr
IF @noexec = 1
BEGIN
PRINT @sqlstr
END
--If @noexec <> 1, EXEC @sqlstr
ELSE
BEGIN
EXEC (@sqlstr)
END
--Increment the loop count and continue processing backup files
SET @loopcount += 1
END
END TRY
BEGIN CATCH
SELECT
ERROR_NUMBER() AS ErrorNumber,
ERROR_SEVERITY() AS ErrorSeverity,
ERROR_STATE() as ErrorState,
ERROR_PROCEDURE() as ErrorProcedure,
ERROR_LINE() as ErrorLine,
ERROR_MESSAGE() as ErrorMessage;
END CATCH
GO
Categories: Restores, SQL Server, T-SQL
SQL Server, T-SQL
Stored Procedure to Automate Database Restores
January 9, 2014
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It’s been awhile since I’ve posted here, and I’ve already fallen behind on my New Year’s resolution to post once a week. I will do what I can to keep up over the next 51 weeks.
For the past few months, I’ve been working to standardize the backup processes at my current job. Recently, I’ve needed to develop a process to restore a read-only copy of a production database using the most recent full backup file and any subsequent log backup files. The procedure below does that. It will work for database backups containing multiple backup files and databases containing multiple data files. However, if you have more than one log file in your database, you are out of luck. See Paul Randal’s post Multiple Log Files and Why They’re Bad for an excellent explanation of why you shouldn’t do that. I will add error handling to deal with this scenario this weekend.
I hope you can put this to use. Let me know if you have questions.
USE YourDatabaseName
GO
-- =============================================
-- Frank Gill - skreebydba.com
-- sp_AutomateDatabaseRestores
-- This script is provided with no guarantees
-- Please run in you test environment before deploying to production
-- The author takes no responsibility if your server descends into a smoking hole
-- =============================================
-- Drop stored procedure if it already exists
IF EXISTS (
SELECT *
FROM INFORMATION_SCHEMA.ROUTINES
WHERE SPECIFIC_SCHEMA = N'dbo'
AND SPECIFIC_NAME = N'sp_AutomateDatabaseRestores'
)
DROP PROCEDURE dbo.sp_AutomateDatabaseRestores
GO
CREATE PROCEDURE dbo.sp_AutomateDatabaseRestores
@sourcedbname SYSNAME,
@restoredbname SYSNAME,
@droprestoredb TINYINT = 1,
@noexec TINYINT = 0
AS
SET NOCOUNT ON
--Drop temp tables if they exist
IF OBJECT_ID('tempdb..#backupfiles') IS NOT NULL
BEGIN
DROP TABLE #backupfiles
END
IF OBJECT_ID('tempdb..#databasefiles') IS NOT NULL
BEGIN
DROP TABLE #databasefiles
END
--Create temp tables
CREATE TABLE #backupfiles
(physicalfilename VARCHAR(2000)
,recoverymodel CHAR(4))
CREATE TABLE #databasefiles
(DatabaseName SYSNAME
,LogicalName SYSNAME
,PhysicalName VARCHAR(2000)
,filetype TINYINT)
--Declare local variables
DECLARE @filecount SMALLINT
DECLARE @fullfilecount SMALLINT
DECLARE @loopcount SMALLINT
DECLARE @datafileloopcount SMALLINT
DECLARE @backuploopcount SMALLINT
DECLARE @backupfile VARCHAR(2000)
DECLARE @sqlstr VARCHAR(MAX)
DECLARE @backupfiletype CHAR(4)
DECLARE @datafilecount SMALLINT
DECLARE @logfilecount SMALLINT
DECLARE @logbackupcount SMALLINT
DECLARE @datafile VARCHAR(2000)
DECLARE @moveparm VARCHAR(2000)
DECLARE @fromstatement VARCHAR(2000)
DECLARE @logfile SYSNAME
DECLARE @physlogfile VARCHAR(2000)
DECLARE @physdatafile VARCHAR(2000)
--Drop the restored database if it exists and @droprestoredb = 1
IF EXISTS(SELECT 1 FROM sys.databases WHERE name = @restoredbname) AND @droprestoredb = 1
BEGIN
SET @sqlstr = 'DROP DATABASE ' + @restoredbname
EXEC (@sqlstr)
END
--Initialize variables
SET @moveparm = ' WITH'
SET @fromstatement = ' FROM '
SET @loopcount = 1
SET @datafileloopcount = 1
SET @backuploopcount = 1
--Build dynamic SQL to get a list of data and log files for the source database
SET @sqlstr = 'INSERT INTO #databasefiles SELECT ' + '''' + @sourcedbname + '''' + ' AS DatabaseName, name, physical_name, type
FROM ' + @sourcedbname + '.sys.database_files'
--Execute dynamic SQL to return data and log files for the source database
EXEC (@sqlstr)
--Get counts of data files and log files
SELECT @datafilecount = COUNT(*) FROM #databasefiles WHERE filetype = 0
SELECT @logfilecount = COUNT(*) FROM #databasefiles WHERE filetype = 1
--Get the logical and physical log file names
SELECT @logfile = LogicalName, @physlogfile = REPLACE(PhysicalName,@sourcedbname,@restoredbname)
FROM #databasefiles
WHERE filetype = 1
--If the database contains one data file, build the MOVE clause for a single file
IF @datafilecount = 1
BEGIN
SELECT @datafile = LogicalName, @physdatafile = REPLACE(PhysicalName,@sourcedbname,@restoredbname)
FROM #databasefiles
WHERE filetype = 0
SET @moveparm = @moveparm + ' MOVE ' + '''' + @datafile + '''' + ' TO ' + '''' + @physdatafile + '''' + ',' + ' MOVE ' + '''' + @logfile + '''' + ' TO ' + '''' + @physlogfile + '''' + ', NORECOVERY'
END
ELSE
--If the database contains more than one data file, loop through the list of files and build a multi-file MOVE statement
IF @datafilecount > 1
BEGIN
--SELECT @datafileloopcount, @datafilecount
WHILE @datafileloopcount <= @datafilecount
BEGIN
--SELECT TOP (1) LogicalName, REPLACE(PhysicalName,@sourcedbname,@restoredbname) FROM #databasefiles WHERE filetype = 0
SET @physdatafile = (SELECT TOP (1) REPLACE(PhysicalName,@sourcedbname,@restoredbname) FROM #databasefiles WHERE filetype = 0)
SET @datafile = (SELECT TOP (1) LogicalName FROM #databasefiles WHERE filetype = 0)
SET @moveparm = @moveparm + ' MOVE ' + '''' + @datafile + '''' + ' TO ' + '''' + @physdatafile + '''' + ','
DELETE TOP (1) FROM #databasefiles WHERE filetype = 0
SET @datafileloopcount += 1
END
--Append the MOVE command for the log file to the MOVE clause and set it to NORECOVERY
SET @moveparm = @moveparm + ' MOVE ' + '''' + @logfile + '''' + ' TO ' + '''' + @physlogfile + '''' + ', NORECOVERY'
END
IF @droprestoredb = 0
BEGIN
SET @moveparm = @moveparm + ', REPLACE'
END
--Get the most recent full backup file for the source database and insert it into the #backupfiles temp table
INSERT INTO #backupfiles
SELECT
b.physical_device_name, 'FULL' AS [RecoveryModel]
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id = b.media_set_id
where a.database_name = @sourcedbname
AND backup_finish_date =
(SELECT MAX(c.backup_finish_date)
FROM msdb.dbo.backupset c
INNER JOIN msdb.dbo.backupmediafamily d
ON c.media_set_id = d.media_set_id
WHERE c.database_name = @sourcedbname
AND REVERSE(SUBSTRING(REVERSE(d.physical_device_name),1,3)) = 'BAK')
order by a.backup_finish_date ASC
--Get all log backupfiles run after the latest full backup and insert it into the #backupfiles temp table
INSERT INTO #backupfiles
SELECT
b.physical_device_name, 'LOG' AS [RecoveryModel]
from msdb.dbo.backupset a join msdb.dbo.backupmediafamily b
on a.media_set_id = b.media_set_id
where a.database_name = @sourcedbname
AND REVERSE(SUBSTRING(REVERSE(b.physical_device_name),1,3)) = 'TRN'
AND backup_finish_date >
(SELECT MAX(c.backup_start_date)
FROM msdb.dbo.backupset c
INNER JOIN msdb.dbo.backupmediafamily d
ON c.media_set_id = d.media_set_id
WHERE c.database_name = @sourcedbname
AND REVERSE(SUBSTRING(REVERSE(d.physical_device_name),1,3)) = 'BAK')
order by a.backup_finish_date ASC
--Get counts of all backup files, full backup files, and log backup files for use in loop processing below
SELECT @filecount = COUNT(*) FROM #backupfiles
SELECT @fullfilecount = COUNT(*) FROM #backupfiles WHERE recoverymodel = 'FULL'
SELECT @logbackupcount = COUNT(*) FROM #backupfiles WHERE recoverymodel = 'LOG'
--While backup files exists, loop through them to generate the restore statement
WHILE @loopcount <= @filecount
BEGIN
--Get the top backup file from the temp table
SET @backupfiletype = (SELECT TOP 1 recoverymodel FROM #backupfiles)
--If it is a full backup file, build the restore statement
IF @backupfiletype = 'FULL'
BEGIN
--If there are no log backups to apply, replace NORECOVERY with RECOVERY in the MOVE clause
IF @logbackupcount = 0
BEGIN
SET @moveparm = REPLACE(@moveparm, 'NORECOVERY', 'RECOVERY')
END
--If there is a single full backup file, build the RESTORE statement with that file
IF @fullfilecount = 1
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles)
SET @sqlstr = 'RESTORE DATABASE ' + @restoredbname + ' FROM DISK = ' + '''' + @backupfile + '''' + @moveparm
--PRINT @sqlstr
DELETE TOP (1) FROM #backupfiles
END
--If there is more than one full backup file, build the RESTORE command for all full backup files
ELSE IF @fullfilecount > 1
BEGIN
WHILE @backuploopcount <= @fullfilecount
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles WHERE recoverymodel = 'FULL')
SET @fromstatement = @fromstatement + 'DISK = ' + '''' + @backupfile + '''' + ','
DELETE TOP (1) FROM #backupfiles WHERE recoverymodel = 'FULL'
SET @backuploopcount += 1
END
--Truncate the trailing comma from the FROM clause
SET @fromstatement = SUBSTRING(@fromstatement,1,(LEN(@fromstatement) - 1))
SET @sqlstr = 'RESTORE DATABASE ' + @restoredbname + @fromstatement + @moveparm
SET @loopcount += 1
--PRINT @sqlstr
END
END
--If it is a log backup file, build a RESTORE log statement
--One RESTORE datement will be built for each log backup file
ELSE IF @backupfiletype = 'LOG'
BEGIN
SET @backupfile = (SELECT TOP 1 physicalfilename FROM #backupfiles)
SET @sqlstr = 'RESTORE LOG ' + @restoredbname + ' FROM DISK = ' + '''' + @backupfile + ''''
--If there is another log backup file, set the RESTORE to WITH NORECOVERY
IF (SELECT COUNT(*) FROM #backupfiles) > 1
BEGIN
SET @sqlstr = @sqlstr + ' WITH NORECOVERY'
END
--If there is not another log backup file, set the RESTORE to WITH RECOVERY
ELSE
BEGIN
SET @sqlstr = @sqlstr + ' WITH RECOVERY'
END
DELETE TOP (1) FROM #backupfiles
END
--If @noexec = 1, PRINT @sqlstr
IF @noexec = 1
BEGIN
PRINT @sqlstr
END
--If @noexec <> 1, EXEC @sqlstr
ELSE
BEGIN
EXEC (@sqlstr)
END
--Increment the loop count and continue processing backup files
SET @loopcount += 1
END
GO
Categories: Restores, SQL Server, T-SQL
SQL Server, T-SQL