functions/Invoke-DbaDatabaseClone.ps1
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function Invoke-DbaDatabaseClone { <# .SYNOPSIS Clones a database schema and statistics .DESCRIPTION Clones a database schema and statistics. This can be useful for testing query performance without requiring all the space needed for the data in the database. Read more at sqlperformance: https://sqlperformance.com/2016/08/sql-statistics/expanding-dbcc-clonedatabase Thanks to Microsoft Tiger Team for the code and idea https://github.com/Microsoft/tigertoolbox/ .PARAMETER SqlInstance Allows you to specify a comma separated list of servers to query. .PARAMETER SqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: $cred = Get-Credential, this pass this $cred to the param. Windows Authentication will be used if DestinationSqlCredential is not specified. To connect as a different Windows user, run PowerShell as that user. .PARAMETER Database The database to clone - this list is auto-populated from the server. .PARAMETER CloneDatabase The name(s) to clone to. .PARAMETER UpdateStatistics Update the statistics prior to cloning (per Microsoft Tiger Team formula) .PARAMETER Silent Use this switch to disable any kind of verbose messages .NOTES Tags: Statistics, Performance Website: https://dbatools.io Copyright: (C) Chrissy LeMaire, clemaire@gmail.com License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0 .LINK https://dbatools.io/Invoke-DbaDatabaseClone .EXAMPLE Invoke-DbaDatabaseClone -SqlInstance sql2016 -Database mydb -CloneDatabase myclone Clones mydb to myclone on sql2016 .EXAMPLE Invoke-DbaDatabaseClone -SqlInstance sql2016 -Database mydb -CloneDatabase myclone, myclone2 -UpdateStatistics Updates the statistics of mydb then clones to myclone and myclone2 #> [CmdletBinding()] param ( [parameter(Position = 0)] [Alias("ServerInstance", "SqlServer", "SqlServers")] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [parameter(Mandatory, ValueFromPipeline)] [object]$Database, [string[]]$CloneDatabase, [switch]$UpdateStatistics, [switch]$Silent ) begin { if (-not $Database.Name -and -not $SqlInstance) { Stop-Function -Message "You must specify a server name if you did not pipe a database" } $updatestats = "declare @out table(id int identity(1,1),s sysname, o sysname, i sysname, stats_stream varbinary(max), rows bigint, pages bigint) declare @dbcc table(stats_stream varbinary(max), rows bigint, pages bigint) declare c cursor for select object_schema_name(object_id) s, object_name(object_id) o, name i from sys.indexes where type_desc in ('CLUSTERED COLUMNSTORE', 'NONCLUSTERED COLUMNSTORE') declare @s sysname, @o sysname, @i sysname open c fetch next from c into @s, @o, @i while @@FETCH_STATUS = 0 begin declare @showStats nvarchar(max) = N'DBCC SHOW_STATISTICS(""' + quotename(@s) + '.' + quotename(@o) + '"", ' + quotename(@i) + ') with stats_stream' insert @dbcc exec sp_executesql @showStats insert @out select @s, @o, @i, stats_stream, rows, pages from @dbcc delete @dbcc fetch next from c into @s, @o, @i end close c deallocate c declare @sql nvarchar(max); declare @id int; select top 1 @id=id,@sql= 'UPDATE STATISTICS ' + quotename(s) + '.' + quotename(o) + '(' + quotename(i) + ') with stats_stream = ' + convert(nvarchar(max), stats_stream, 1) + ', rowcount = ' + convert(nvarchar(max), rows) + ', pagecount = ' + convert(nvarchar(max), pages) from @out WHILE (@@ROWCOUNT <> 0) BEGIN exec sp_executesql @sql delete @out where id = @id select top 1 @id=id,@sql= 'UPDATE STATISTICS ' + quotename(s) + '.' + quotename(o) + '(' + quotename(i) + ') with stats_stream = ' + convert(nvarchar(max), stats_stream, 1) + ', rowcount = ' + convert(nvarchar(max), rows) + ', pagecount = ' + convert(nvarchar(max), pages) from @out END" } process { if (Test-FunctionInterrupt) { return } foreach ($instance in $SqlInstance) { Write-Message -Level Verbose -Message "Attempting to connect to $instance" try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 10 } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } $minimum = [version]"12.0.5000.0" # SQL 2014 SP2 if ($server.Version -lt $minimum) { Stop-Function -Message "Unsupported version for $instance. SQL Server 2014 SP2 and above required." -Target $server -Continue } if (-not $Database.Name) { [Microsoft.SqlServer.Management.Smo.Database]$database = $server.Databases[$database] } if ($Database.IsSystemObject) { Stop-Function -Message "Only user databases are supported" -Target $instance -Continue } if (-not $Database.name) { Stop-Function -Message "Database not found" -Target $instance -Continue } if ($UpdateStatistics) { try { Write-Message -Level Verbose -Message "Updating statistics" $null = $database.Query($updatestats) } catch { Stop-Function -Message "Failure" -ErrorRecord $_ -Target $server -Continue } } $dbname = $database.Name foreach ($db in $CloneDatabase) { Write-Message -Level Verbose -Message "Cloning $db from $database" if ($server.Databases[$db]) { Stop-Function -Message "Destination clone database $db already exists" -Target $instance -Continue } else { try { $sql = "dbcc clonedatabase('$dbname','$db')" $null = $database.Query($sql) $server.Databases.Refresh() Get-DbaDatabase -SqlInstance $server -Database $db } catch { Stop-Function -Message "Failure" -ErrorRecord $_ -Target $server -Continue } } } } } } |