functions/Test-SqlMigrationConstraint.ps1
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Function Test-SqlMigrationConstraint { <# .SYNOPSIS Show if you can migrate the database(s) between the servers. .DESCRIPTION When you want to migrate from a higher edition to a lower one there are some features that can't be used. This function will validate if you have any of this features in use and will report to you. The validation will be made ONLY on on SQL Server 2008 or higher using the 'sys.dm_db_persisted_sku_features' dmv. This function only validate SQL Server 2008 versions or higher. The editions supported by this function are: - Enterprise - Developer - Evaluation - Standard - Express Take into account the new features introduced on SQL Server 2016 SP1 for all versions. More information at https://blogs.msdn.microsoft.com/sqlreleaseservices/sql-server-2016-service-pack-1-sp1-released/ The -Databases parameter is autopopulated for command-line completion. .PARAMETER Source Source SQL Server.You must have sysadmin access and server version must be SQL Server version 2000 or greater. .PARAMETER Destination Destination Sql Server. You must have sysadmin access and server version must be SQL Server version 2000 or greater. .PARAMETER SourceSqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: .PARAMETER WhatIf Shows what would happen if the command were to run. No actions are actually performed. .PARAMETER Confirm Prompts you for confirmation before executing any changing operations within the command. $scred = Get-Credential, this pass $scred object 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 DestinationSqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: $dcred = Get-Credential, this pass this $dcred 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. .NOTES Original Author: Cláudio Silva (@ClaudioESSilva) dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com) Copyright (C) 2016 Chrissy LeMaire This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. .LINK https://dbatools.io/Test-SqlMigrationConstraint .EXAMPLE Test-SqlMigrationConstraint -Source sqlserver2014a -Destination sqlcluster Description All databases will be verified for features in use that can't be supported on the destination server .EXAMPLE Test-SqlMigrationConstraint -Source sqlserver2014a -Destination sqlcluster -SqlCredential $cred Description All databases will be verified for features in use that can't be supported on the destination server using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster. .EXAMPLE Test-SqlMigrationConstraint -Source sqlserver2014a -Destination sqlcluster -Databases db1 Only db1 database will be verified for features in use that can't be supported on the destination server #> [CmdletBinding(DefaultParameterSetName = "DbMigration", SupportsShouldProcess = $true)] Param ( [parameter(Position = 1, Mandatory = $true, ValueFromPipeline = $True)] [object]$Source, [parameter(Position = 2, Mandatory = $true)] [object]$Destination, [parameter(Position = 4)] [System.Management.Automation.PSCredential]$SourceSqlCredential, [parameter(Position = 5)] [System.Management.Automation.PSCredential]$DestinationSqlCredential ) DynamicParam { if ($source) { return Get-ParamSqlDatabases -SqlServer $source -SqlCredential $SourceSqlCredential } } BEGIN { <# 1804890536 = Enterprise 1872460670 = Enterprise Edition: Core-based Licensing 610778273 = Enterprise Evaluation 284895786 = Business Intelligence -2117995310 = Developer -1592396055 = Express -133711905= Express with Advanced Services -1534726760 = Standard 1293598313 = Web 1674378470 = SQL Database #> $editions = @{"Enterprise" = 10; "Developer" = 10; "Evaluation" = 10; "Standard" = 5; "Express" = 1} $notesCanMigrate = "Database can be migrated." $notesCannotMigrate = "Database cannot be migrated." } PROCESS { # Convert from RuntimeDefinedParameter object to regular array $databases = $psboundparameters.Databases if ($pipedatabase.Length -gt 0) { $Source = $pipedatabase[0].parent.name $databases = $pipedatabase.name } Write-Output "Attempting to connect to Sql Servers.." $sourceserver = Connect-SqlServer -SqlServer $Source -SqlCredential $SourceSqlCredential $destserver = Connect-SqlServer -SqlServer $Destination -SqlCredential $DestinationSqlCredential if ($databases.Count -eq 0) { $databases = $sourceserver.Databases | Where-Object {$_.isSystemObject -eq 0} | Select-Object Name, Status } if ($databases.Count -gt 0) { if ($databases -contains "master" -or $databases -contains "msdb" -or $databases -contains "tempdb") { throw "Migrating system databases is not currently supported." } if ($sourceserver.versionMajor -lt 9 -and $destserver.versionMajor -gt 10) { throw "Sql Server 2000 databases cannot be migrated to Sql Server versions 2012 and above. Quitting." } if ($sourceserver.collation -ne $destserver.collation) { Write-Warning "Collation on $Source, $($sourceserver.collation) differs from the $Destination, $($destserver.collation)." } if ($sourceserver.versionMajor -gt $destserver.versionMajor) { #indicate that must use 'Generate Scripts' and 'Export Data' options? throw "You can't migrate databases from a higher version to a lower one. Quitting." } if ($sourceserver.versionMajor -lt 10) { throw "This function does not support versions lower than SQL Server 2008 (v10)" } #if editions differs, from higher to lower one, verify the sys.dm_db_persisted_sku_features - only available from SQL 2008 + if (($sourceserver.versionMajor -ge 10 -and $destserver.versionMajor -ge 10)) { foreach ($db in $databases) { if ([string]::IsNullOrEmpty($db.Status)) { $dbstatus = ($sourceserver.Databases | Where-Object {$_.Name -eq $db}).Status.ToString() $dbName = $db } else { $dbstatus = $db.Status.ToString() $dbName = $db.Name } Write-Verbose "Checking database: '$dbName'" if ($dbstatus.Contains("Offline") -eq $false) { [long]$destVersionNumber = $($destserver.VersionString).Replace(".", "") [string]$SourceVersion = "$($sourceServer.Edition) $($sourceServer.ProductLevel) ($($sourceserver.Version))" [string]$DestinationVersion = "$($destserver.Edition) $($destserver.ProductLevel) ($($destserver.Version))" [string]$dbFeatures = "" try { $sql = "SELECT feature_name FROM sys.dm_db_persisted_sku_features" $skufeatures = $sourceServer.Databases[$dbName].ExecuteWithResults($sql) Write-Verbose "Checking features in use..." if ($skufeatures.Tables[0].Rows.Count -gt 0) { foreach ($row in $skufeatures.Tables[0].Rows) { $dbFeatures += ",$($row["feature_name"])" } $dbFeatures = $dbFeatures.TrimStart(",") } } catch { Write-Warning "Can't execute SQL on $sourceserver. `r`n $($_)" Continue } #If SQL Server 2016 SP1 (13.0.4001.0) or higher if ($destVersionNumber -ge 13040010) { <# Need to verify if Edition = EXPRESS and database uses 'Change Data Capture' (CDC) This means that database cannot be migrated because Express edition don't have SQL Server Agent #> if ($editions.Item($destserver.Edition.ToString().Split(" ")[0]) -eq 1 -and $dbFeatures.Contains("ChangeCapture")) { [pscustomobject]@{ SourceInstance = $sourceserver.Name DestinationInstance = $destserver.Name SourceVersion = $SourceVersion DestinationVersion = $DestinationVersion Database = $dbName FeaturesInUse = $dbFeatures Notes = "$notesCannotMigrate. Destination server edition is EXPRESS which does not support 'ChangeCapture' feature that is in use." } } else { [pscustomobject]@{ SourceInstance = $sourceserver.Name DestinationInstance = $destserver.Name SourceVersion = $SourceVersion DestinationVersion = $DestinationVersion Database = $dbName FeaturesInUse = $dbFeatures Notes = $notesCanMigrate } } } #Version is lower than SQL Server 2016 SP1 else { Write-Verbose "Source Server Edition: $($sourceserver.Edition) (Weight: $($editions.Item($sourceserver.Edition.ToString().Split(" ")[0])))" Write-Verbose "Destination Server Edition: $($destserver.Edition) (Weight: $($editions.Item($destserver.Edition.ToString().Split(" ")[0])))" #Check for editions. If destination edition is lower than source edition and exists features in use if (($editions.Item($destserver.Edition.ToString().Split(" ")[0]) -lt $editions.Item($sourceserver.Edition.ToString().Split(" ")[0])) -and (!([string]::IsNullOrEmpty($dbFeatures)))) { [pscustomobject]@{ SourceInstance = $sourceserver.Name DestinationInstance = $destserver.Name SourceVersion = $SourceVersion DestinationVersion = $DestinationVersion Database = $dbName FeaturesInUse = $dbFeatures Notes = "$notesCannotMigrate There are features in use not available on destination instance." } } # else { [pscustomobject]@{ SourceInstance = $sourceserver.Name DestinationInstance = $destserver.Name SourceVersion = $SourceVersion DestinationVersion = $DestinationVersion Database = $dbName FeaturesInUse = $dbFeatures Notes = $notesCanMigrate } } } } else { Write-Warning "Database '$dbName' is offline. Bring database online and re-run the command" } } } else { #SQL Server 2005 or under Write-Warning "This validation will not be made on versions lower than SQL Server 2008 (v10)" Write-Verbose "Source server version: $($sourceserver.versionMajor)" Write-Verbose "Destination server version: $($destserver.versionMajor)" } } else { Write-Output "There are no databases to validate." } } END { $sourceserver.ConnectionContext.Disconnect() $destserver.ConnectionContext.Disconnect() } } |