functions/Get-DbaRestoreHistory.ps1

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Function Get-DbaRestoreHistory
{
<#
.SYNOPSIS
Returns restore history details for databases on a SQL Server
  
.DESCRIPTION
By default, this command will return the server name, database, username, restore type, date, from file and to files.
 
Thanks to https://www.mssqltips.com/SqlInstancetip/1724/when-was-the-last-time-your-sql-server-database-was-restored/ for the query and https://sqlstudies.com/2016/07/27/when-was-this-database-restored/ for the idea.
  
.PARAMETER SqlInstance
The SQL Server that you're connecting to.
 
.PARAMETER SqlCredential
Credential object used to connect to the SQL Server as a different user
 
.PARAMETER Database
The database(s) to process - this list is auto-populated from the server. If unspecified, all databases will be processed.
 
.PARAMETER ExcludeDatabase
The database(s) to exclude - this list is auto-populated from the server
 
.PARAMETER Since
Datetime object used to narrow the results to a date
  
.PARAMETER Force
Returns a ton of information about the backup history with no max rows
 
.PARAMETER Last
Returns the last restore action performed on each specified database
 
.NOTES
Tags: DisasterRecovery, Backup, Restore, Databases
 
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/Get-DbaRestoreHistory
 
.EXAMPLE
Get-DbaRestoreHistory -SqlInstance sql2016
 
Returns server name, database, username, restore type, date for all restored databases on sql2016.
 
.EXAMPLE
Get-DbaRestoreHistory -SqlInstance sql2016 -Database db1, db2 -Since '7/1/2016 10:47:00'
 
Returns restore information only for databases db1 and db2 on sqlserve2014a since July 1, 2016 at 10:47 AM.
  
.EXAMPLE
Get-DbaRestoreHistory -SqlInstance sql2016, sql2016 -Exclude db1
 
Lots of detailed information for all databases except db1 on sql2016 and sql2016
 
.EXAMPLE
Get-DbaRestoreHistory -SqlInstance sql2014 -Database AdventureWorks2014, pubs | Format-Table
 
Adds From and To file information to output, returns information only for AdventureWorks2014 and pubs, and makes the output pretty
 
.EXAMPLE
Get-DbaRegisteredServerName -SqlInstance sql2016 | Get-DbaRestoreHistory
 
Returns database restore information for every database on every server listed in the Central Management Server on sql2016
  
#>

    [CmdletBinding()]
    Param (
        [parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter[]]$SqlInstance,
        [Alias("Credential")]
        [PSCredential]
        $SqlCredential,
        [Alias("Databases")]
        [object[]]$Database,
        [object[]]$ExcludeDatabase,
        [datetime]$Since,
        [switch]$Force,
        [switch]$Last
    )
    
    begin
    {        
        if ($Since -ne $null)
        {
            $Since = $Since.ToString("yyyy-MM-dd HH:mm:ss")
        }
    }
    
    process
    {
        foreach ($instance in $SqlInstance)
        {
            try
            {
                $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential
                
                if ($server.VersionMajor -lt 9)
                {
                    Write-Warning "SQL Server 2000 not supported"
                    continue
                }
                
                $computername = $server.NetName
                $instancename = $server.ServiceName
                $servername = $server.DomainInstanceName
                
                if ($force -eq $true)
                {
                    $select = "SELECT '$computername' AS [ComputerName],
     '$instancename' AS [InstanceName],
     '$servername' AS [SqlInstance], * "

                }
                else
                {
                    $select = "SELECT
     '$computername' AS [ComputerName],
     '$instancename' AS [InstanceName],
     '$servername' AS [SqlInstance],
      rsh.destination_database_name AS [Database],
      --rsh.restore_history_id as RestoreHistoryID,
      rsh.user_name AS [Username],
      CASE
       WHEN rsh.restore_type = 'D' THEN 'Database'
       WHEN rsh.restore_type = 'F' THEN 'File'
       WHEN rsh.restore_type = 'G' THEN 'Filegroup'
       WHEN rsh.restore_type = 'I' THEN 'Differential'
       WHEN rsh.restore_type = 'L' THEN 'Log'
       WHEN rsh.restore_type = 'V' THEN 'Verifyonly'
       WHEN rsh.restore_type = 'R' THEN 'Revert'
       ELSE rsh.restore_type
      END AS [RestoreType],
      rsh.restore_date AS [Date],
      ISNULL(STUFF((SELECT ', ' + bmf.physical_device_name
         FROM msdb.dbo.backupmediafamily bmf
           WHERE bmf.media_set_id = bs.media_set_id
         FOR XML PATH('')), 1, 2, ''), '') AS [From],
      ISNULL(STUFF((SELECT ', ' + rf.destination_phys_name
         FROM msdb.dbo.restorefile rf
           WHERE rsh.restore_history_id = rf.restore_history_id
         FOR XML PATH('')), 1, 2, ''), '') AS [To],
     bs.first_lsn,
     bs.last_lsn,
     bs.checkpoint_lsn,
     bs.database_backup_lsn
      "

                }
                
                $from = " FROM msdb.dbo.restorehistory rsh
     INNER JOIN msdb.dbo.backupset bs ON rsh.backup_set_id = bs.backup_set_id"

                
                if ($ExcludeDatabase -or $Database -or $Since -or $last)
                {
                    $where = " WHERE "
                }
                
                $wherearray = @()
                
                if ($ExcludeDatabase)
                {
                    $dblist = $ExcludeDatabase -join "','"
                    $wherearray += " destination_database_name not in ('$dblist')"
                }
                
                if ($Database)
                {
                    $dblist = $Database -join "','"
                    $wherearray += "destination_database_name in ('$dblist')"
                }
                
                if ($Since -ne $null)
                {
                    $wherearray += "rsh.restore_date >= '$since'"
                }
                

                if ($last)
                {
                    $wherearray += "rsh.backup_set_id in
      (select max(backup_set_id) from msdb.dbo.restorehistory
      group by destination_database_name
      )"

                }

                if ($where.length -gt 0)
                {
                    $wherearray = $wherearray -join " and "
                    $where = "$where $wherearray"
                }
                
                $sql = "$select $from $where"
                
                Write-Debug $sql
                
                $results = $server.ConnectionContext.ExecuteWithResults($sql).Tables.Rows 

                if ($last)
                {
                    $ga = $results | group-Object database
                    $tmpres = @()    
                    $ga | foreach-Object {
                        $tmpres += $_.Group | SORT-OBJECT RESTORE_DATE -Descending | SELECT * -first 1 
                    }
                    $results = $tmpres
                }
                $results | Select-DefaultView -Exclude first_lsn,last_lsn,checkpoint_lsn,database_backup_lsn,RowError,RowState,Table,ItemArray,HasErrors
            }
            catch
            {
                Write-Warning $_
                Write-Exception $_
                continue
            }
        }
    }
}