functions/Get-DbaBackupHistory.ps1

Function Get-DbaBackupHistory
{
<#
.SYNOPSIS
Returns backup history details for databases on a SQL Server
     
.DESCRIPTION
Returns backup history details for some or all databases on a SQL Server.
 
You can even get detailed information (including file path) for latest full, differential and log files.
     
Reference: http://www.sqlhub.com/2011/07/find-your-backup-history-in-sql-server.html
     
.PARAMETER SqlServer
The SQL Server that you're connecting to.
 
.PARAMETER Credential
Credential object used to connect to the SQL Server as a different user
 
.PARAMETER Databases
Return backup information for only specific databases. These are only the databases that currently exist on the server.
     
.PARAMETER Since
Datetime object used to narrow the results to a date
     
.PARAMETER Force
Returns a boatload of information, the way SQL Server returns it
 
.PARAMETER Last
Returns last full, diff and log backup sets
 
.PARAMETER LastFull
Returns last full backup set
 
.PARAMETER LastDiff
Returns last differential backup set
 
.PARAMETER LastLog
Returns last log backup set
 
.PARAMETER IgnoreCopyOnly
If set, Get-DbaBackupHistory will ignore CopyOnly backups
 
.PARAMETER Raw
By default the command will group mediasets (striped backups across multiple files) into a single return object. If you'd prefer to have an object per backp file returned, use this switch
 
.NOTES
Tags: Storage, DisasterRecovery, Backup
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/Get-DbaBackupHistory
 
.EXAMPLE
Get-DbaBackupHistory -SqlServer sqlserver2014a
 
Returns server name, database, username, backup type, date for all backups databases on sqlserver2014a. This may return a ton of rows; consider using filters that are included in other examples.
 
.EXAMPLE
$cred = Get-Credential sqladmin
Get-DbaBackupHistory -SqlServer sqlserver2014a -SqlCredential $cred
 
Does the same as above but logs in as SQL user "sqladmin"
 
.EXAMPLE
Get-DbaBackupHistory -SqlServer sqlserver2014a -Databases db1, db2 -Since '7/1/2016 10:47:00'
 
Returns backup information only for databases db1 and db2 on sqlserve2014a since July 1, 2016 at 10:47 AM.
 
.EXAMPLE
Get-DbaBackupHistory -SqlServer sql2014 -Databases AdventureWorks2014, pubs -Force | Format-Table
 
Returns information only for AdventureWorks2014 and pubs, and makes the output pretty
 
.EXAMPLE
Get-DbaBackupHistory -SqlServer sql2014 -Databases AdventureWorks2014 -Last
 
Returns information about the most recent full, differential and log backups for AdventureWorks2014 on sql2014
     
.EXAMPLE
Get-DbaBackupHistory -SqlServer sql2014 -Databases AdventureWorks2014 -LastFull
 
Returns information about the most recent full backup for AdventureWorks2014 on sql2014
     
.EXAMPLE
Get-SqlRegisteredServerName -SqlServer sql2016 | Get-DbaBackupHistory
 
Returns database backup information for every database on every server listed in the Central Management Server on sql2016
     
.EXAMPLE
Get-DbaBackupHistory -SqlServer sqlserver2014a, sql2016 -Force
 
Lots of detailed information for all databases on sqlserver2014a and sql2016.
     
#>

    [CmdletBinding(DefaultParameterSetName = "Default")]
    Param (
        [parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Alias("ServerInstance", "SqlInstance")]
        [object[]]$SqlServer,
        [Alias("SqlCredential")]
        [PsCredential]$Credential,
        [switch]$IgnoreCopyOnly,
        [Parameter(ParameterSetName = "NoLast")]
        [switch]$Force,
        [Parameter(ParameterSetName = "NoLast")]
        [datetime]$Since,
        [Parameter(ParameterSetName = "Last")]
        [switch]$Last,
        [Parameter(ParameterSetName = "Last")]
        [switch]$LastFull,
        [Parameter(ParameterSetName = "Last")]
        [switch]$LastDiff,
        [Parameter(ParameterSetName = "Last")]
        [switch]$LastLog,
        [switch]$raw
    )
    
    DynamicParam { if ($SqlServer) { return Get-ParamSqlDatabases -SqlServer $SqlServer[0] -SqlCredential $Credential } }
    
    BEGIN
    {
        $FunctionName = $FunctionName = (Get-PSCallstack)[0].Command
        if ($Since -ne $null)
        {
            $Since = $Since.ToString("yyyy-MM-dd HH:mm:ss")
        }
    }
    
    PROCESS
    {
        $databases = $psboundparameters.Databases
        foreach ($instance in $SqlServer)
        {
            try
            {
                Write-Verbose "$FunctionName - Connecting to $instance"
                $server = Connect-SqlServer -SqlServer $instance -SqlCredential $Credential
                
                if ($server.VersionMajor -lt 9)
                {
                    Write-Warning "$FunctionName - SQL Server 2000 not supported"
                    continue
                }
                $BackupSizeColumn = 'backup_size'
                if ($server.VersionMajor -ge 10)
                {
                    # 2008 introduced compressed_backup_size
                    $BackupSizeColumn = 'compressed_backup_size'
                }
                
                if ($last)
                {
                    if ($databases -eq $null) { $databases = $server.databases.name }
                    Get-DbaBackupHistory -SqlServer $server -LastFull -Databases $databases -raw:$raw
                    Get-DbaBackupHistory -SqlServer $server -LastDiff -Databases $databases -raw:$raw
                    Get-DbaBackupHistory -SqlServer $server -LastLog -Databases $databases -raw:$raw
                }
                elseif ($LastFull -or $LastDiff -or $LastLog)
                {
                    $sql = @()
                    
                    if ($databases -eq $null) { $databases = $server.databases.name }
                    
                    if ($LastFull) { $first = 'D'; $second = 'P' }
                    if ($LastDiff) { $first = 'I'; $second = 'Q' }
                    if ($LastLog) { $first = 'L'; $second = 'L' }
                    
                    $databases = $databases | Select-Object -Unique
                    foreach ($database in $databases)
                    {
                        Write-Verbose "$FunctionName - Processing $database"
                        
                        $sql += "SELECT
                                  a.BackupSetRank,
                                  a.Server,
                                  a.[Database],
                                  a.Username,
                                  a.Start,
                                  a.[End],
                                  a.Duration,
                                  a.[Path],
                                  a.Type,
                                  a.TotalSizeMB,
                                  a.MediaSetId,
                                  a.Software
                                FROM (SELECT
                                  RANK() OVER (ORDER BY backupset.backup_start_date DESC) AS 'BackupSetRank',
                                  backupset.database_name AS [Database],
                                  backupset.user_name AS Username,
                                  backupset.backup_start_date AS Start,
                                  backupset.server_name as [server],
                                  backupset.backup_finish_date AS [End],
                                  CAST(DATEDIFF(SECOND, backupset.backup_start_date, backupset.backup_finish_date) AS varchar(4)) + ' ' + 'Seconds' AS Duration,
                                  mediafamily.physical_device_name AS Path,
                                  CAST(backupset.$BackupSizeColumn / 1048576 AS numeric(10, 2)) AS TotalSizeMB,
                                  CASE backupset.type
                                    WHEN 'L' THEN 'Log'
                                    WHEN 'D' THEN 'Full'
                                    WHEN 'F' THEN 'File'
                                    WHEN 'I' THEN 'Differential'
                                    WHEN 'G' THEN 'Differential File'
                                    WHEN 'P' THEN 'Partial Full'
                                    WHEN 'Q' THEN 'Partial Differential'
                                    ELSE NULL
                                  END AS Type,
                                  backupset.media_set_id AS MediaSetId,
                                  mediafamily.media_family_id as mediafamilyid,
                                     backupset.backup_set_id as backupsetid,
                                  CASE mediafamily.device_type
                                    WHEN 2 THEN 'Disk'
                                    WHEN 102 THEN 'Permanent Disk Device'
                                    WHEN 5 THEN 'Tape'
                                    WHEN 105 THEN 'Permanent Tape Device'
                                    WHEN 6 THEN 'Pipe'
                                    WHEN 106 THEN 'Permanent Pipe Device'
                                    WHEN 7 THEN 'Virtual Device'
                                    ELSE 'Unknown'
                                  END AS DeviceType,
                                  mediaset.software_name AS Software
                                FROM msdb..backupmediafamily AS mediafamily
                                INNER JOIN msdb..backupmediaset AS mediaset
                                  ON mediafamily.media_set_id = mediaset.media_set_id
                                INNER JOIN msdb..backupset AS backupset
                                  ON backupset.media_set_id = mediaset.media_set_id
                                WHERE backupset.database_name = '$database'
                                AND (type = '$first'
                                OR type = '$second')) AS a
                                WHERE a.BackupSetRank = 1
                                ORDER BY a.Type;"

                    }
                    
                    $sql = $sql -join "; "
                }
                else
                {
                    if ($Force -eq $true)
                    {
                        $select = "SELECT * "
                    }
                    else
                    {
                        $select = "SELECT
                                      backupset.database_name AS [Database],
                                      backupset.user_name AS Username,
                                      backupset.server_name as [server],
                                      backupset.backup_start_date AS [Start],
                                      backupset.backup_finish_date AS [End],
                                      CAST(DATEDIFF(SECOND, backupset.backup_start_date, backupset.backup_finish_date) AS varchar(4)) + ' ' + 'Seconds' AS Duration,
                                      mediafamily.physical_device_name AS Path,
                                      CAST((backupset.$BackupSizeColumn / 1048576) AS numeric(10, 2)) AS TotalSizeMB,
                                      CASE backupset.type
                                        WHEN 'L' THEN 'Log'
                                        WHEN 'D' THEN 'Full'
                                        WHEN 'F' THEN 'File'
                                        WHEN 'I' THEN 'Differential'
                                        WHEN 'G' THEN 'Differential File'
                                        WHEN 'P' THEN 'Partial Full'
                                        WHEN 'Q' THEN 'Partial Differential'
                                        ELSE NULL
                                      END AS Type,
                                      backupset.media_set_id AS MediaSetId,
                                      mediafamily.media_family_id as mediafamilyid,
                                         backupset.backup_set_id as backupsetid,
                                      CASE mediafamily.device_type
                                        WHEN 2 THEN 'Disk'
                                        WHEN 102 THEN 'Permanent Disk Device'
                                        WHEN 5 THEN 'Tape'
                                        WHEN 105 THEN 'Permanent Tape Device'
                                        WHEN 6 THEN 'Pipe'
                                        WHEN 106 THEN 'Permanent Pipe Device'
                                        WHEN 7 THEN 'Virtual Device'
                                        ELSE 'Unknown'
                                      END AS DeviceType,
                                      mediaset.software_name AS Software"

                    }
                    
                    $from = " FROM msdb..backupmediafamily mediafamily
                                 INNER JOIN msdb..backupmediaset mediaset ON mediafamily.media_set_id = mediaset.media_set_id
                                 INNER JOIN msdb..backupset backupset ON backupset.media_set_id = mediaset.media_set_id"

                    
                    if ($databases -or $Since -or $Last -or $LastFull -or $LastLog -or $LastDiff -or $IgnoreCopyOnly)
                    {
                        $where = " WHERE "
                    }
                    
                    $wherearray = @()
                    
                    if ($databases.length -gt 0)
                    {
                        $dblist = $databases -join "','"
                        $wherearray += "database_name in ('$dblist')"
                    }
                    
                    if ($Last -or $LastFull -or $LastLog -or $LastDiff)
                    {
                        $tempwhere = $wherearray -join " and "
                        $wherearray += "type = 'Full' and mediaset.media_set_id = (select top 1 mediaset.media_set_id $from $tempwhere order by backupset.backup_finish_date DESC)"
                    }
                    
                    if ($Since -ne $null)
                    {
                        $wherearray += "backupset.backup_finish_date >= '$since'"
                    }

                    if ($IgnoreCopyOnly)
                    {
                        $wherearray += "is_copy_only='0'"    
                    }
                    
                    if ($where.length -gt 0)
                    {
                        $wherearray = $wherearray -join " and "
                        $where = "$where $wherearray"
                    }
                    
                    $sql = "$select $from $where ORDER BY backupset.backup_finish_date DESC"
                }
                
                if (!$last)
                {
                    Write-Debug $sql
                    $results = $server.ConnectionContext.ExecuteWithResults($sql).Tables.Rows | Select-Object * -ExcludeProperty BackupSetRank, RowError, Rowstate, table, itemarray, haserrors
                    if ($raw){
                        write-verbose "$FunctionName - Raw Ouput"
                        $results = $results | Select-Object *, @{Name="FullName";Expression={$_.Path}}
                    }
                    else
                    {    
                        write-verbose "$FunctionName - Grouped output"
                        $GroupedResults  = $results | Group-Object -Property backupsetid
                        $GroupResults = @()
                        foreach ($group in $GroupedResults){
                            $GroupResults += [PSCustomObject]@{
                                ComputerName = $server.NetName
                                InstanceName = $server.ServiceName
                                SqlInstance = $server.DomainInstanceName
                                Database = $group.Group[0].Database
                                UserName = $group.Group[0].UserName
                                Start = ($group.Group.Start | measure-object -Minimum).Minimum
                                End = ($group.Group.End | measure-object -Maximum).Maximum
                                Duration = ($group.Group.Duration | measure-object -Maximum).Maximum
                                Path = $group.Group.Path
                                TotalSizeMb = ($group.group.TotalSizeMb | measure-object  -Sum).sum
                                Type = $group.Group[0].Type
                                BackupSetupId = $group.Group[0].BackupSetId
                                DeviceType = $group.Group[0].DeviceType
                                Software = $group.Group[0].Software
                                FullName =  $group.Group.Path
                                }

                        }
                        $results = $GroupResults | Sort-Object -Property End -Descending
                    }
                    foreach ($result in $results)
                    { 
                        $result | Select-DefaultView -ExcludeProperty FullName
                    }                
                }
            }
            catch
            {
                Write-Warning $_
                Write-Exception $_
                continue
            }
        }
    }
}