internal/Update-SqlDbReadOnly.ps1

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Function Update-SqlDbReadOnly
{
<#
.SYNOPSIS
Internal function. Updates specified database to read-only or read-write. Necessary because SMO doesn't appear to support NO_WAIT.
#>

    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [Alias("ServerInstance", "SqlInstance")]
        [object]$SqlServer,
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$dbname,
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [bool]$readonly
    )
    
    if ($readonly)
    {
        $sql = "ALTER DATABASE [$dbname] SET READ_ONLY WITH NO_WAIT"
    }
    else
    {
        $sql = "ALTER DATABASE [$dbname] SET READ_WRITE WITH NO_WAIT"
    }
    
    try
    {
        $server = Connect-SqlServer -SqlServer $SqlServer -SqlCredential $SqlCredential
        $null = $server.ConnectionContext.ExecuteNonQuery($sql)
        Write-Output "Changed ReadOnly status to $readonly for $dbname on $($server.name)"
        return $true
    }
    catch
    {
        Write-Error "Could not change readonly status for $dbname on $($server.name)"
        return $false
    }
}