Add Import-DbaParquet command

dbatools.psd1

@@ -428,6 +428,7 @@
         'Grant-DbaAgPermission',
         'Export-DbaCsv',
         'Import-DbaCsv',
+        'Import-DbaParquet',
         'Import-DbaPfDataCollectorSetTemplate',
         'Import-DbaRegServer',
         'Import-DbaSpConfigure',
@@ -436,9 +437,10 @@
         'Install-DbaDarlingData',
         'Install-DbaFirstResponderKit',
         'Install-DbaInstance',
-        'Install-DbaMaintenanceSolution',
-        'Install-DbaMultiTool',
-        'Install-DbaSqlPackage',
+        'Install-DbaMaintenanceSolution',
+        'Install-DbaMultiTool',
+        'Install-DbaParquet',
+        'Install-DbaSqlPackage',
         'Install-DbaSqlWatch',
         'Install-DbaWhoIsActive',
         'Invoke-DbaDbAzSqlTip',

dbatools.psm1

@@ -787,6 +787,7 @@ if ($PSVersionTable.PSVersion.Major -lt 5) {
         'Resolve-DbaPath',
         'Export-DbaCsv',
         'Import-DbaCsv',
+        'Import-DbaParquet',
         'Invoke-DbaDbDataMasking',
         'New-DbaDbMaskingConfig',
         'Get-DbaDbccSessionBuffer',
@@ -883,6 +884,7 @@ if ($PSVersionTable.PSVersion.Major -lt 5) {
         'Export-DbaSysDbUserObject',
         'Test-DbaDbQueryStore',
         'Install-DbaMultiTool',
+        'Install-DbaParquet',
         'New-DbaAgentOperator',
         'Remove-DbaAgentOperator',
         'Remove-DbaDbTableData',
@@ -1229,4 +1231,4 @@ Register-DbatoolsConfig'
     }
 }
 
-[Dataplat.Dbatools.dbaSystem.SystemHost]::ModuleImported = $true
+[Dataplat.Dbatools.dbaSystem.SystemHost]::ModuleImported = $true

private/configurations/settings/paths.ps1

@@ -48,6 +48,9 @@ if (-not (Test-Path -Path $script:AppData)) {
 # The default path where dbatools stores persistent data
 Set-DbatoolsConfig -FullName 'Path.DbatoolsData' -Value (Join-DbaPath $script:AppData "PowerShell" "dbatools") -Initialize -Validation string -Handler { } -Description "The path where dbatools stores persistent data on a per user basis."
 
+# The default path where dbatools stores Parquet.NET assemblies
+Set-DbatoolsConfig -FullName 'Path.DbatoolsParquet' -Value (Join-DbaPath $script:AppData "PowerShell" "dbatools" "parquet") -Initialize -Validation string -Handler { } -Description "The path where dbatools stores Parquet.NET assemblies."
+
 # The default path where dbatools stores temporary data
 Set-DbatoolsConfig -FullName 'Path.DbatoolsTemp' -Value $temp -Initialize -Validation string -Handler { } -Description "The path where dbatools stores temporary data."
 
@@ -115,4 +118,4 @@ Set-DbatoolsConfig -FullName 'Path.Managed.Temp' -Value $path_Temp -Initialize -
 Set-DbatoolsConfig -FullName 'Path.Managed.LocalAppData' -Value $path_LocalAppData -Initialize -Validation 'string' -Description "Path pointing at the LocalAppData path. Used with Get-DbatoolsPath."
 Set-DbatoolsConfig -FullName 'Path.Managed.AppData' -Value $path_AppData -Initialize -Validation 'string' -Description "Path pointing at the AppData path. Used with Get-DbatoolsPath."
 Set-DbatoolsConfig -FullName 'Path.Managed.ProgramData' -Value $path_ProgramData -Initialize -Validation 'string' -Description "Path pointing at the ProgramData path. Used with Get-DbatoolsPath."
-#endregion Managed Path Stuff
+#endregion Managed Path Stuff

private/functions/Get-DbaParquetPath.ps1

@@ -0,0 +1,81 @@
+function Get-DbaParquetPath {
+    <#
+    .SYNOPSIS
+        Gets the path to the Parquet.NET assembly.
+
+    .DESCRIPTION
+        Finds the Parquet.NET assembly used by Import-DbaParquet. Checks the currently loaded assembly first,
+        then the dbatools data directory populated by Install-DbaParquet, then the legacy bundled module path.
+
+    .PARAMETER EnableException
+        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
+        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
+        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
+
+    .NOTES
+        Tags: Parquet, Import
+        Author: Jovan Popovic, the dbatools team + Claude
+
+        Website: https://dbatools.io
+        Copyright: (c) 2026 by dbatools, licensed under MIT
+        License: MIT https://opensource.org/licenses/MIT
+
+    .OUTPUTS
+        System.String. The path to the Parquet.NET assembly if found, otherwise $null.
+    #>
+    [CmdletBinding()]
+    param (
+        [switch]$Silent,
+        [switch]$EnableException
+    )
+
+    $loadedAssembly = [System.AppDomain]::CurrentDomain.GetAssemblies() | Where-Object { $_.GetName().Name -eq "Parquet" } | Select-Object -First 1
+    if ($loadedAssembly -and $loadedAssembly.Location -and (Test-Path -Path $loadedAssembly.Location)) {
+        Write-Message -Level Verbose -Message "Found loaded Parquet.NET assembly at: $($loadedAssembly.Location)"
+        return $loadedAssembly.Location
+    }
+
+    $searchPaths = @()
+
+    $configuredPath = Get-DbatoolsConfigValue -FullName "Path.DbatoolsParquet"
+    if ($configuredPath) {
+        $configuredPath = $configuredPath.TrimEnd("/", "\")
+        $searchPaths += Join-Path -Path $configuredPath -ChildPath "Parquet.dll"
+        $searchPaths += Join-Path -Path $configuredPath -ChildPath "Parquet.Net.dll"
+    }
+
+    $dbatoolsData = Get-DbatoolsConfigValue -FullName "Path.DbatoolsData"
+    if ($dbatoolsData) {
+        $dbatoolsData = $dbatoolsData.TrimEnd("/", "\")
+        $searchPaths += Join-Path -Path $dbatoolsData -ChildPath "parquet" | Join-Path -ChildPath "Parquet.dll"
+        $searchPaths += Join-Path -Path $dbatoolsData -ChildPath "parquet" | Join-Path -ChildPath "Parquet.Net.dll"
+    }
+
+    if ($script:PSModuleRoot) {
+        $searchPaths += Join-Path -Path $script:PSModuleRoot -ChildPath "bin" | Join-Path -ChildPath "parquet" | Join-Path -ChildPath "Parquet.dll"
+        $searchPaths += Join-Path -Path $script:PSModuleRoot -ChildPath "bin" | Join-Path -ChildPath "parquet" | Join-Path -ChildPath "Parquet.Net.dll"
+    }
+
+    foreach ($path in $searchPaths) {
+        if (Test-Path -Path $path) {
+            Write-Message -Level Verbose -Message "Found Parquet.NET assembly at: $path"
+            return $path
+        }
+    }
+
+    $message = @"
+Could not find Parquet.NET. Parquet.NET is required for Import-DbaParquet.
+
+To install Parquet.NET, use:
+    Install-DbaParquet
+
+This will download Parquet.NET and its managed dependencies to your dbatools data directory.
+"@
+
+    if ($Silent) {
+        return $null
+    }
+
+    Stop-Function -Message $message -Target "Parquet.NET" -EnableException $EnableException
+    return $null
+}