Duckit 0.1.1

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 
dotnet add package Duckit --version 0.1.1
                    


                    

                
NuGet\Install-Package Duckit -Version 0.1.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Duckit" Version="0.1.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Duckit" Version="0.1.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Duckit" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Duckit --version 0.1.1
                    


                    

                
#r "nuget: Duckit, 0.1.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Duckit@0.1.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Duckit&version=0.1.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Duckit&version=0.1.1
                    


                            Install as a Cake Tool

Duckit

Strongly-typed access to Parquet files via DuckDB with LINQ query support.

Features

  • Build-time code generation from Parquet schemas - no manual POCOs required
  • LINQ queries translated to parameterized DuckDB SQL
  • Type-safe compile-time validation of queries
  • Bring Your Own Types - use existing domain models with attribute mapping

Installation

dotnet add package Duckit

Quick Start

Option 1: Code Generation from Parquet

  1. Create a duckit.json next to your .csproj:
{
  "namespace": "MyApp.Data",
  "datasets": [
    { "name": "Orders", "path": "data/orders.parquet", "rowType": "OrderRow" },
    { "name": "Customers", "path": "data/customers.parquet", "rowType": "CustomerRow" }
  ]
}
  1. Build your project - types are generated automatically:
using var duck = DuckSession.OpenInMemory();

var results = await duck.Orders()
    .Where(o => o.Total > 50m && o.Country == "GB")
    .OrderByDescending(o => o.Total)
    .Take(10)
    .ToListAsync();

Option 2: Bring Your Own Types

Define your types with [DuckColumn] attributes:

public record OrderRow
{
    [DuckColumn("order_id")] public long OrderId { get; init; }
    [DuckColumn("total")] public decimal Total { get; init; }
    [DuckColumn("country")] public string? Country { get; init; }
}

using var duck = DuckSession.OpenInMemory();
var orders = duck.ReadParquet<OrderRow>("data/orders.parquet");

var results = await orders
    .Where(o => o.Total > 100)
    .ToListAsync();

Or embed the path in the type:

[DuckTable("data/orders.parquet")]
public record OrderRow
{
    [DuckColumn("order_id")] public long OrderId { get; init; }
    [DuckColumn("total")] public decimal Total { get; init; }
}

var orders = duck.Table<OrderRow>();

Supported LINQ Operations

  • Where - filtering
  • Select - projection
  • OrderBy / OrderByDescending / ThenBy / ThenByDescending - sorting
  • Take / Skip - pagination
  • First / FirstOrDefault / Single / SingleOrDefault
  • Count / Any
  • ToList / ToArray (with async variants)

Type Mapping

DuckDB Type C# Type
BOOLEAN bool / bool?
INTEGER int / int?
BIGINT long / long?
DOUBLE double / double?
DECIMAL decimal / decimal?
VARCHAR string / string?
DATE DateOnly / DateOnly?
TIMESTAMP DateTime / DateTime?

License

MIT

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
0.1.1 88 1/21/2026
0.1.0 81 1/21/2026
0.1.0-ci.2 40 1/21/2026