Skip to content
Language SDKs

Workers in your language.

One wire protocol, multiple implementations. Every SDK interoperates over the same Apache Arrow IPC format.

Get started → Architecture →

Every implementation speaks the same wire protocol, so a DuckDB session can attach workers written in different languages in the same query. Pick the one your team already runs.

C#

Worker feature parity

Build VGI workers for .NET 10 with QueryFarm.Vgi. All five function shapes, catalogs, optimizer integration, settings, secrets, COPY formats, caching, and a cross-language RPC client.

Install

dotnet add package QueryFarm.Vgi --version 0.3.0
Docs → RPC layer → GitHub

Go

Feature parity

Build single-binary VGI workers in Go on Apache Arrow. Includes HTTP serving, OpenTelemetry, dispatch hooks, external storage, and checksummed payloads.

Install

go get github.com/Query-farm/vgi-go/vgi
Docs → RPC layer → GitHub

Java

Feature parity

Build VGI workers on JDK 25+ with farm.query:vgi. Annotation-driven functions, catalogs, HTTP, and a shared-memory side channel.

Install

# Gradle (Kotlin DSL), JDK 25+:
implementation("farm.query:vgi:0.27.0")
Docs → RPC layer → GitHub

Python

Reference implementation

Build VGI workers in Python — the reference implementation, with strict typing, every transport, streaming, introspection, shared memory, and OpenTelemetry. The vgi package is the worker framework; vgi-rpc is its transport layer.

Install

pip install vgi-python
# or: uv add vgi-python
Docs → RPC layer → GitHub

Rust

Feature parity

Build VGI workers in Rust with tight memory control and wire-level compatibility. Optional HTTP, JWT, OAuth-PKCE, mTLS, OpenTelemetry, and Sentry features.

Install

cargo add vgi
Docs → RPC layer → GitHub

TypeScript

Feature parity

Build fully typed VGI workers for Bun, Node.js, and Deno. Includes HTTP server/client, OpenTelemetry, dispatch hooks, external storage, and checksummed payloads.

Install

npm install @query-farm/vgi
# or: bun add @query-farm/vgi
Docs → RPC layer → GitHub
Don't see your language?

VGI is a protocol — anyone can implement it

The wire format is Apache Arrow IPC over a pluggable transport. If your language has Arrow bindings (R, Julia, …) it can speak VGI. The full byte-level wire-protocol spec documents the exact format.

Working on a port? Get in touch — we're happy to help, and to list it here.

Expert help

Need a custom worker built?

We build VGI workers and DuckDB extensions for clients across stacks — pick the language, we'll ship the worker.

Consulting Schedule a call