haybarn 1.5.4rc1

Haybarn in-process database, powered by DuckDB

Haybarn — Python client

The Python client for Haybarn, an independent derived distribution of DuckDB, powered by DuckDB.

Published by Query Farm LLC.

Haybarn is not affiliated with, sponsored by, or endorsed by the DuckDB Foundation or DuckDB Labs. DuckDB is a trademark of the DuckDB Foundation. See NOTICE.

This package is a fork of the DuckDB Python client, rebranded as haybarn. The public API is identical to DuckDB's.

Installation

pip install haybarn

Usage

import haybarn

haybarn.sql("SELECT 42").show()

Migrating from DuckDB

Because the API is identical, existing DuckDB code needs only a one-line change:

import haybarn as duckdb   # the rest of your code is unchanged

For third-party code you cannot edit, there is an opt-in compatibility shim that makes import duckdb resolve to Haybarn:

import haybarn.compat   # registers haybarn as the `duckdb` module
import duckdb           # now this is Haybarn

The compiled extension module is renamed (_haybarn), so a haybarn wheel and a genuine duckdb wheel can be installed side by side without conflict.

Building from source

See CLAUDE.md for the build workflow. In short:

uv sync --only-group build --no-install-project
uv sync --no-build-isolation -v --reinstall

The DuckDB engine is built from the external/duckdb submodule.

License

MIT — the same license as DuckDB. The upstream license is preserved in LICENSE; see NOTICE for the list of Haybarn modifications and trademark attribution.