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# PyPaimon Rust

This project builds the Rust-powered core for [PyPaimon](https://paimon.apache.org/docs/master/pypaimon/overview/) while also providing DataFusion integration for querying Paimon tables.

## Usage

The recommended way to query Paimon tables is through `SQLContext`, which supports
multi-catalog registration, DDL, DML, and all Paimon-specific SQL extensions:

```python
from pypaimon_rust.datafusion import SQLContext

ctx = SQLContext()
ctx.register_catalog("paimon", {"warehouse": "/path/to/warehouse"})

batches = ctx.sql("SELECT * FROM paimon.default.my_table")
```

Alternatively, you can register a `PaimonCatalog` into DataFusion's native `SessionContext`:

```python
from datafusion import SessionContext
from pypaimon_rust.datafusion import PaimonCatalog

catalog = PaimonCatalog({"warehouse": "/path/to/warehouse"})
ctx = SessionContext()
ctx.register_catalog_provider("paimon", catalog)

df = ctx.sql("SELECT * FROM paimon.default.my_table")
df.show()
```

## Setup

Install [uv](https://docs.astral.sh/uv/getting-started/installation/):

```shell
pip install uv
```

Set up the development environment:

```shell
make install
```

## Build

```shell
make build
```

## Test

Python integration tests expect the shared Paimon test warehouse to be prepared
first from the repository root:

```shell
make docker-up
cd bindings/python
```

```shell
make test
```````