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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.

Install via PyPI:

```
pip install pypaimon-rust
```

If you want to use the native Python DataFusion `SessionContext`, install `datafusion` as well.

## Query Paimon Tables with DataFusion

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",
})

# DDL
ctx.sql("CREATE SCHEMA paimon.my_db")
ctx.sql("CREATE TABLE paimon.my_db.users (id INT, name STRING, PRIMARY KEY (id))")

# DML
ctx.sql("INSERT INTO paimon.my_db.users VALUES (1, 'alice'), (2, 'bob')")

# Query tables via SQL (catalog.database.table)
batches = ctx.sql("SELECT * FROM paimon.my_db.users")
```

Alternatively, if you want to use the native Python DataFusion `SessionContext`,
install `datafusion` and register a `PaimonCatalog`:

```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)

# Query tables via SQL (catalog.database.table)
df = ctx.sql("SELECT * FROM paimon.default.my_table LIMIT 10")
df.show()
```

### REST Catalog

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

catalog = PaimonCatalog({
    "metastore": "rest",
    "uri": "http://localhost:8080",
    "warehouse": "my_warehouse",
})

ctx = SessionContext()
ctx.register_catalog_provider("paimon", catalog)
```

Time travel queries are not supported in the Python binding at this time.