Repository URL to install this package:
Metadata-Version: 2.1
Name: adbc-driver-postgresql
Version: 1.4.0
Summary: A libpq-based ADBC driver for working with PostgreSQL.
Author-email: Apache Arrow Developers <dev@arrow.apache.org>
License: Apache-2.0
Project-URL: homepage, https://arrow.apache.org/adbc/
Project-URL: repository, https://github.com/apache/arrow-adbc
Requires-Python: >=3.9
Description-Content-Type: text/markdown
License-File: LICENSE.txt
License-File: NOTICE.txt
Requires-Dist: adbc-driver-manager
Requires-Dist: importlib-resources >=1.3
Provides-Extra: dbapi
Requires-Dist: pandas ; extra == 'dbapi'
Requires-Dist: pyarrow >=8.0.0 ; extra == 'dbapi'
Provides-Extra: test
Requires-Dist: pandas ; extra == 'test'
Requires-Dist: polars ; extra == 'test'
Requires-Dist: pyarrow >=8.0.0 ; extra == 'test'
Requires-Dist: pytest ; extra == 'test'
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# ADBC PostgreSQL Driver for Python
This package contains bindings for the [PostgreSQL driver][postgresql], using
the [driver manager][driver-manager] to provide a [DBAPI 2.0/PEP
249-compatible][dbapi] interface on top.
[dbapi]: https://peps.python.org/pep-0249/
[driver-manager]: https://arrow.apache.org/adbc/current/python/driver_manager.html
[postgresql]: https://arrow.apache.org/adbc/current/driver/postgresql.html
## Example
```python
import adbc_driver_postgresql.dbapi
uri = "postgresql://postgres:password@localhost:5432/postgres"
with adbc_driver_postgresql.dbapi.connect(uri) as conn:
with conn.cursor() as cur:
cur.execute("SELECT 1")
print(cur.fetch_arrow_table())
```
## Building
Dependencies: a build of the PostgreSQL driver, and the
`adbc-driver-manager` Python package. Optionally, install PyArrow to
use the DBAPI 2.0-compatible interface.
Set the environment variable `ADBC_POSTGRESQL_LIBRARY` to the path to
`libadbc_driver_postgresql.{dll,dylib,so}` before running `pip install`.
```
# If not already installed
pip install -e ../adbc_driver_manager
export ADBC_POSTGRESQL_LIBRARY=/path/to/libadbc_driver_postgresql.so
pip install --no-deps -e .
```
For users building from the arrow-adbc source repository, you can alternately use CMake to manage library dependencies and set environment variables for you. Assuming you specify ``-DADBC_DRIVER_POSTGRESQL=ON`` you can also add ``-DADBC_BUILD_PYTHON=ON`` to define a ``python`` target.
For example, assuming you run cmake from the project root:
```shell
cmake -S c -B build --preset debug -DADBC_BUILD_PYTHON=ON -DADBC_DRIVER_POSTSGRESQL=ON
cmake --build build --target python
```
will properly build and install the Python library for you.
See [CONTRIBUTING.md](../../CONTRIBUTING.md) for details on the
general build process.
## Testing
A running instance of PostgreSQL is required. For example, using Docker:
```shell
$ docker run -it --rm \
-e POSTGRES_PASSWORD=password \
-e POSTGRES_DB=tempdb \
-p 5432:5432 \
postgres
```
Then, to run the tests, set the environment variable specifying the
PostgreSQL URI before running tests:
```shell
$ export ADBC_POSTGRESQL_TEST_URI=postgresql://localhost:5432/postgres?user=postgres&password=password
$ pytest -vvx
```
See [CONTRIBUTING.md](../../CONTRIBUTING.md) for details on the
general test process.