YDB Dialect for SQLAlchemy

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This repository contains YQL dialect for SqlAlchemy 2.0.

Note: Dialect also works with SqlAlchemy 1.4, but it is not fully tested.

Installation

To work with current ydb-sqlalchemy version clone this repo and run from source root:

$ pip install -U .

Getting started

Connect to local YDB using SqlAlchemy:

import sqlalchemy as sa


engine = sa.create_engine("yql+ydb://localhost:2136/local")

with engine.connect() as conn:
  rs = conn.execute(sa.text("SELECT 1 AS value"))
  print(rs.fetchone())

To setup alembic to work with YDB please check this example.

Development

Run Tests:

Run the command from the root directory of the repository to start YDB in a local docker container.

$ docker-compose up

To run all tests execute the command from the root directory of the repository:

$ tox -e test-all

Run specific test:

$ tox -e test -- test/test_core.py

Check code style:

$ tox -e style

Reformat code:

$ tox -e isort
$ tox -e black-format

Run example (needs running local YDB):

$ python -m pip install virtualenv
$ virtualenv venv
$ source venv/bin/activate
$ pip install -r requirements.txt
$ python examples/example.py