https://github.com/xzkostyan/clickhouse-sqlalchemy

ClickHouse dialect for SQLAlchemy
https://github.com/xzkostyan/clickhouse-sqlalchemy

clickhouse database dialect sqlalchemy yandex

Last synced: 3 months ago
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ClickHouse dialect for SQLAlchemy

• Host: GitHub
• URL: https://github.com/xzkostyan/clickhouse-sqlalchemy
• Owner: xzkostyan
• License: other
• Created: 2017-03-29T23:45:58.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2024-04-02T22:49:27.000Z (3 months ago)
• Last Synced: 2024-04-08T11:16:07.216Z (3 months ago)
• Topics: clickhouse, database, dialect, sqlalchemy, yandex
• Language: Python
• Homepage: https://clickhouse-sqlalchemy.readthedocs.io
• Size: 560 KB
• Stars: 387
• Watchers: 15
• Forks: 116
• Open Issues: 71
• Metadata Files:
  • Readme: README.rst
  • Changelog: CHANGELOG.md
  • Contributing: CONTRIBUTING.rst
  • Funding: .github/FUNDING.yml
  • License: LICENSE

Lists

• awesome-clickhouse - xzkostyan/clickhouse-sqlalchemy - ClickHouse dialect for SQLAlchemy to ClickHouse database (Language bindings / Python)

README

        
ClickHouse SQLAlchemy

=====================

ClickHouse dialect for SQLAlchemy to `ClickHouse database `_.

.. image:: https://img.shields.io/pypi/v/clickhouse-sqlalchemy.svg

    :target: https://pypi.org/project/clickhouse-sqlalchemy

.. image:: https://coveralls.io/repos/github/xzkostyan/clickhouse-sqlalchemy/badge.svg?branch=master

    :target: https://coveralls.io/github/xzkostyan/clickhouse-sqlalchemy?branch=master

.. image:: https://img.shields.io/pypi/l/clickhouse-sqlalchemy.svg

    :target: https://pypi.org/project/clickhouse-sqlalchemy

.. image:: https://img.shields.io/pypi/pyversions/clickhouse-sqlalchemy.svg

    :target: https://pypi.org/project/clickhouse-sqlalchemy

.. image:: https://img.shields.io/pypi/dm/clickhouse-sqlalchemy.svg

    :target: https://pypi.org/project/clickhouse-sqlalchemy

.. image:: https://github.com/xzkostyan/clickhouse-sqlalchemy/actions/workflows/actions.yml/badge.svg

   :target: https://github.com/xzkostyan/clickhouse-sqlalchemy/actions/workflows/actions.yml

Documentation

=============

Documentation is available at https://clickhouse-sqlalchemy.readthedocs.io.

Usage

=====

Supported interfaces:

- **native** [recommended] (TCP) via `clickhouse-driver `

- **async native** (TCP) via `asynch `

- **http** via requests

Define table

    .. code-block:: python

        from sqlalchemy import create_engine, Column, MetaData

        from clickhouse_sqlalchemy import (

            Table, make_session, get_declarative_base, types, engines

        )

        uri = 'clickhouse+native://localhost/default'

        engine = create_engine(uri)

        session = make_session(engine)

        metadata = MetaData(bind=engine)

        Base = get_declarative_base(metadata=metadata)

        class Rate(Base):

            day = Column(types.Date, primary_key=True)

            value = Column(types.Int32)

            __table_args__ = (

                engines.Memory(),

            )

        Rate.__table__.create()

Insert some data

    .. code-block:: python

        from datetime import date, timedelta

        from sqlalchemy import func

        today = date.today()

        rates = [

            {'day': today - timedelta(i), 'value': 200 - i}

            for i in range(100)

        ]

And query inserted data

    .. code-block:: python

        session.execute(Rate.__table__.insert(), rates)

        session.query(func.count(Rate.day)) \

            .filter(Rate.day > today - timedelta(20)) \

            .scalar()

License

=======

ClickHouse SQLAlchemy is distributed under the `MIT license

`_.