Skip to main content

A asyncio driver for ClickHouse with native tcp protocol

Project description

asynch

pypi license workflows workflows

Introduction

asynch is an asyncio ClickHouse Python Driver with native (TCP) interface support, which reuse most of clickhouse-driver and comply with PEP249.

Install

> pip install asynch

Usage

connect

from asynch import connect

async def connect_database():
    conn = await connect(
        host: str = "127.0.0.1",
        port: int = 9000,
        database: str = "default",
        user: str = "default",
        password: str = "",
    )

create table

async def create_table():
    async with conn.cursor(cursor=DictCursor) as cursor:
        await cursor.execute('create database if not exists test')
        await cursor.execute("""
        CREATE TABLE if not exists test.asynch
            (
                `id`       Int32,
                `decimal`  Decimal(10, 2),
                `date`     Date,
                `datetime` DateTime,
                `float`    Float32,
                `uuid`     UUID,
                `string`   String,
                `ipv4`     IPv4,
                `ipv6`     IPv6

            )
            ENGINE = MergeTree
                ORDER BY id"""
        )

fetchone

async def fetchone():
    async with conn.cursor() as cursor:
        await cursor.execute("SELECT 1")
        ret = cursor.fetchone()
        assert ret == (1,)

fetchmany

async def fetchall():
    async with conn.cursor() as cursor:
        await cursor.execute("SELECT 1")
        ret = cursor.fetchall()
        assert ret == [(1,)]

Use DictCursor

async def dict_cursor():
    async with conn.cursor(cursor=DictCursor) as cursor:
        await cursor.execute("SELECT 1")
        ret = cursor.fetchall()
        assert ret == [{"1": 1}]

insert

from asynch.cursors import DictCursor

async def insert_dict():
    async with conn.cursor(cursor=DictCursor) as cursor:
        ret = await cursor.execute(
            """INSERT INTO test.asynch(id,decimal,date,datetime,float,uuid,string,ipv4,ipv6) VALUES""",
            [
                {
                    "id": 1,
                    "decimal": 1,
                    "date": "2020-08-08",
                    "datetime": "2020-08-08 00:00:00",
                    "float": 1,
                    "uuid": "59e182c4-545d-4f30-8b32-cefea2d0d5ba",
                    "string": "1",
                    "ipv4": "0.0.0.0",
                    "ipv6": "::",
                }
            ],
        )
        assert ret == 1

insert with dict

async def insert_tuple():
    async with conn.cursor(cursor=DictCursor) as cursor:
        ret = await cursor.execute(
            """INSERT INTO test.asynch(id,decimal,date,datetime,float,uuid,string,ipv4,ipv6) VALUES""",
            [
                (
                    1,
                    1,
                    "2020-08-08",
                    "2020-08-08 00:00:00",
                    1,
                    "59e182c4-545d-4f30-8b32-cefea2d0d5ba",
                    "1",
                    "0.0.0.0",
                    "::",
                )
            ],
        )
        assert ret == 1

Connection Pool

async def use_pool():
    pool = await asynch.create_pool()
    async with pool.acquire() as conn:
        async with conn.cursor() as cursor:
            await cursor.execute("SELECT 1")
            ret = cursor.fetchone()
            assert ret == (1,)
    pool.close()
    await pool.wait_closed()

Notice

This project is under development and mostly forked from clickhouse-driver. And this project not use in production, so PR and issue is great welcome.

ThanksTo

License

This project is licensed under the Apache-2.0 License.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

asynch-0.1.1.tar.gz (47.2 kB view hashes)

Uploaded source

Built Distribution

asynch-0.1.1-py3-none-any.whl (65.1 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page