https://github.com/mymarilyn/aioch

aioch - is a library for accessing a ClickHouse database over native interface from the asyncio
https://github.com/mymarilyn/aioch

asyncio clickhouse database driver native yandex

Last synced: about 1 month ago
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aioch - is a library for accessing a ClickHouse database over native interface from the asyncio

• Host: GitHub
• URL: https://github.com/mymarilyn/aioch
• Owner: mymarilyn
• License: other
• Created: 2017-09-18T19:56:45.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2022-03-23T15:30:31.000Z (over 2 years ago)
• Last Synced: 2024-11-07T19:20:21.207Z (about 1 month ago)
• Topics: asyncio, clickhouse, database, driver, native, yandex
• Language: Python
• Size: 14.6 KB
• Stars: 161
• Watchers: 4
• Forks: 19
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-clickhouse - mymarilyn/aioch - aioch is a library for accessing a ClickHouse database over native interface from the asyncio. (Language bindings / Python)

README

        
# aioch

**aioch** is a library for accessing a ClickHouse database over native interface from the asyncio.

It wraps features of [clickhouse-driver](https://github.com/mymarilyn/clickhouse-driver) for asynchronous usage.

[![Coverage Status](https://coveralls.io/repos/github/mymarilyn/aioch/badge.svg?branch=master)](https://coveralls.io/github/mymarilyn/aioch?branch=master)

[![Build Status](https://travis-ci.org/mymarilyn/aioch.svg?branch=master)](https://travis-ci.org/mymarilyn/aioch)

## Installation

The package can be installed using `pip`:

```bash

pip install aioch

```

To install from source:

```bash

git clone https://github.com/mymarilyn/aioch

cd aioch

python setup.py install

```

## Usage

```python

from datetime import datetime

import asyncio

from aioch import Client

async def exec_progress():

    client = Client('localhost')

    progress = await client.execute_with_progress('LONG AND COMPLICATED QUERY')

    timeout = 20

    started_at = datetime.now()

    async for num_rows, total_rows in progress:

        done = num_rows / total_rows if total_rows else total_rows

        now = datetime.now()

        # Cancel query if it takes more than 20 seconds to process 50% of rows.

        if (now - started_at).total_seconds() > timeout and done < 0.5:

            await client.cancel()

            break

    else:

        rv = await progress.get_result()

        print(rv)

async def exec_no_progress():

    client = Client('localhost')

    rv = await client.execute('LONG AND COMPLICATED QUERY')

    print(rv)

loop = asyncio.get_event_loop()

loop.run_until_complete(asyncio.wait([exec_progress(), exec_no_progress()]))

```

For more information see **clickhouse-driver** usage examples.

## Parameters

* `executor` - instance of custom Executor, if not supplied default executor will be used

* `loop` - asyncio compatible event loop

Other parameters are passing to wrapped clickhouse-driver's Client.

## License

aioch is distributed under the [MIT license](http://www.opensource.org/licenses/mit-license.php).