We use `SELECT INTO` to do feature extraction. We select `offline` here, so it will run sql on offline engine.
## Environment to prepare
### Start the OpenMLDB cluster
You should create an OpenMLDB cluster first. If in production env, please check [deploy OpenMLDB](https://openmldb.ai/docs/en/v0.5/deploy/install_deploy.html).
You can follow [run OpenMLDB in docker](https://openmldb.ai/docs/zh/v0.5/quickstart/openmldb_quickstart.html#id11)
to a quick start.
### Python env
The OpenMLDB task will use OpenMLDB Python SDK to connect OpenMLDB cluster. So you should have the Python env.
We will use `python3` by default. You can set `PYTHON_HOME` to use your custom python env.
Make sure you have installed OpenMLDB Python SDK in the host where the worker server running, using `pip install openmldb`.