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How to Connect MySQL with SQLFlow

This tutorial explains how to connect SQLFlow with MySQL.

Connect Existing MySQL Server

To connect an existed MySQL server instance, we need to configure a datasource string in the format of

mysql://{username}:{password}@tcp({address})/{dbname}[?param1=value1&...&paramN=valueN]

In the above format,

  • username indicates the user name, e.g root.
  • password indicates the password, e.g. root.
  • address indicates the ip address and the port number, e.g. 127.0.0.1:3306.
  • dbname indicates the database name, e.g. iris.
  • param1=value1 indicates additional configurations, e.g. maxAllowedPacket=0.

Putting these all together, we can construct a data source string like

mysql://root:root@tcp(127.0.0.1:3306)/iris?maxAllowedPacket=0

Using the datasource, you may launch an all-in-one Docker container by running:

> docker run --rm -p 8888:8888 sqlflow/sqlflow bash -c \
"sqlflowserver --datasource='mysql://root:root@tcp(127.0.0.1:3306)/iris?maxAllowedPacket=0' &
SQLFLOW_SERVER=localhost:50051 jupyter notebook --ip=0.0.0.0 --port=8888 --allow-root --NotebookApp.token=''"

Open localhost:8888 through a web browser, and you will find there are many SQLFlow tutorials, e.g. iris-dnn.ipynb. Please follow the tutorials and substitute the data for your use.

If you are running MySQL on remote, please be aware that MySQL only allows connections from localhost by default. The fix can be found here.

Create a MySQL Server Locally for Testing

Our official Docker image has installed a mysql server. We can start it by docker run --rm -it sqlflow/sqlflow bash, then type service mysql start in the console. We should be able to see

$ service mysql start
 * Starting MySQL database server mysqld
No directory, logging in with HOME=/
                                                       [OK]

Then we can access the server by typing mysql -uroot -proot.