Ask HN: JDBC passthru or MariaDB / PostgreSQL mock server?

I'm working with an application which only logs to a SQL db; it uses JDBC. It comes with JDBC drivers for MariaDB and PostgreSQL. It is possible to install additional JDBC drivers.

I want to do some other logly things with the logs. I think what I need is either a mock server which will output the INSERTs received, or a JDBC driver which outputs the same thing (preferably to a network connection). Being able to respond to other things sent by the application with canned responses would be a bonus.

Any suggestions would be greatly appreciated, thanks in advance.