This repository contains all the code examples from my JPA Optimizations - SQL Police talk. The already optimized versions can be found on master while the yet-to-be-optimized one is on se-bad-version. You can find a summary of my talk in my crib
You can run the code to see log output either via the unit test or by starting the application and use REST endpoints to trigger the respective queries.
In any case, you need to start the Docker container with the database via docker-compose up first.