You may find MIT's Database Systems course helpful, the labs consist of building several db components in Java (and the prof is Stonebraker, of Postgres fame):

You may find MIT's Database Systems course helpful, the labs consist of building several db components in Java (and the prof is Stonebraker, of Postgres fame): https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-830-database-systems-fall-2010/ https://ocw.mit.edu/courses/electrical-engineering-and-compu... https://youtu.be/F3XGUPll6Qs https://youtu.be/F3XGUPll6Qs http://blog.marcua.net/post/117671929 http://blog.marcua.net/post/117671929