1. Chapter 31: PostgreSQL by Ioannis Alagiannis and Renata Borovica-Gajic from Database System Concepts, 7th ed
2. Setting up PostgreSQL in VSCode or Eclipse
3. Steps in building and running PostgreSQL
4. A tour of PostgreSQL by Tom Lane
5. Internals of PostgreSQL for database administrators and System Developers by Hironobu Suzuki
6. How to use the debugger to explore PostgreSQL
7. Intro to Hacking PostgreSQL by Gavin Sherry (Read sections upto and including Conventions; you can skip sections on submitting a patch and real code for now.)
8. Hacking PostgreSQL by Neil Conway (Read sections upto and including Architecture, skip sections from common code conventions onwards for now).
9. PostgreSQL internals through pictures by Bruce Momjian
10. An Introduction to Hacking PostgreSQL by Neil Conway and Gavin Sherry
    • Handout to accompany above slides, showing end-to-end steps to introduce a new feature in PostgreSQL
11. PostgreSQL (current version) internals documentation at postgresql.org (gives quite a bit of information)
12. Bruce Momjian's presentations on PostgreSQL internals
13. Other Useful PostgreSQL links
    • PostgreSQL web-site
    • PostgreSQL (current version) user documentation
    • PostgreSQL coding conventions
    • Todo list for PostgreSQL features, good place to hunt for project ideas
    • PostgreSQL wiki page giving documentation, howto's tips, etc.
    • Wikipedia page for PostgreSQL