This chapter describes a lot of things that you need to know when working on the MySQL code. If you plan to contribute to MySQL development, want to have access to the bleeding-edge versions of the code, or just want to keep track of development, follow the instructions in 項2.9.3. 「開発ソース ツリーからのインストール」. If you are interested in MySQL internals, you should also subscribe to our internals mailing list. This list has relatively low traffic. For details on how to subscribe, please see 項1.6.1. 「MySQL メーリング リスト」. All developers at MySQL AB are on the internals list and we help other people who are working on the MySQL code. Feel free to use this list both to ask questions about the code and to send patches that you would like to contribute to the MySQL project!