Summary

MySQL 5.1 has been released and new features are being added to MySQL 5.5 and later versions, and to independently developed MariaDB—a backward compatible fork of MySQL with additional features. Plugin API is being changed and extended too. In the Appendix, we have seen a few large features that are already implemented and available, but which did not make it to MySQL 5.1. Of course, there are numerous smaller changes of differing importance both in MySQL and MariaDB—this Appendix simply cannot cover them all. And surely even more features are planned or being developed as you read these lines.

Good luck in your plugin development adventure, and have fun!