Contributing Code to MySQL -- Some Simple Guidelines
By MortazaviBlog on Feb 13, 2009
If you would like to contribute to MySQL development, you can read the relevant top-level page on the MySQL Forge.
This page has some useful links to various forms of contributing to MySQL, including contribution of code to MySQL. (The MySQL|Sun team have recently simplified some of these pages in order to make them more useful to community members and potential contributors.)
It is a common parctice to require initial paperwork to clarify rights to the contributed work. This practice is also used by other open-source communities such as the Apache Software Foundation.
It is worth quoting, from the the master document, that
As we gain more experience, absorb more contributions and receive feedback from the contributors, please expect some modifications to the contribution system described here.