MySQL has deep roots in open-source software development communities
and code contributions to MySQL keep flowing in, being reviewed and
integrated into the MySQL.
During our BoF at the MySQL Conference and Expo, Lenz Grimmer talked about our work to make MySQL (even more) contributor
friendly, with some more focused effort starting on February 1, 20091.
The desire to contribute code to MySQL remains as strong as ever as evidenced by
this year's MySQL Conference and Expo, where I had an opportunity to speak with some
contributors and partners who wish to contribute to MySQL. Of course, there are a lot of strong and varying opinions in this area.
As I said above, code has been contributed and absorbed in MySQL (according to either the MySQL CLA or SCA contributor agreements) for years now.
Examining just the patches and contributions submitted through the MySQL Bugs database, some 16 pieces of code contributions to MySQL have been absorbed into some version of the MySQL server in the first 4 months of this calendar year, and there are some 17 SCA signatories who are intent on contributing to MySQL.
As examples of code contributions being currently reviewed, one may point to two thread on "internals," one involving a review by Konstantin Osipov (contributor: Antony Curtis, WL#820) and another a review by Guilhem Bichot (contributor: Erik Ljungstrom).
 February 1, 2009 was exactly 10
years from the day I started working for Sun Microsystems Inc., February 1, 1999, when I started in the J2EE RI development team.