Evgen Potemkin is a developer in query optimizer team at MySQL, we’ve been working together for about 3 years now. So, it was a bit unexpected to read in the PostgreSQL news that (originally) his CONNECT BY patch has made it into PostgreSQL. No, we don’t have people coding for two DBMSes at the same time (yet?), the patch has been developed years before Evgen has joined MySQL.
One of the questions raised by the prospect of becoming a part of Sun was whether/how we will handle being a part of company that develops other DBMS as well. I suppose this patch news sets a good start.
It turns out the patch is not in the PostgreSQL tree after all. It is just people at http://www.postgresql.at (which is NOT just a different name for http://www.postgresql.org, and that was my error) merged the patch into a 8.3 version of PostgreSQL and made the result available to download).
Sorry for creating confusion, and thanks to those who pointed this out in the comments.