Re: Patent warning about the Greenplum source code

From: Andres Freund <andres(at)anarazel(dot)de>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: Patent warning about the Greenplum source code
Date: 2015-10-30 08:56:48
Views: Raw Message | Whole Thread | Download mbox | Resend email
Lists: pgsql-hackers


I don't really want to discuss patent issues publically.

On 2015-10-30 04:47:35 -0400, Bruce Momjian wrote:
> However, while the license defines and uses "Derivative Works", it does
> not mention that in the patent grant clause. I assume this means that
> patent grants do not apply to derived works, meaning if code or ideas
> were moved from Greenplum to Postgres (which is not Apache 2.0
> licensed), it would not have a patent grant. I talked to Greenplum staff
> about this a few months ago and they did not dispute my analysis.

The easiest thing would be to dual-licensce the code such contributions
to postgres. That sounds quite possible to me.

> Therefore, I caution people from viewing the Greenplum source code as
> you might see patented ideas that could be later implemented in
> Postgres, opening Postgres up to increased patent violation problems. I
> am also concerned about existing community members who work for
> Pivotal/Greenplum and therefore are required to view the patented source
> code.

Issues around this are much larger than patents. Any contribution done
under employment has such risks. That's why the kernel has the

Check the section about signed-off-by in
and simpler


Andres Freund

In response to


Browse pgsql-hackers by date

  From Date Subject
Next Message Bruce Momjian 2015-10-30 09:03:13 Re: Patent warning about the Greenplum source code
Previous Message Bruce Momjian 2015-10-30 08:47:35 Patent warning about the Greenplum source code