On 12 November 2014 00:54, Robert Haas <robertmh...@gmail.com> wrote: > On Tue, Nov 11, 2014 at 3:29 AM, Simon Riggs <si...@2ndquadrant.com> wrote: >> * only functions marked as "CONTAINS NO SQL" >> We don't really know what proisparallel is, but we do know what >> CONTAINS NO SQL means and can easily check for it. >> Plus I already have a patch for this, slightly bitrotted. > > Interestingly, I have a fairly solid idea of what proisparallel is, > but I have no clear idea what CONTAINS NO SQL is or why it's relevant. > I would imagine that srandom() contains no SQL under any reasonable > definition of what that means, but it ain't parallel-safe.
What is wrong in generating random numbers in parallel? But I'm sure many volatile functions would be annoying to support, so CONTAINS NO SQL and STABLE/IMMUTABLE seems OK for the first thing. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
