Re: [Plproxy-users] A complex plproxy query

On 1/22/09, Igor Katson <descentspb(at)gmail(dot)com> wrote:
> Hannu Krosing wrote:
> > On Thu, 2009-01-22 at 02:33 +0300, Igor Katson wrote:
> >
> >
> >> So to say, give me the list of friends (not only their ID's, but all the
> >> needed columns!) of given individual, which are in a given group. That
> >> seems ok without plproxy, but with using it, I can't imagine how can I
> >> form a nice query, or a function (or a set of plpgsql + plproxy
> >> functions) to do the job.
> >>
> >
> > You need to do it in two steps - first run a query on the partition the
> > user is in to get list of friends ids, then run a second RUN ON ALL
> > query with
> >
> > WHERE f.friend.id in (list of ids from f1) AND f.group_id = $2
> >
> > to gather all friend info in parallel
> >
> >
>
> I was thinking about that. But I don't understand, how can I pass the
> list of id's. Should I turn the output of a select into an array? How
> then? What if the array gets hundreds of items long?

Yes, array works fine. And if it's long, then let it be long...

--
marko