[postgis-devel] New node splitting algorithm for GiST

[Paul Ramsey]

It's on my list, but so are a lot of other things...!
P.

On Sun, Jan 8, 2012 at 7:50 AM, Alexander Korotkov <aekorotkov at gmail.com> wrote:
> Hi!
>
> Any news about this topic so soon?
> This split method is part of my Ph. D. thesis. And it would be nice for me
> to have included into PostGIS too.
>
> ------
> With best regards,
> Alexander Korotkov.
>
> On Wed, Oct 12, 2011 at 11:07 PM, Paul Ramsey <pramsey at opengeo.org> wrote:
>>
>> NM, I actually read the paper :)
>> P.
>>
>> On Wed, Oct 12, 2011 at 11:59 AM, Paul Ramsey <pramsey at opengeo.org> wrote:
>> > Is the algorithm still O(N) or is it O(N^2) ala Guttman?
>> > P.
>> >
>> > On Wed, Oct 12, 2011 at 11:58 AM, Alexander Korotkov
>> > <aekorotkov at gmail.com> wrote:
>> >>
>> >> "A new double sorting-based node splitting algorithm for R-tree", A. Korotkov
>> >> http://syrcose.ispras.ru/2011/files/SYRCoSE2011_Proceedings.pdf#page=36
>> >> I believe it's applicable to not very high dimensions (3 or 4). On 5
>> >> and
>> >> more dimensions guttmann quadratic algorithm could become more
>> >> effective
>> >> than my.
>> >> ------
>> >> With best regards,
>> >> Alexander Korotkov.
>> >> On Wed, Oct 12, 2011 at 10:49 PM, Paul Ramsey <pramsey at opengeo.org>
>> >> wrote:
>> >>>
>> >>> And, in general terms, do you think this approach would be applicable
>> >>> in higher dimensions?
>> >>> P
>> >>>
>> >>> On Wed, Oct 12, 2011 at 11:49 AM, Paul Ramsey <pramsey at opengeo.org>
>> >>> wrote:
>> >>> > Thanks for this, could you give me a reference to your paper too?
>> >>> > P.
>> >>> >
>> >>> > On Wed, Oct 12, 2011 at 10:52 AM, Alexander Korotkov
>> >>> > <aekorotkov at gmail.com> wrote:
>> >>> >> Hi!
>> >>> >> Heikki Linnakangas recently commit my patch with new node splitting
>> >>> >> algorithm for GiST to PostgreSQL master branch:
>> >>> >>
>> >>> >>
>> >>> >> http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=7f3bd86843e5aad84585a57d3f6b80db3c609916
>> >>> >> Since it can significantly accelerate index search, you might be
>> >>> >> interested
>> >>> >> to apply same changes to PostGIS.
>> >>> >> Discussion threads are here:
>> >>> >> http://archives.postgresql.org/pgsql-hackers/2011-10/msg00158.php
>> >>> >> http://archives.postgresql.org/pgsql-hackers/2011-09/msg00576.php
>> >>> >> ------
>> >>> >> With best regards,
>> >>> >> Alexander Korotkov.
>> >>> >> _______________________________________________
>> >>> >> postgis-devel mailing list
>> >>> >> postgis-devel at postgis.refractions.net
>> >>> >> http://postgis.refractions.net/mailman/listinfo/postgis-devel
>> >>> >>
>> >>> >>
>> >>> >
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>> >>
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>> >
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