| From: | Sergey Konoplev <gray(dot)ru(at)gmail(dot)com> |
|---|---|
| To: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
| Cc: | Stas Kelvich <stas(dot)kelvich(at)gmail(dot)com>, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Cube extension kNN support |
| Date: | 2014-03-31 19:45:37 |
| Message-ID: | CAL_0b1uJ=v-eeq+zzJg0XgKvG-zNw+7--rvWMqjSSDomd=N6Uw@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Mon, Mar 31, 2014 at 12:09 PM, Alexander Korotkov
<aekorotkov(at)gmail(dot)com> wrote:
>> I'm not sure if it is doable at all, but are there any possibility to
>> implement here, or, what would be just great, any ready/half ready
>> solutions of a Hamming distance based kNN search?
>
> Cube dealing with float8 numbers. There is another patch making it work with
> other number types. But Hamming distance is for bit vectors, isn't it?
It can be generalized as for character vectors. Though, I agree, that
was an off topic question in some extent. I was wondering if there
were any postgres related indexable Hamming/Manhattan distance
experiments/thoughts/discussions, if kNN can be used here or not,
because from my understanding it can be represented as spatial (I
might be very wrong here).
--
Kind regards,
Sergey Konoplev
PostgreSQL Consultant and DBA
http://www.linkedin.com/in/grayhemp
+1 (415) 867-9984, +7 (901) 903-0499, +7 (988) 888-1979
gray(dot)ru(at)gmail(dot)com
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Stephen Frost | 2014-03-31 19:52:15 | Re: Patch to add support of "IF NOT EXISTS" to others "CREATE" statements |
| Previous Message | Tom Lane | 2014-03-31 19:19:13 | Re: Securing "make check" (CVE-2014-0067) |