Re: Cube extension kNN support

On Mon, Mar 31, 2014 at 12:09 PM, Alexander Korotkov
<aekorotkov@gmail.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

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