Re: Designing an extension for feature-space similarity search

From: Alexander Korotkov <aekorotkov(at)gmail(dot)com>
To: Jay Levitt <jay(dot)levitt(at)gmail(dot)com>
Cc: PG Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Designing an extension for feature-space similarity search
Date: 2012-02-16 11:36:46
Message-ID: CAPpHfdu=iuvUjf9Fnhp7ufXb2yJ+QhxgNNqrWb5FigkMvs=x7g@mail.gmail.com
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On Thu, Feb 16, 2012 at 12:34 AM, Jay Levitt <jay(dot)levitt(at)gmail(dot)com> wrote:

> - But a dimension might be in any domain, not just floats
> - The distance along each dimension is a domain-specific function
>

What exact domains do you expect? Some domains could appear to be quite
hard for index-based similarity search using GiST (for example, sets,
strings etc.).

------
With best regards,
Alexander Korotkov.

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