| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | Mark Cave-Ayland <mark(dot)cave-ayland(at)siriusit(dot)co(dot)uk>, Paul Ramsey <pramsey(at)cleverelephant(dot)ca>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Teodor Sigaev <teodor(at)sigaev(dot)ru>, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: knngist - 0.8 |
| Date: | 2010-10-18 19:36:51 |
| Message-ID: | AANLkTi=tTVu_XX=G1NoxZUa9icOnx5DQ6UREZ0oBoq1o@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Oct 18, 2010 at 3:33 PM, Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
> On mån, 2010-10-18 at 11:41 +0100, Mark Cave-Ayland wrote:
>> Paul Ramsey wrote:
>>
>> >> So what kind of data structure would you like for a typmod?
>> >
>> > I'm a primitive enough beast that just having 64-bits would make me
>> > happy. As a general matter though, a bytea?
>> >
>> > P
>>
>> For my vote, I'd prefer either the Oid of a custom type or an array of
>> Oid, Datum pairs - i.e. something we can extend in the future if required.
>
> I think if we really wanted to design this generally, we'd give a type
> function arguments. So, numeric would get (int default = 0, int default
> = 0). That can easily get very complicated, of course.
>
> In any case, for the shorter term, it's clear that refactoring the
> passing around of type + typmod would help this endeavor, so I'm going
> to give it a try.
By "this endeavor" do you mean KNNGIST, or per-column collation?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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