Re: default_text_search_config and expression indexes

From: Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>
To: tomas(at)tuxteam(dot)de
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Ron Mayer <rm_pg(at)cheapcomplexdevices(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: default_text_search_config and expression indexes
Date: 2007-08-09 10:03:13
Message-ID: Pine.LNX.4.64.0708091358260.18739@sn.sai.msu.ru
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On Thu, 9 Aug 2007, tomas(at)tuxteam(dot)de wrote:

> Maybe I'm missing something, but it seems to me that the configuration
> is more attached to a column/index thatn to the whole database. If
> there's a default in an expression, I'd rather expect this default to be
> drawn from the index involved than from a global value (like a functional
> index does now).

I'm tired to repeat - index itself doesn't know about configuration !
It just index tsvector data type. tsvector in turn can be obtained
using various ways:
1. manually
2. to_tsvector

tsvector can be stored in a separate attribute or be fully virtual
like in expressional index.

Moreover, tsvector can be obtained using various configurations depending
on your application.

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83

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