On Mon, 10 Sep 2007, Simon Riggs wrote:
On Mon, 2007-09-10 at 12:58 +0100, Heikki Linnakangas wrote:
Simon Riggs wrote:
It seems possible to write your own functions to support various
possibilities with text search.
One of the more common thoughts is to have a list of words that you
would like to include, i.e. the opposite of a stop word list.
There are clear indications that indexing too many words is a problem
for both GIN and GIST. If people already know what they'll be looking
for and what they will never be looking for, it seems easier to supply
that list up front, rather than hide it behind lots of hand-crafted
code.
I don't understand what you're proposing. We already have dict_synonym
that you can use to accept a simple list of words.
How does that allow me to limit the number of words to a known list?
text search doesn't index unknown words, so if your mapping contains
only one dictionary, this dictionary will control what words to index.
While dict_synonym is good for not big list I'd write separate dictionary
with fast lookup.
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: [EMAIL PROTECTED], http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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