| From: | "Mike Rylander" <mrylander(at)gmail(dot)com> |
|---|---|
| To: | "Markus Schiltknecht" <markus(at)bluegap(dot)ch> |
| Cc: | "Teodor Sigaev" <teodor(at)sigaev(dot)ru>, "PostgreSQL General" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: tsearch2: word position |
| Date: | 2007-02-22 17:08:24 |
| Message-ID: | b918cf3d0702220908k7e1bb8dcr1de8a7794b71a135@mail.gmail.com |
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| Lists: | pgsql-general |
On 2/22/07, Markus Schiltknecht <markus(at)bluegap(dot)ch> wrote:
> Hello Teodor,
>
> Teodor Sigaev wrote:
> > byte offset of word is useless for ranking purpose
>
> Why is a word number more meaningful for ranking? Are the first 100
> words more important than the rest? That seems as ambiguous as saying
> the first 1000 bytes are more important, no?
No, the first X aren't more important, but being able to determine
word proximity is very important for partial phrase matching and
ranking. The closer the words, the "better" the match, all else being
equal.
--
Mike Rylander
mrylander(at)gmail(dot)com
GPLS -- PINES Development
Database Developer
http://open-ils.org
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