From: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
---|---|
To: | sushant354(at)gmail(dot)com |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: possible bug in cover density ranking? |
Date: | 2009-01-29 17:38:25 |
Message-ID: | 4981E991.3030002@sigaev.ru |
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Thread: | |
Lists: | pgsql-hackers |
> Is this what is desired? It seems to me that Wdoc is getting a high
> ranking even when we are not sure of the position information.
0.1 is not very high rank, and we could not suggest any reasonable rank in this
case. This document may be good, may be bad. rank_cd is not limited by 1.
>
> The comment above says that "In this case we approximate number of
> noise word as half cover's length". But we do not know the cover's
> length in this case as ext.p and ext.q are both unreliable. And ext.end
> -ext.begin is not the "cover's length". It is the number of query items
> found in the cover.
Yeah, but if there is no information then information is absent :), but I agree
with you to change comment
--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/
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