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Re: phrase search

From: Sushant Sinha <sushant354(at)gmail(dot)com>
To: Teodor Sigaev <teodor(at)sigaev(dot)ru>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: phrase search
Date: 2008-06-04 02:49:44
Message-ID: 1212547785.7018.5.camel@dragflick (view raw or flat)
Thread:
Lists: pgsql-hackers
On Tue, 2008-06-03 at 22:16 +0400, Teodor Sigaev wrote:
> > This is far more complicated than I thought.
> >> Of course, phrase search should be able to use indexes.
> > I can probably look into how to use index. Any pointers on this?
> 
> src/backend/utils/adt/tsginidx.c, if you invent operation #  in tsquery then you 
> will have index support with minimal effort.
> > 
> > Yes this is exactly how I am using in my application. Do you think this
> > will solve a lot of common case or we should try to get phrase search
> 
> Yeah, it solves a lot of useful case, for simple use it's needed to invent 
> function similar to existsing plaitnto_tsquery, say phraseto_tsquery. It should 
> produce correct tsquery with described above operations.
> 

I can add index support and support for arbitrary distance between
lexeme. 

It appears to me that supporting arbitrary boolean expression will be
complicated. Can we pull out something from TSQuery?

-Sushant.


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