From: Rajesh Kumar Mallah <mallah@trade-india.com>
To: Achilleus Mantzios <achill@matrix.gatewaynet.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Comparing tsearch2 vectors.
Date: Mon, 12 Jul 2004 18:04:25 +0530
Message-ID: <40F28551.3030605@trade-india.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0407121357050.3554-100000@matrix.gatewaynet.com>
References: <Pine.LNX.4.44.0407121357050.3554-100000@matrix.gatewaynet.com>
Dear Mantzios,
I have to get set of banners from database in
response to a search term. I want that the search term
be compared to the keyword corresponding to the
banners stored in database. current i am doing an
equality match but i woild like to do it after stemming
both the sides (serch term and keywords).
So that the banners for the adword say 'incense exporter' is
shown even if 'incenses exporter' or 'incense exporters' is
searched.
I hope i am able to clarify.
Regds
Mallah.
Achilleus Mantzios wrote:
>O kyrios Rajesh Kumar Mallah egrapse stis Jul 12, 2004 :
>
>
>
>>Hi,
>>
>>We want to compare strings after stemming. Can anyone
>>tell me what is the best method. I was thinking to compare
>>the tsvector ,but there is no operator for that.
>>
>>
>
>I'd tokenize each string and then apply lexize() to get the
>equivalent stemified
>word, but what exactly are you trying to accomplish?
>
>
>
>>Regds
>>Mallah.
>>
>>
>>
>>tradein_clients=# SELECT to_tsvector('handicraft exporters');
>>+---------------------------+
>>| to_tsvector |
>>+---------------------------+
>>| 'export':2 'handicraft':1 |
>>+---------------------------+
>>(1 row)
>>
>>Time: 710.315 ms
>>tradein_clients=#
>>tradein_clients=# SELECT to_tsvector('handicrafts exporter');
>>+---------------------------+
>>| to_tsvector |
>>+---------------------------+
>>| 'export':2 'handicraft':1 |
>>+---------------------------+
>>(1 row)
>>
>>Time: 400.679 ms
>>tradein_clients=# SELECT to_tsvector('Hi there') = to_tsvector('Hi there');
>>ERROR: operator does not exist: tsvector = tsvector
>>HINT: No operator matches the given name and argument type(s). You may
>>need to add explicit type casts.
>>tradein_clients=#
>>
>>
>>
>>
>
>
>
--
regds
Mallah.
Rajesh Kumar Mallah
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To: pgsql-sql@postgresql.org
Cc: mallah@trade-india.com, achill@matrix.gatewaynet.com
Subject: Re: Comparing tsearch2 vectors.
In-Reply-To: <40F28551.3030605@trade-india.com>
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