Re: Question with tsearch2 (or it might be a general one too)

Ritesh --

You are correct in thinking that "@@" is a special operator defined for tesearch2; it uses the GIST indexes to do a
search,but more than that I can't say, since I am not really familiar with tsearch2. (In the postGIS world there is a
vaguelyequivalent operator, "&&", again using postgres' ability to define ones own data types and functions. 

HTH,

Greg Williamson
DBA
GlobeXplorer LLC


-----Original Message-----
From:    pgsql-general-owner@postgresql.org on behalf of Ritesh Nadhani
Sent:    Thu 10/19/2006 11:38 AM
To:    pgsql-general@postgresql.org
Cc:
Subject:    [GENERAL] Question with tsearch2 (or it might be a general one too)

Hello

A newbie to PostgreSQL from MySQL and just trying to learn tsearch2. In
one of the examples at:

http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch-V2-intro.html

the query given is:

SELECT intindex, strTopic FROM tblmessages
                 WHERE idxfti @@ to_tsquery('default', 'gettysburg &
address')
                 AND strMessage ~* '.*men are created equal.*';

What does the '@@' in the query means?

I did a search at:


http://search.postgresql.org/www.search?ul=http%3A%2F%2Fwww.postgresql.org%2Fdocs%2F8.1%2Finteractive%2F%25&fm=on&cs=utf-8&q=%40%40

an it dosnt return any result.

Is this specific to tsearch2? What does that mean?

Ritesh

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