Re: Fastest Index/Algorithm to find similar sentences

On Sat, Jul 27, 2013 at 10:04 AM, Janek Sendrowski <janek12@web.de> wrote:
> If I'm searching for a sentence like "The tiger is the largest cat species" for example.
> I can only find the sentences, which include the words "tiger, largest, cat, species", but I also like to have the
sentenceswith only three or even two of these words. 

You can use & (AND), | (OR), and ! (NOT) operators in tsquery, so you
can achieve what you want just like this:

[local]:5432 grayhemp@grayhemp=# select to_tsquery('tiger | largest |
cat | species') @@ to_tsvector('The tiger is the largest cat');
 ?column?
----------
 t

Or may be I understand something wrong again?

>
> Janek
>
>
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--
Kind regards,
Sergey Konoplev
PostgreSQL Consultant and DBA

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