Re: [SQL] Regular Expression for 'and' instead of 'or'

Thank you very much Fernando.  Do you know whether this expression (regex)
use index scan ?

Regards,
Sam
----- Original Message -----
From: "Fernando Schapachnik" <fschapachnik@vianetworks.com.ar>
To: "Samuel J. Sutjiono" <ssutjiono@wc-group.com>
Cc: <pgsql-sql@postgresql.org>; <pgsql-general@postgresql.org>
Sent: Friday, February 22, 2002 1:15 PM
Subject: Re: [SQL] [GENERAL] Regular Expression for 'and' instead of 'or'


> En un mensaje anterior, Samuel J. Sutjiono escribió:
> > This expression matches the word socks or shoes or nike in product
category
> > where productdescr ~* '(socks|shoes|nike)'
> >
> > Does anybody know what the expression should be  if I want to do 'and'
of those key words instead of 'or' ?
>
> You have to use something like:
>
> '(socks.*shoes.*nike)|(socks.*nike.*shoes)|...'
>
> where ... is every other possible combination. Not pretty, but that's
> a limitation of finite automata (or regular expressions, which are
> the same).
>
> Regards.
>
>
>
> Fernando P. Schapachnik
> Gerente de tecnología de red
> y sistemas de información
> VIA NET.WORKS ARGENTINA S.A.
> fschapachnik@vianetworks.com.ar
> Tel.: (54-11) 4323-3381
>
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