From: Jasen Betts <jasen@xnet.co.nz>
To: pgsql-sql@postgresql.org
Subject: Re: question about reg. expression
Date: 22 Jan 2011 08:59:27 GMT
Message-ID: <ihe69f$hl3$2@reversiblemaps.ath.cx> (raw)
References: <ih58f7$63u$1@speranza.aioe.org>
On 2011-01-18, andrew1 <andrew1@mytrashmail.com> wrote:
> hi all,
>
> these return t:
> select 'ab' ~ '[a-z]$'
this matches the b and the end of the string
> select 'ab' ~ '^[a-z]'
this matches the start of the string and the a
> select 'ab' ~ '^[a-z]$' returns f
> Can't I use ^ and $ at the same time to match, in this case?
> thanks.
the above expression only succeeds if the string is one character long
use '+' '*' or '{2}' etc after the '[a-z]' to allow it to match several letters
or use '^[a-z]|[a-z]$' to match any sting that starts or ends with a
letter.
what are you trying to find?
--
⚂⚃ 100% natural
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To: pgsql-sql@postgresql.org
Cc: jasen@xnet.co.nz
Subject: Re: question about reg. expression
In-Reply-To: <ihe69f$hl3$2@reversiblemaps.ath.cx>
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