2009/6/14 hubert depesz lubaczewski <depesz@depesz.com>:
> On Sun, Jun 14, 2009 at 08:15:55AM +0200, Pavel Stehule wrote:
>> postgres=# select '10' ~ '[0..9]+$';
>> ?column?
>> ----------
>> t
>> (1 row)
>
> regexp '[0..9]+$' tests is given strings containst at the end substring
> containing only characters "0", "9" and ".".
> and yes, it does - the last character is 0, so it matches.
>
>> postgres=# select '10' ~ '^[0..9]+$';
>> ?column?
>> ----------
>> f
>> (1 row)
>
> this regexp checks if whole string is built only with characters "0",
> "9", and ".". and it is not - the first character is "1" which is not
> the character list you provided.
>
> basically ".." has no special meaning in regexps, especially within [] -
> i.e. it is just a dot.
>
my mistake
thank you
Pavel
> Best regards,
>
> depesz
>
> --
> Linkedin: http://www.linkedin.com/in/depesz / blog: http://www.depesz.com/
> jid/gtalk: depesz@depesz.com / aim:depeszhdl / skype:depesz_hdl / gg:6749007
>