Re: Creating an index-type for LIKE '%value%'

On Tue, 8 Feb 2005, Larry Rosenman wrote:

> Oleg Bartunov wrote:
>> On Tue, 8 Feb 2005, Larry Rosenman wrote:
>>
>>>
>>> It doesn't seem to like pieces with hyphens ('-') in the name, when I
>>> try To update blacklist set new_domain_lt=text2ltree(domain) I get a
>>> Syntax error (apparently for the hyphens).
>>>
>>
>> Try change definition of ISALNUM on ltree.h
>>
>> #define ISALNUM(x) ( isalnum((unsigned char)(x)) || (x) == '_' )
>>
>> this was already discussed
>> http://www.pgsql.ru/db/mw/msg.html?mid=2034299
>>
> Thanks!
>
> Now, how can I make it always case-insensitive?
>

from http://www.sai.msu.su/~megera/postgres/gist/ltree/

It is possible to use several modifiers at the end of a label:

@ Do case-insensitive label matching
* Do prefix matching for a label
% Don't account word separator '_' in label matching, that is
'Russian%' would match 'Russian_nations', but not 'Russian'

>
>
>

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83