On Tue, Mar 24, 2009 at 4:53 PM, Jasen Betts <jasen@xnet.co.nz> wrote:
> On 2009-03-18, cifroes <cifroes@netcabo.pt> wrote:
>> This is a multi-part message in MIME format.
>>
>> ------_=_NextPart_001_01C9A7E6.B32BBA87
>> Content-Type: text/plain;
>> charset="iso-8859-1"
>> Content-Transfer-Encoding: quoted-printable
>>
>> Hi,
>>
>> I have a DB in utf-8 and postgres 8.3.x.=20
>>
>> How can I do an accent insensitive search (like ...) ?
>
> use a posix regular expression that matches the string you want:
>
> select * from foo where colname ~ '^[CcĆćĈĉĊċČč][ĀāĂ㥹Aa][Pp][ŌōŎŏŐő]$';
>
> you could write a function to do the translation.
Unicode normalization is an interesting way to strip accents I've found:
>>> import unicodedata
>>>
>>> s = u'Björn'
>>> s = unicodedata.normalize("NFKD", s)
>>> s = ''.join(c for c in s if ord(c) < 127)
>>> print s
Bjorn
You can also use the character names to map many more characters to
the ascii equivalent. A large number of these can me smashed into
ASCII using regular expressions and some manual mappings to map LETTER
THORN -> th, LETTER LATERAL CLICK -> X etc. Just mapping CAPITAL
LETTER XX -> XX and SMALL LETTER XX -> xx seems to get you most of
europe if you special case SHARP S -> ss and THORN -> th.
>>> s = u'ァ'
>>> print unicodedata.name(s)
KATAKANA LETTER SMALL A
--
Stuart Bishop <stuart@stuartbishop.net>
http://www.stuartbishop.net/
