Re: LC_CTYPE and matching accented chars

Alvaro Herrera wrote:
> Martin Langhoff wrote:
>> # this is apparently the right way to
>> # select base character based on the "equivalence class"
>> # as defined in the LC_CTYPE
>> =# select * from test where value ~ 'mart[=i=]n';
>
> I think it would be much easier if you did something like
>
> select * from test where lower(to_ascii(value)) = lower(to_ascii('martín'));
>
> When to_ascii doesn't work (for example because it doesn't work in UTF8)
> you may want to use convert() to recode the text to latin1 or latin9.

Well, with the example above to_ascii doesn't work.

select to_ascii(value) from test ;
ERROR: encoding conversion from UTF8 to ASCII not supported

And neither does convert

select convert(value using utf8_to_ascii) from test ;
ERROR: character 0xc3 of encoding "MULE_INTERNAL" has no equivalent
in "SQL_ASCII"

select convert('martín' using utf8_to_ascii) from test ;
ERROR: character 0xc3 of encoding "MULE_INTERNAL" has no equivalent
in "SQL_ASCII"

Any other alternatives?

BTW, this is on Pg8.2 as seen on Ubuntu Feisty PPC.

$ dpkg -l postgresql-8.2
ii postgresql-8.2 8.2.4-0ubuntu0.7.04

cheers,

martín
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