Excerpts from Scott Marlowe's message of lun jul 26 23:12:08 -0400 2010:
> On Mon, Jul 26, 2010 at 8:09 PM, Alvaro Herrera
> <alvherre@commandprompt.com> wrote:
> > I suspect that the problem is an incorrect client_encoding setting.
>
> Yeah, OP had set lc_collate to C under the mistaken impression that
> collation controlled the character sets you could insert into the
> database. If you create a db with lc_collate='C' then the upper only
> works on basic ascii characters near as I can tell.
Makes sense. The code seems to say that it's lc_ctype that's important
though, see str_toupper in formatting.c. So I think you could still set
collation to C and use a language-specific lc_ctype.