Re: tolower() identifier downcasing versus multibyte encodings

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От Marko Kreen
Тема Re: tolower() identifier downcasing versus multibyte encodings
Дата
Msg-id AANLkTikx_czBkDDeseGHViirPz8K0WmHAPyijkMD12no@mail.gmail.com
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Ответ на Re: tolower() identifier downcasing versus multibyte encodings  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: tolower() identifier downcasing versus multibyte encodings  ("Francisco Figueiredo Jr." <francisco@npgsql.org>)
Список pgsql-hackers
On Sat, Mar 19, 2011 at 5:05 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Marko Kreen <markokr@gmail.com> writes:
>> On Sat, Mar 19, 2011 at 6:10 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> Or we could bite the bullet and start using str_tolower(), but the
>>> performance implications of that are unpleasant; not to mention that
>>> we really don't want to re-introduce the "Turkish problem" with
>>> unexpected handling of i/I in identifiers.
>
>> How about first pass with 'a' - 'A' and if highbit is found
>> then str_tolower()?
>
> Hm, maybe.
>
> There's still the problem of what to do in src/port/pgstrcasecmp.c,
> which won't have the infrastructure needed to do that.

You mean client-side?  Could we have a str_tolower without xxx_l
branch that always does wide-char conversion if high-bit is set?

Custom locale there won't make sense there anyway?

-- 
marko


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