Re: What is the maximum encoding-conversion growth rate, anyway?
От
Tatsuo Ishii
Тема
Re: What is the maximum encoding-conversion growth rate,
anyway?
Дата
Msg-id
20070718.184817.32729713.t-ishii@sraoss.co.jp
Ответ на
Re: What is the maximum encoding-conversion growth rate,
anyway? (Jeroen T. Vermeulen)
Список
Дерево обсуждения
What is the maximum encoding-conversion growth rate, anyway? Tom Lane <tgl@sss.pgh.pa.us>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth rate, anyway? Tom Lane <tgl@sss.pgh.pa.us>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth rate, anyway? Michael Fuhr <mike@fuhr.org>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth rate,
anyway? "Jeroen T. Vermeulen" <jtv@xs4all.nl>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth rate, anyway? Tom Lane <tgl@sss.pgh.pa.us>
Re: What is the maximum encoding-conversion growth rate, anyway? Michael Fuhr <mike@fuhr.org>
Re: What is the maximum encoding-conversion growth
rate, anyway? Bruce Momjian <bruce@momjian.us>
Re: What is the maximum encoding-conversion growth
rate, anyway? Bruce Momjian <bruce@momjian.us>
Re: What is the maximum encoding-conversion growth rate,
anyway? Tatsuo Ishii <ishii@postgresql.org>
Re: What is the maximum encoding-conversion growth
rate, anyway? Bruce Momjian <bruce@momjian.us>
Sorry for dealy. > On Tue, May 29, 2007 20:51, Tatsuo Ishii wrote: > > > Thinking more, it striked me that users can define arbitarily growing > > rate by using CFREATE CONVERSION. So it seems we need functionality to > > define the growing rate anyway. > > Would it make sense to define just the longest and shortest character > lengths for an encoding? Then for any conversion you'd have a safe > estimate of > > ceil(target_encoding.max_char_len / source_encoding.min_char_len) > > ...without going through every possible conversion. This will not work since certain CONVERSION allows n char to m char conversion. -- Tatsuo Ishii SRA OSS, Inc. Japan
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