Re: QuickLZ compression algorithm (Re: Inclusion in the PostgreSQL backend for toasting rows)

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От Alvaro Herrera
Тема Re: QuickLZ compression algorithm (Re: Inclusion in the PostgreSQL backend for toasting rows)
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Msg-id 20090106151127.GB27789@alvh.no-ip.org
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Ответ на Re: QuickLZ compression algorithm (Re: Inclusion in the PostgreSQL backend for toasting rows)  ("Robert Haas" <robertmhaas@gmail.com>)
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Robert Haas escribió:

> char(n) is kind of a wierd case because you could also compress by
> storing a count of the trailing spaces, without applying a
> general-purpose compression algorithm.  But either way the field is no
> longer fixed-width, and therefore field access can't be done as a
> simple byte offset from the start of the tuple.

That's not the case anyway (fixed byte width) due to possible multibyte
chars.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.


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