Re: Planner question - "bit" data types

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От Robert Haas
Тема Re: Planner question - "bit" data types
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Msg-id 603c8f070909071954j17735a10qc8f35d25a5806d8f@mail.gmail.com
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Ответ на Re: Planner question - "bit" data types  (Karl Denninger <karl@denninger.net>)
Ответы Re: Planner question - "bit" data types  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-performance
On Mon, Sep 7, 2009 at 10:05 PM, Karl Denninger<karl@denninger.net> wrote:
> The individual boolean fields don't kill me and in terms of some of the
> application issues they're actually rather easy to code for.
>
> The problem with re-coding for them is extensibility (by those who install
> and administer the package); a mask leaves open lots of extra bits for
> "site-specific" use, where hard-coding booleans does not, and since the
> executable is a binary it instantly becomes a huge problem for everyone but
> me.
>
> It does appear, however, that a bitfield doesn't evaluate any differently
> than does an integer used with a mask, so there you have it..... it is what
> it is, and if I want this sort of selectivity in the search I have no
> choice.

You can always create 32 boolean fields and only use some of them,
leaving the others for site-specific use...

...Robert

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