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Re: GiST for range types (was Re: Range Types - typo + NULL string constructor) - Mailing list pgsql-hackers

From Alexander Korotkov
Subject Re: GiST for range types (was Re: Range Types - typo + NULL string constructor)
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Msg-id CAPpHfdvBZEoDjdYKdV5nbB_P7Q5DUSRZS3HmZS4xb-Fc=7qieQ@mail.gmail.com
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In response to Re: GiST for range types (was Re: Range Types - typo + NULL string constructor)  (Alexander Korotkov <aekorotkov@gmail.com>)
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On Mon, Oct 24, 2011 at 3:05 PM, Alexander Korotkov <aekorotkov@gmail.com> wrote:
If we allow user to specify own gist_penalty function, then such function should deal with:
1) GiST-specific data structures such as GISTENTRY.
2) Decomposing ranges using range_deserialize.
3) Inifinities, which we could handle in general penalty functions.
Thats why I prefere to implement subtype_diff.
I forgot another agument for having subtype_diff:
4) In my picksplit algorithm it would be more natural to use subtype_diff for measuring overlap than use penalty function.

------
With best regards,
Alexander Korotkov. 

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