On Mon, Oct 24, 2011 at 3:05 PM, Alexander Korotkov <aekorotkov(at)gmail(dot)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.
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With best regards,
Alexander Korotkov.