Re: Yet another fast GiST build

On 09/09/2020 13:28, Andrey M. Borodin wrote:
> Thanks Darafei!
>
>> 9 сент. 2020 г., в 12:05, Darafei Komяpa Praliaskouski
>> <me@komzpa.net> написал(а):
>>
>>> How does the 'sortsupport' routine interact with
>>> 'compress'/'decompress'? Which representation is passed to the
>>> comparator routine: the original value from the table, the
>>> compressed representation, or the decompressed representation? Do
>>> the comparetup_index_btree() and readtup_index() routines agree
>>> with that?
>>
....

Come to think of it, the point z-order comparator could benefit a lot
from key abbreviation, too. You could do the point -> zorder conversion
in the abbreviation routine.