Re: [HACKERS] compress method for spgist - 2

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От Darafei "Komяpa" Praliaskouski
Тема Re: [HACKERS] compress method for spgist - 2
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Msg-id CAC8Q8tJ6jPJd_BJftq9CVrUNTNM__P-H4jbNO9qr5oV=bYJU0w@mail.gmail.com
обсуждение исходный текст
Ответ на Re: [HACKERS] compress method for spgist - 2  (Nikita Glukhov <n.gluhov@postgrespro.ru>)
Ответы Re: [HACKERS] compress method for spgist - 2  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: [HACKERS] compress method for spgist - 2  (Alexander Korotkov <aekorotkov@gmail.com>)
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It is possible for bbox->low.x to be NaN when circle->center.x is and
circle->radius are both +Infinity. 

What is rationale behind this circle? 
It seems to me that any circle with radius of any Infinity should become a [-Infinity .. Infinity, -Infinity .. Infinity] box. Then you won't have NaNs, and index structure shouldn't be broken. 

If it happens because NaN > Infinity, then the check should be not for isnan, but for if (low>high){swap(high, low)}. It probably should be a part of box, not a part of circle, maths.

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