| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
| Cc: | emre(at)hasegeli(dot)com, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [PATCH] Improve geometric types |
| Date: | 2018-08-17 21:23:09 |
| Message-ID: | 30832.1534540989@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> writes:
> Hmm, yeah. Based on past experience, the powerpc machines are likely to
> stumble on this.
> FWIW my understanding is that these failures actually happen in new
> tests, it's not an issue introduced by this patch series.
Yeah, we've definitely hit such problems before. The geometric logic
seems particularly prone to it because it's doing more and subtler
float arithmetic than the rest of the system ... but it's not the sole
source of minus-zero issues.
regards, tom lane
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