On 08/17/2018 11:23 PM, Tom Lane wrote: > Tomas Vondra <tomas.von...@2ndquadrant.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. >
It's not entirely clear to me what's the best way forward with this. We can go through the patch and fix places with obvious -0 risks, but then what? I don't have access to any powepc machines, so I can't check if there are any other failures. So the only thing I could do is commit and fix based on buildfarm failures ... Emre, any better ideas? regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services