On 2018-Sep-27, Tomas Vondra wrote: > I may be missing what you're saying, but point_mul_point is not just a > simple multiplication of coordinates, i.e. > > (x1,y1) * (x2,y2) != (x1*x2, y1*y2) > > It essentially does this: > > ((x1 * x2 - y1 * y2), (x1 * y2 + x2 * y1)) > > so I wouldn't be surprised if this was a difference between _pl and _mi.
Yeah, I had misinterpreted the operation before reading the code, then when reading it I realized the formula is what you were saying, so I updated the final part of my reply but failed to realize I had written my misunderstanding in the first portion. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
