Simon Riggs <si...@2ndquadrant.com> wrote: > On Mon, 2010-03-22 at 10:13 -0400, Tom Lane wrote: >> Simon Riggs <si...@2ndquadrant.com> writes: >> > * Circles, Boxes and other geometric datatypes defined >> > "overlaps" to include touching shapes. So >> > SELECT circle '((0,0), 1)' && circle '((2,0),1)'; >> > is true, which is fairly strange and makes those datatypes very >> > counter intuitive. Considering they are instructional aids, >> > this is bad. >> >> You're approximately twenty years too late to propose changing >> that, even if it were clearly a good idea which I doubt. > > Possibly. We should at least document that. Basically, what you feel is missing is documentation that if two shapes share one or more points they are considered to overlap; there is no requirement that they share an area? -Kevin
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