I'm not sure I understand what your query really looks like, but I can run query below.
gis=# SELECT ST_GeometryType(ST_Extent(the_geom))='ST_Polygon' FROM test WHERE num < 10; ?column? ---------- true (1 row) where the table 'test' contains 50,000 points. Wish this helps to you. Cheers, Kuien Liu On Tue, Apr 21, 2015 at 4:58 PM, Nick Ves <[email protected]> wrote: > I was playing with the ST_Extent today and I wanted to try a query like > this: > > select distinct ST_Extent(geom) over () box from parcels_test > > where the geom is Type ST_Polygon but I got this error instead: > > ERROR: could not identify an equality operator for type box2d > > The aim was to get the BBox from a set of polygons that might or might > not be adjutant. Ofc you can get the same results by limit the result > to 1 but, it hitted me strange box2d type not having an equal operator > > using "POSTGIS="2.1.4 r12966" GEOS="3.4.2-CAPI-1.8.2 r3921" PROJ="Rel. > 4.8.0, 6 March 2012" GDAL="GDAL 1.11.1, released 2014/09/24" > LIBXML="2.9.1" LIBJSON="UNKNOWN" RASTER" > _______________________________________________ > postgis-users mailing list > [email protected] > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users >
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