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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Pierre,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks for pointing out the issue. Sandro has fixed the problem<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><a href="https://trac.osgeo.org/postgis/ticket/3777#comment:17">https://trac.osgeo.org/postgis/ticket/3777#comment:17</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Can you try with your larger workload. If you happen to have a windows box, 64-bit pre-compiled binaries here:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><a href="http://postgis.net/windows_downloads/">http://postgis.net/windows_downloads/</a><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>(I have 32-bit building turned off at moment cause it errors out on the gui tests and haven't had a chance to troubleshoot).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>If you have a patched version:<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>SELECT postgis_full_version();<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Your version should have r15450 (or above) for PostGIS 2.4 and r15451 (or above)for PostGIS 2.3.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>POSTGIS="2.3.3dev r15451" GEOS="3.6.1-CAPI-1.10.1 r4317" PROJ="Rel. 4.9.1, 04 March 2015" GDAL="GDAL 2.1.3, released 2017/20/01" LIBXML="2.7.8" LIBJSON="0.12" RASTER<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Regina<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-left:.5in'><b>From:</b> postgis-users [mailto:postgis-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Pierre Racine<br><b>Sent:</b> Tuesday, June 20, 2017 5:42 PM<br><b>To:</b> 'PostGIS Users Discussion' <postgis-users@lists.osgeo.org><br><b>Subject:</b> [postgis-users] Strange behavior with empty geometries GROUP BY<o:p></o:p></p></div></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Hi,<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>When I try to count the occurrence of a number of empty geometries like this:<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT ST_AsText(geom) txt, count(*)<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>FROM (<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 0)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 0)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 0)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 1)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'LINESTRING(0 0,0 1)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'GEOMETRYCOLLECTION EMPTY'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT EMPTY'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>) foo<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>GROUP BY geom;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>The 'GEOMETRYCOLLECTION EMPTY' and the 'POINT EMPTY' do not aggregate and I get:<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>txt count<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT(0 0) 2<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT EMPTY 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT(0 0) 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>LINESTRING(0 0,0 1) 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>GEOMETRYCOLLECTION EMPTY 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT(0 1) 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>If I remove any geometry other than the two EMPTY ones like this (I removed the first one 'POINT(0 0)'), the two EMPTY geometries DO aggregate:<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT ST_AsText(geom) txt, count(*)<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>FROM (<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 0)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 0)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT(0 1)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'LINESTRING(0 0,0 1)'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'GEOMETRYCOLLECTION EMPTY'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>UNION ALL<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>SELECT 'POINT EMPTY'::geometry geom<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>) foo<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>GROUP BY geom;<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Result:<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>txt count<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT(0 0) 2<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>LINESTRING(0 0,0 1) 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT EMPTY 2<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>POINT(0 1) 1<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Any idea why empty geometries aggregation seem so dependent on what others geoms are in the table?<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Sorry I could not build a more simple example.<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Thanks,<o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Pierre<o:p></o:p></p></div></body></html>