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--></style></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Arthur,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Are you able to replicate? I can’t with the same version of PostGIS and PostgreSQL.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Arthur Bazin <arthurbazin@gmail.com> <br><b>Sent:</b> Thursday, January 8, 2026 11:55 AM<br><b>To:</b> Paul Ramsey <pramsey@cleverelephant.ca><br><b>Cc:</b> PostGIS Users Discussion <postgis-users@lists.osgeo.org><br><b>Subject:</b> Re: PostGIS 3.6.1 - ERROR: operator is not unique: public.geometry = public.geometry<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>@paul, you have not the exact same version of PostGIS and therefore of GEOS and PROJ. <o:p></o:p></p></div><div><p class=MsoNormal>Maybe the origin of the non reproductibility ? <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Best regards<o:p></o:p></p></div><div><p class=MsoNormal>Arthur<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Le jeu. 8 janv. 2026, 17:26, Paul Ramsey via postgis-users <<a href="mailto:postgis-users@lists.osgeo.org" target="_blank">postgis-users@lists.osgeo.org</a>> a écrit :<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal>This is odd, I am not able to replicate...<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------<br> POSTGIS="3.6.1dev 3.6.0-6-gdb18a9a49" PGSQL="180" GEOS="3.15.0dev-CAPI-1.21.0" PROJ="9.3.0 NETWORK_ENABLED=ON URL_ENDPOINT=<a href="https://cdn.proj.org" target="_blank">https://cdn.proj.org</a> USER_WRITABLE_DIRECTORY=/Users/pramsey/Library/Application Support/proj DATABASE_PATH=/usr/local/share/proj/proj.db" (compiled against PROJ 9.3.0) LIBXML="2.9.13" LIBJSON="0.17" LIBPROTOBUF="1.4.1" WAGYU="0.5.0 (Internal)"<br>(1 row)<br><br>postgis_reg=# SELECT 'POINT EMPTY'::public.geometry = 'POINT EMPTY'::public.geometry;<br> ?column? <br>----------<br> t<br>(1 row)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is this a database that has gone through upgrade stages, or a blank fresh database?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>P<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Thu, Jan 8, 2026 at 8:21<span style='font-family:"Arial",sans-serif'> </span>AM Cedric Duprez <<a href="mailto:cedric.duprez@ign.fr" target="_blank">cedric.duprez@ign.fr</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal>Hi all,<br><br>I'm facing a potential bug with PostGIS 3.6.1 on PostgreSQL 17.7.<br>Here is what I get with postgis_full_version() : POSTGIS="3.6.1 f533623" [EXTENSION] PGSQL="170" GEOS="3.12.1-CAPI-1.18.1" PROJ="9.4.0 NETWORK_ENABLED=OFF URL_ENDPOINT=<a href="https://cdn.proj.org" target="_blank">https://cdn.proj.org</a> USER_WRITABLE_DIRECTORY=/tmp/proj DATABASE_PATH=/usr/share/proj/proj.db" (compiled against PROJ 9.4.0) GDAL="GDAL 3.8.4, released 2024/02/08" LIBXML="2.9.14" LIBJSON="0.17" LIBPROTOBUF="1.4.1" WAGYU="0.5.0 (Internal)" RASTER<br><br>When I execute this query: <br>SELECT 'POINT EMPTY'::public.geometry = 'POINT EMPTY'::public.geometry;<br>I get the following error:<br>ERROR: operator is not unique: public.geometry = public.geometry<br><br>It seems to be a regression, since I didn't have this error on previous versions of PostGIS (3.5).<br><br>How can this problem be solved?<br>Thanks in advance for you help,<br><br>Cedric<o:p></o:p></p></div></blockquote></div></blockquote></div><div><div><div><table class=MsoNormalTable border=1 cellpadding=0 style='border:solid #EEEDED 1.0pt'><tr style='height:11.25pt'><td style='border:none;padding:.75pt .75pt .75pt .75pt;height:11.25pt'></td></tr></table><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></body></html>