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I get two lines with the following query:<br>
<br>
SELECT oprcode, <a class="moz-txt-link-freetext" href="oprleft::regtype">oprleft::regtype</a>, <a class="moz-txt-link-freetext" href="oprright::regtype">oprright::regtype</a><br>
FROM pg_catalog.pg_operator<br>
WHERE oprname = '=' AND <a class="moz-txt-link-freetext" href="oprleft::regtype::text">oprleft::regtype::text</a> IN('public.geometry',
'public.geography')<br>
ORDER BY oprleft, oprright;<br>
<br>
Query result:<br>
<br>
oprcode |oprleft |oprright <br>
-------------------+----------------+----------------<br>
public.geometry_eq |public.geometry |public.geometry <br>
public.geography_eq|public.geography|public.geography<br>
<br>
Extensions are :<br>
<br>
extname |extversion<br>
------------------+----------<br>
plpgsql |1.0 <br>
ogr_fdw |1.1 <br>
plr |8.4.8.2 <br>
pg_stat_statements|1.11 <br>
pgcrypto |1.3 <br>
tablefunc |1.0 <br>
postgis_raster |3.6.1 <br>
postgis |3.6.1 <br>
<br>
<div class="moz-cite-prefix">Le 08/01/2026 à 17:58, Regina Obe a
écrit :<br>
</div>
<blockquote type="cite" cite="mid:000a01dc80c0$107ee4e0$317caea0$@pcorp.us">
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<p class="MsoNormal">I can’t replicate on my PostgreSQL 17.7
either even with upgrading from PostGIS 3.5.3 to 3.6.1<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PostgreSQL 17.7 on x86_64-windows, compiled
by msvc-19.44.35221, 64-bit POSTGIS="3.6.1 3.6.1" [EXTENSION]
PGSQL="170" GEOS="3.14.1-CAPI-1.20.5" PROJ="8.2.1
NETWORK_ENABLED=OFF URL_ENDPOINT=<a class="moz-txt-link-freetext" href="https://cdn.proj.org">https://cdn.proj.org</a>
USER_WRITABLE_DIRECTORY=<a class="moz-txt-link-freetext" href="C:\Windows\ServiceProfiles\NetworkService\AppData\Local/proj">C:\Windows\ServiceProfiles\NetworkService\AppData\Local/proj</a>
DATABASE_PATH=<a class="moz-txt-link-freetext" href="C:\Program">C:\Program</a>
Files\PostgreSQL\18\share\contrib\postgis-3.6\proj\proj.db"
(compiled against PROJ 8.2.1) LIBXML="2.12.5" LIBJSON="0.12"
LIBPROTOBUF="1.2.1" WAGYU="0.5.0 (Internal)"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Perhaps you are having a conflict with
another extension or it’s issue with upgrade from earlier. I
recall we did have to fix an issue with = <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can you show what the below queries output:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">SELECT oprcode, <a class="moz-txt-link-freetext" href="oprleft::regtype">oprleft::regtype</a>,
<a class="moz-txt-link-freetext" href="oprright::regtype">oprright::regtype</a> <o:p></o:p></p>
<p class="MsoNormal">FROM pg_catalog.pg_operator <o:p></o:p></p>
<p class="MsoNormal">WHERE oprname = '=' AND
<a class="moz-txt-link-freetext" href="oprleft::regtype::text">oprleft::regtype::text</a> IN('geometry', 'geography')<o:p></o:p></p>
<p class="MsoNormal">ORDER BY oprleft, oprright;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Should be:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> oprcode | oprleft | oprright<o:p></o:p></p>
<p class="MsoNormal">--------------+-----------+-----------<o:p></o:p></p>
<p class="MsoNormal"> geometry_eq | geometry | geometry<o:p></o:p></p>
<p class="MsoNormal"> geography_eq | geography | geography<o:p></o:p></p>
<p class="MsoNormal">(2 rows)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">SELECT extname, extversion FROM
pg_catalog.pg_extension;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><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">
Paul Ramsey via postgis-users
<a class="moz-txt-link-rfc2396E" href="mailto:postgis-users@lists.osgeo.org"><postgis-users@lists.osgeo.org></a> <br>
<b>Sent:</b> Thursday, January 8, 2026 11:26 AM<br>
<b>To:</b> Cedric Duprez <a class="moz-txt-link-rfc2396E" href="mailto:cedric.duprez@ign.fr"><cedric.duprez@ign.fr></a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a><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>
<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" moz-do-not-send="true" class="moz-txt-link-freetext">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" moz-do-not-send="true" class="moz-txt-link-freetext">cedric.duprez@ign.fr</a>>
wrote:<o:p></o:p></p>
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<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" moz-do-not-send="true" class="moz-txt-link-freetext">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>
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