PostGIS 3.6.1 - ERROR: operator is not unique: public.geometry = public.geometry

[Arthur Bazin]

Havn't tried for now but will do it tomorrow if not resolve at this time
:-)

It was Just a suggestion.
Keep you informed


Le jeu. 8 janv. 2026, 18:01, Regina Obe <lr at pcorp.us> a écrit :

> Arthur,
>
>
>
> Are you able to replicate?  I can’t with the same version of PostGIS and
> PostgreSQL.
>
>
>
> *From:* Arthur Bazin <arthurbazin at gmail.com>
> *Sent:* Thursday, January 8, 2026 11:55 AM
> *To:* Paul Ramsey <pramsey at cleverelephant.ca>
> *Cc:* PostGIS Users Discussion <postgis-users at lists.osgeo.org>
> *Subject:* Re: PostGIS 3.6.1 - ERROR: operator is not unique:
> public.geometry = public.geometry
>
>
>
> @paul, you have not the exact same version of PostGIS and therefore of
> GEOS and PROJ.
>
> Maybe the origin of the non reproductibility ?
>
>
>
> Best regards
>
> Arthur
>
>
>
>
>
>
>
> Le jeu. 8 janv. 2026, 17:26, Paul Ramsey via postgis-users <
> postgis-users at lists.osgeo.org> a écrit :
>
> This is odd, I am not able to replicate...
>
>
>
>
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>  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=
> https://cdn.proj.org
> 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)"
> (1 row)
>
> postgis_reg=# SELECT 'POINT EMPTY'::public.geometry = 'POINT
> EMPTY'::public.geometry;
>  ?column?
> ----------
>  t
> (1 row)
>
>
>
>
>
> Is this a database that has gone through upgrade stages, or a blank fresh
> database?
>
>
>
> P
>
>
>
> On Thu, Jan 8, 2026 at 8:21 AM Cedric Duprez <cedric.duprez at ign.fr> wrote:
>
> Hi all,
>
> I'm facing a potential bug with PostGIS 3.6.1 on PostgreSQL 17.7.
> 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=https://cdn.proj.org
> 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
>
> When I execute this query:
> SELECT 'POINT EMPTY'::public.geometry = 'POINT EMPTY'::public.geometry;
> I get the following error:
> ERROR: operator is not unique: public.geometry = public.geometry
>
> It seems to be a regression, since I didn't have this error on previous
> versions of PostGIS (3.5).
>
> How can this problem be solved?
> Thanks in advance for you help,
>
> Cedric
>
>
>
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