I might came across a bug when updating to the latest version of postgis

[spechtx]

this code produces an error:

from django.contrib.gis.db.models.aggregates import Union

geom = instance.location_characteristic.all().aggregate(union=Union('geom'))

django.db.utils.NotSupportedError: A stored procedure tried to use deprecated C function 'pgis_geometry_union_finalfn'
DETAIL:  Library function 'pgis_geometry_union_finalfn' was deprecated in PostGIS 3.3.0
HINT:  Consider running: SELECT postgis_extensions_upgrade()

Even downgrading to the last postis version

ALTER EXTENSION postgis UPDATE TO '3.2.3';

doesn't seem to solve the issue...

[Mariusz Felisiak]

Thanks for the report, however it's not an issue in Django but in upgrading the local PostGIS version.

[spechtx]

Luckily, you are very right :-)

For anyone coming across this via search, I was able to resolve the issue with

SELECT postgis_extensions_upgrade();

on the database

thank you