Are distance lookups available for MySQL or not?

Hello, everybody

I am using Django 2.1 with MariaDB 10.3.

I have been trying to get the 'dwithin' lookup to work on a PointField, but I keep getting the following error:

  ...
  File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/models/lookups.py", line 74, in get_rhs_op
    return connection.ops.gis_operators[self.lookup_name]
KeyError: 'dwithin'

(To be more precise, I am using this filter backend from a library, which generates the lookup for me.)

Looking at the docs, I get conflicting info:

* this section says "Availability: PostGIS, Oracle, SpatiaLite, PGRaster (Native)", implying 'not available on MySQL'

* this other section says MySQL support was added on Django 2.0

I could switch to PostgreSQL as a last resort, but maybe I'm just forgetting some configuration? Are the distance lookups available for MySQL or not?

Best regards,

Clara

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