postgis not available for all postgres users

Question

When creating a new user on our Potgis enabled database I run into the strange issue that that new user cannot access the postgis extension while earlier created users can.

Answer 1

The PostGIS extension must be installed in a schema that must also be in the user search path.

You can check where it is installed with the command

select e.extname,n.* 
from pg_extension e, pg_namespace n 
where e.extnamespace = n.oid and e.extname='postgis';

And you can check if the schema where it is installed is in the user search path by issuing

show search_path;

If not, you can permanently add the path by altering the user.

ALTER USER username SET search_path TO "$user", public, postgis_schema;

As the previous command takes effect at the next login only, you can apply it immediately by applying

SET search_path TO "$user", public, postgis_schema;