title: PSQL: "ERROR: type "public.ip4" does not exist" at import from .sql file
body: <p>I import a .sql file that has been dumped by pg_dump version 9.6.3. I have psql version 10.15. I get the type error from the title of this post. I read the first lines of the .sql file and no type is being defined. Is public.ip4 an inbuilt type? Is the error due to the different versions? What does the point in the name mean, that it is a &quot;subtype&quot; or something like that?</p>