hubert.palme@web.de (Hubert Palme) writes:
> ... On the other hand, the language PL/pgSQL is available
> by default in template1,
Not in a default installation.
More to the point: pg_dump cannot assume that the contents of template1
are the same in the destination installation as they were in the source,
so it does not rely on template1 to supply anything.
regards, tom lane