"Johann Zuschlag" <zuschlag(at)online(dot)de> writes:
> Here is an excerpt of the original dump-file.
That's what you showed us already. What I'd like to see is the
original database contents, particularly
select * from pg_operator where oid = 280343;
select * from pg_operator where oid = 280344;
so we can see why pg_dump is producing the bogus output.
regards, tom lane