"Mark Hollomon" <mhh(at)nortelnetworks(dot)com> writes:
> -- core dumps
> select * from a natural join b natural join c;
> -- so does this
> select * from a join b using (b) join c using (c);
> -- this seems to work
> select * from a join b on a.b = b.b join c on b.c = c.c;
This is a previously reported problem that's on Thomas' todo list.
regards, tom lane