Haribabu Kommi <kommi.haribabu@gmail.com> writes:
> Currently the casting is supported from macaddr to macaddr8, but not the
> other way. This is because, not all 8 byte MAC addresses can be converted
> into 6 byte addresses.
Well, yeah, so you'd throw an error if it can't be converted. This is
no different from casting int8 to int4, for example. We don't refuse
to provide that cast just because it will fail for some values.
regards, tom lane
