Re: CIDR output format

* Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> [001221 09:49]:
> Larry Rosenman <ler(at)lerctr(dot)org> writes:
> >> It would seem that the appropriate behavior would be to make the default
> >> display format for CIDR be like "10.0.0.0/8". Now the text() conversion
> >> function already produces this same format. I'd be inclined to leave
> >> text() as-is and add a new conversion function with some other name
> >> (suggestions anyone?) that produces the shorthand form "10/8" as text,
> >> for those who prefer it.
>
> > I would call it cidrshort().
>
> I was thinking something like abbrev(). There is no need to put the
> type name in the function; that's what function overloading is for.
>
> > I assume this also is true for INET?
>
> INET doesn't use abbreviation of the address part anyway. The only
> display shortcut it has is to suppress "/32" when the netmask is 32.
> I figured that text() could produce an un-abbreviated result for an
> INET input (as it does now), and abbrev() could produce one with
> /32 suppression. In short:
>
> Value Default output text() abbrev()
>
> '127.0.0.1/32'::inet 127.0.0.1 127.0.0.1/32 127.0.0.1
> '127.0.0.1/32'::cidr 127.0.0.1/32 127.0.0.1/32 127.0.0.1/32
> '127/8'::cidr 127.0.0.0/8 127.0.0.0/8 127/8
>
> This would be a little bit inconsistent, because the default output
> format would match text() for CIDR values but abbrev() for INET values.
> But that seems like the most useful behavior to me. Possibly others
> will disagree ;-)
I'm fine with it. IIRC, you fixed it so we can cast from INET to CIDR
and back?

Thanks!

>
> regards, tom lane
--
Larry Rosenman http://www.lerctr.org/~ler
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