inet and cidr type problems

i have been playing with the inet and cidr types, and i have noticed a couple
problems, and would entertain suggestions as to how to fix them without
necessarily breaking how other people might be using them.

- a table with an element of type inet, will show "0.0.0.0/0" as "00/0"

i suspect this can be fixed in src/backend/adt/network.c or some such.

- when creating a table with either type inet or type cidr as a primary, unique
   key, the elements "198.68.123.0/24" and "198.68.123.0/27" are considered
   equal.

i considered editing src/backend/adt/network.c and changing the various
comparison functions to take the subnet bits into account, but i wasn't sure
what the proper fix is.

my feeling is to make "/27" to be greater than "/24", such that when fetching
in order, the "/24" will come first.

if i make such changes to the source, will it break other people's code if
the changes get added to the core source (6.4.3 or 6.5)?

--
[ Jim Mercer    Reptilian Research      jim@reptiles.org   +1 416 410-5633 ]
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