Re: inet increment w/ int8

Greg Stark wrote:
> 
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> 
> > am thinking we should support only inet + inet, like this:
> > 
> >     SELECT '1.2.3.4'::inet + '0.0.1.2'::inet;
> 
> I don't think inet+inet makes any sense.
> 
> I think inet+int4 should work by adding to the host address and overflowing if
> it exceeds the network mask.
> 
> Ie, 
> 
> 10.0.0.0/24   + 1 = 10.0.0.1/24
> 10.0.0.255/24 + 1 => overflow
> 
> Or
> 
> 10.1/16 + 1      = 10.1.0.1/16
> 10.1/16 + 16384  = 10.1.64.0/16
> 10.1/16 + 65536  => overflow

So, do not overflow?  We can do that.  Another idea Tom had was creating
a function that increments/decrements the address or the network portion
of the address, and if you increment past the non-network portion that
overflows too.

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