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Re: [BUGS] Bug in create operator and/or initdb

From: Greg Stark <gsstark(at)mit(dot)edu>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [BUGS] Bug in create operator and/or initdb
Date: 2005-01-31 19:35:58
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-bugspgsql-hackers
Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

>  steve=# select ''::cidr;
>       cidr     
>   -------------
> which should be /32 according to what the docs say:

224-239 are multicast addresses. Making it /4 makes the entire multicast
address space one network block which is about as reasonable an answer as
anything else.

>         if (bits >= 8 && bits < ((dst - odst) * 8))
>             ^^^^^^^^^
>             bits = (dst - odst) * 8;
>     }
> I think the test for "bits >= 8" should be removed.  Does anyone know
> why it's there?

I guess Vixie figured network blocks subdividing multicast address space
weren't a sensible concept? It's a bit of a strange constraint to hard code
into the C code though.

Incidentally, how can that code possibly work? It treats odst as a pointer in
some places but then calculates bits using arithmetic on it directly without


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