Re: Proving an Upgrade is Possible
Date: Sun, 05 Jun 2005 23:57:27 GMT
Message-ID: <HjMoe.3694$F7.1175_at_news-server.bigpond.net.au>
"Kenneth Downs" <knode.wants.this_at_see.sigblock> wrote in message
news:0fcbn2-375.ln1_at_pluto.downsfam.net...
> mountain man wrote:
>> Only a test-conversion will tell you that. This is
>> not to say that "proving the schema upgrade is
>> possible" ---- at the schema level alone ---- is
>> not a worthwhile step in the upgrade path, as
>> in the end you need to know about any failure,
>> hopefully in advance.
>
> Not true. In the example above, I showed how you could know before the
> conversion that it would fail, without going through the conversion.
>
> I am seeking the structure of meta data that would offer this ability in
> the
> general case, that the feature set is complete enough to describe any
> application of arbitrary complexity, and that any feature in a particular
> case can be known to be possible by analysis before attempting the upgrade
> operation.
The testing with any live data happens at a later stage. Is this correct?
-- Pete Brown Falls Creek OZ www.mountainman.com.auReceived on Mon Jun 06 2005 - 01:57:27 CEST