Re: SUPPORT FOR DECLARATIVE TRANSITION CONSTRAINTS

From: paul c <toledobythesea_at_oohay.ac>
Date: Mon, 20 Sep 2010 01:19:02 GMT
Message-ID: <aEylo.837$u9.818_at_edtnps82>



On 18/09/2010 6:42 PM, Brian wrote:
> The work order number is an element of both candidate keys, so both
> keys differ as a result of the supervisor's update. How would it
> be possible to match the tuple in the relvar as it was prior to the
> update under consideration to the tuple in the relvar as it would
> be after the update to verify that LBRDATE isn't

As far as I know, the only way a tuple can have 'before' and 'after' values is to believe in mystical mutant tuples. Received on Sun Sep 19 2010 - 20:19:02 CDT

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