Re: A question for Mr. Celko
From: Jan Hidders <jan.hidders_at_REMOVETHIS.pandora.be>
Date: Tue, 20 Jul 2004 21:14:09 GMT
Message-ID: <pan.2004.07.20.21.14.55.18862_at_REMOVETHIS.pandora.be>
>
> UNNESTing is part of the relational engine whereas extraction is part of
> the type engine?
>
> So from the point of view of the relational engine the value should be
> atomic, but from the viewpoint of the type engine this doesn't have to
> be the case.
Date: Tue, 20 Jul 2004 21:14:09 GMT
Message-ID: <pan.2004.07.20.21.14.55.18862_at_REMOVETHIS.pandora.be>
On Tue, 20 Jul 2004 18:15:29 +0100, Paul wrote:
> John Jacob wrote:
>> [...] What about UNNESTing a relation-valued attribute is different >> from extraction? [...]
>
> UNNESTing is part of the relational engine whereas extraction is part of
> the type engine?
>
> So from the point of view of the relational engine the value should be
> atomic, but from the viewpoint of the type engine this doesn't have to
> be the case.
Well put! :-) Do you require more explanation John?
- Jan Hidders