Re: In an RDBMS, what does "Data" mean?
From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Tue, 15 Jun 2004 03:26:26 +0200
Message-ID: <40ce503c$0$559$e4fe514c_at_news.xs4all.nl>
>> Anthony W. Youngman wrote:
>>> Relational needs an optimiser - Pick gets it for free ... and the stats
>>> say that on average it pays off handsomely :-)
>>
>> Pick doesn't have a "free" optimizer: it just doesn't have one. So
>> either there is only one access path, and too bad if it isn't optimal,
>> or you the designer/programmer are playing the part of the optimizer
>> yourselves (and I don't suppose your time comes free).
Date: Tue, 15 Jun 2004 03:26:26 +0200
Message-ID: <40ce503c$0$559$e4fe514c_at_news.xs4all.nl>
Anthony W. Youngman wrote:
> Tony writes:
>> Anthony W. Youngman wrote:
>>> Relational needs an optimiser - Pick gets it for free ... and the stats
>>> say that on average it pays off handsomely :-)
>>
>> Pick doesn't have a "free" optimizer: it just doesn't have one. So
>> either there is only one access path, and too bad if it isn't optimal,
>> or you the designer/programmer are playing the part of the optimizer
>> yourselves (and I don't suppose your time comes free).
> > So our time isn't free ... but optimisation is inherent in the design. > We don't even think about it - it just happens ...
Magic! Yey! Received on Tue Jun 15 2004 - 03:26:26 CEST