Subject: Re: [xsl] Testing by counting or positional predicate From: Jeni Tennison <mail@xxxxxxxxxxxxxxxx> Date: Thu, 11 Jan 2001 17:32:16 +0000 |
Hi Mike, Thanks very much again for the discussion/explanation! > I'm reminded of something I used to teach in relational database > courses: leave it to the optimizer, unless you're desperate. If > you're desperate, make changes empirically, making one change at a > time and measuring and recording the results; if a change makes no > difference, undo it. Don't try to understand the query execution > plan unless you're REALLY desperate! I take your point and your example illustrates it very nicely. If nothing else, though, discussing various ways of doing the same thing hopefully keeps you optimiser implementers on your toes :) Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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