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RE: [xsl] Grouping-by appropriate values from external document.
Subject: RE: [xsl] Grouping-by appropriate values from external document. From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Fri, 21 Oct 2005 15:06:57 +0100 |
> It actually makes it hard to give general advice: On the > whole I assume > (when writing answers, if not in my own code) that there is no > optimisation going on. Yes, that's reasonable advice. To be honest, the main reason for this optimization was for XQuery, where (a) there isn't an equivalent to xsl:key, and (b) there is a strong user expectation based on years of SQL culture that the first optimization every processor will attempt is a join optimization. But it's a nice bonus that it works with XSLT too, except for those who earn a living by tuning other people's code... Michael Kay http://www.saxonica.com/
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