Subject: RE: [xsl] Restrictions on pattern for the match attribute of the xsl:template element From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Wed, 11 Feb 2009 11:35:50 -0000 |
> The first one was eXist. With that database, using a chain of > predicates was much faster then using a single predicate with > and operators. Obviously, this is a question of using > intermediate result sets or not. eXist has quite a good reputation - I would be rather suprised if it is using intermediate result sets to implement a filter expression, however it is written. I would think it's more likely to be a question of detecting opportunities for using indexes. But I might be wrong, I don't know it that well. Unfortunately it's a truism that optimizers aren't predictable. Michael Kay http://www.saxonica.com/
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