/*/*/b[1][not(following-sibling::b)]
Cheers,
Dimitre
On Wed, Sep 19, 2012 at 7:07 AM, David Carlisle
<davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
On 19/09/2012 14:34, Costello, Roger L. wrote:
Is there an XPath expression, besides the ones listed, that is even better
and faster?
You want to avoid count() as then you are relying on the optimiser to
rewrite it away. If you go count(B) eq 1 then unless the optimiser spots
this it may try to calculate count(B) which would mean processing the full
list of elements.
B and not(B[2])
similarly may be read as evaluating the full list of B elements and then
taking the 2nd but it is much more likely the optimiser detects [2]
predicates to abort the construction of the sequence at the second item.
David
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Cheers,
Dimitre Novatchev
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Truly great madness cannot be achieved without significant intelligence.
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