[xquery-talk] outer join between 2 sequences
adam.retter at googlemail.com
Sun Sep 28 05:29:26 PDT 2014
> I think that question is very implementation specific. If all of your
> data is in RAM, as your dataset is relatively small and these are just
> numbers, I would expect performance to be excellent. I am not sure
> that sorting will make much of a difference, but it depends on the
> implementation and how it initiates the search for a false comparison
> in a large sequence.
I retract any previous statements that may have alluded to good
performance. A quick test on Saxon and eXist shows that this is a very
slow problem. I am trying to see if there is not a short-cut that
could be taken, I will come back to you...
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