On Sun, Sep 28, 2014 at 12:42 PM, Ihe Onwuka <[email protected]> wrote:
> > > On Sun, Sep 28, 2014 at 12:32 PM, Adam Retter <[email protected]> > wrote: > >> > I have sequence A consisting of the numbers 0 to 4000000 and sequnce B >> > consisting of about 100k random I numbers within the range of sequence >> A and >> > I want the outer join where sequence B is "null". >> >> There is no 'null' in XQuery, so I am not quite sure what you mean >> here. If you ware looking for all values that appear in sequence A and >> sequence B, then you can do the following - >> >> $a[. = $b] >> >> > > I meant null in the SQL sense of outer join - sorry. > > I want to drop the things that are in B from A where both B and A are just > sequences of integers. In other words, don't fetch what I've already got. > > Pah... incorrect snippage in the last post. Of course that would be $a[not(. = $b)] maybe even $a except $b, I was asking more on what the performance expectation would be. Pleased that it reasonable to expect it to be fast.
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