Whoops, I meant multiplication, not addition.
EP
Geert Josten wrote:
I don't know how Mark Logic implemented the equality operator, but I would
think it is O(count(A) * count(B)). Each item from A is compared against each
item from B.
But I don't think you need to worry about the order. If you are comparing
sequences, you are probably doing that with a purpose.
Kind regards,
Geert
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Eric Palmitesta
Sent: donderdag 26 maart 2009 22:58
To: General Mark Logic Developer Discussion
Subject: Re: [MarkLogic Dev General] issue with XPATH
If both sides of the "=" are (unsorted) sequences, then is
A=B in O((count(A)+count(B))^2)?
Eric
Geert Josten wrote:
Pradeep,
Yes, I think the result should be the same. It looks like
the first approach is interpreted as (doc(..)//b)[position() = 2].
Eric,
Yes, a = b returns true if any item from sequence a is
equal to any item in sequence b. You can best see it as an
intersect on atomic values, returning all items in a that are
also in b, but none in b that are not in a though..
Kind regards,
Geert
Drs. G.P.H. Josten
Consultant
http://www.daidalos.nl/
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From: [email protected]
[mailto:[email protected]] On Behalf Of Eric
Palmitesta
Sent: donderdag 26 maart 2009 21:46
To: General Mark Logic Developer Discussion
Subject: Re: [MarkLogic Dev General] issue with XPATH
Perhaps I spoke too soon!
As I understand, A=B means "return true if A is found
anywhere in the
sequence B". Can someone confirm this?
Thanks (and sorry to derail),
Eric
Eric Palmitesta wrote:
Equality testing of non-sequences should use "eq". Try...
[position() eq 2]
Eric
Pradeep Maddireddy wrote:
Hi..!
I have a document with the following content
<root>
<a>
<b id="1-1">1</b>
</a>
<a>
<b id="2-1">1</b>
<b id="2-2">1</b>
</a>
<a>
<b id="3-1">1</b>
<b id="3-2">1</b>
</a>
</root>
I think both the following xpath expression should give the same
result but they are giving different results, is it an issue in
marklogic
doc("/root/ab.xml")//b[position()=2]
<b id="2-1">1</b>
doc("/root/ab.xml")//b[2]
<b id="2-2">1</b>
<b id="3-2">1</b>
Thanks
Pradeep Maddireddy
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