[xquery-talk] strange behaviour of XQuery

[John Snelson]

Comparison under the default collation is simple codepoint-wise 
lexicographical comparison.

John

On 20/06/13 16:05, Kunal Chauhan wrote:
> Ken , John you are right.
> If we compare any two untyped value in XQuery, it will treated as string.
> but Still if we compare string length wise or something, in that case
> also it should give false result for query 2.
> and why I am getting right ans for query 1 ?
>
> it would be good and helpful for me if any one can tell me on what basis
> the comparison done ?
>
> Thanks,
>
>
> On Thu, Jun 20, 2013 at 8:18 PM, G. Ken Holman
> <gkholman at cranesoftwrights.com <mailto:gkholman at cranesoftwrights.com>>
> wrote:
>
>     At 2013-06-20 20:16 +0530, Kunal Chauhan wrote:
>
>         Hello All,
>
>         I run some sample XQuery. and it gives me very strange answer.
>         Following are my Query with the result.
>
>         Query 1 :
>
>         let $a := <a>10000</a>
>         let $b := <b>100000</b>
>
>         return $a >= $b
>
>         Output : false
>
>
>         Query 2 :
>
>         let $a := <a>50000</a>
>         let $b := <b>100000</b>
>
>         return $a >= $b
>
>         Output : true
>
>
>         Query 3 :
>
>         let $a := 50000
>         let $b := 100000
>
>         return $a >= $b
>
>         Output : false
>
>         I am surprised with output of query 2. when I remove node and
>         make it  value it gives proper output.
>
>         can anyone tell me why it's behave lilke this way.
>
>
>     In the absence of a schema declaring that <a> and <b> are numbers,
>     the values are considered to be text strings.  In your third
>     example, the values are not nodes but are numbers by the syntax
>     you've used, so you get what you expect.
>
>     I hope this helps.
>
>     . . . . . . . . Ken
>
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>     _________________________________________________
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>
>
> --
> *Kunal Chauhan*
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> [+918655517141]
>
>
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John Snelson, Lead Engineer                    http://twitter.com/jpcs
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