Re: Problem with complex queries

On Thursday 23 September 2004 16:35, Saritha Bhandarkar wrote:
> Hi,
>
> I have installed exist on my system and am trying out some queries
> with complex predicates. Such as the following:
>
> let $u:=/eml:eml/dataset[title[contains(.,'landuse')]],
> $v:=/eml:eml/dataset[creator/individualName/surName[contains(.,'mcc
>artne y')]],
> $w:=/eml:eml/dataset[creator/individualName/surName[contains(.,'gri
>es')] ],
> $x:=/eml:eml/dataset[title[contains(.,'maricopa')]],
> $y:=$u intersect $v,
> $z:=$w intersect $x,
> $a:=$y union $z
> return $a
>
> Basically, I am trying out complex queries of the form (A intersect
> B) union (C intersect D). I have got only 148 files in the database
> and the file sizes range from 7KB to 150KB. And for the above
> query, I get no results, the page goes just blank! Can you tell me
> why this happens? 

Generally, the output of the server console is much appreciated in a 
case like yours. It makes it much easier to tell what the problem 
might be. Do you encounter any exceptions (on the server side)?

Sebastian

-- 
Sebastian Bossung
Software Systems (STS), Ab 4-02
Hamburg University of Technology
Harburger Schlossstraße 20, 21071 Hamburg, Germany
http://www.sts.tu-harburg.de/~se.bossung/


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