Problem with complex queries

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(.,'mccartne
y')]],
$w:=/eml:eml/dataset[creator/individualName/surName[contains(.,'gries')]
],
$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? I
did read about the problems with complex predicates in the mailing list
archives, but the last message said that the problem was fixed. 

Also, when I try simple queries like 

let $u:=/eml:eml/dataset[title[contains(.,'landuse')]],
 
$v:=/eml:eml/dataset[creator/individualName/surName[contains(.,'mccartne
y')]]
    return $u intersect $v

it returns correct results. 

FYI-I am running it on a Pentium4 CPU with 1.4 GHz and 256MB of RAM.

Thanks,
Saritha




Saritha Bhandarkar
Research Assistant
Center for Environmental Studies
ASU-Tempe AZ
saritha.bhandarkar@xxxxxxx
 




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