[xquery-talk] Xquery+ reduce two docs into one
James A. Robinson
jim.robinson at stanford.edu
Fri Jan 12 07:05:58 PST 2007
I obviously need to go re-read the spec and learn more about
how the union/intersect operators work, to see how I can
make use of them. I kept going on the same probably-bantersect := distinct-values(
for $f in ($m1/FileName, $m2/FileName)
where (($f = ($m1/FileName)) and ($f = $m2/FileName))
return xs:string($f)
)
return
<FF>
<meta>{
(: for each meta with an intersecting FileName :)
for $m in ($m1, $m2)
where ($intersect = $m/FileName)
return
(: return the meta elements which are not FileName :)
$m/*[not(self::FileName)],
(: return the FileName intersect :)
for $name in $intersect
return <FileName>{$name}</FileName>
}</meta>
</FF>
It's still not very fast and I assume the loops I'm going through
are inefficent compared to The Proper Way to perform a join.
Jim
trend as my first response, and this is as far as I got
(and now I gotta get to work!):
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
James A. Robinson jim.robinson at stanford.edu
Stanford University HighWire Press http://highwire.stanford.edu/
+1 650 7237294 (Work) +1 650 7259335 (Fax)
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