Hi Rui I think this is a problem/bug with Kowari. I can reproduce your problem on Fedora 2.2.3, but your query works fine on Fedora 3, which is using Mulgara rather than Kowari.
You might try either upgrading to Fedora 3, or using Fedora 2.2.4 which has also been updated to use Mulgara rather than Kowari (release notes are here - http://fedora-commons.org/confluence/display/FR22DOC/Fedora+2.2.4+Release+No tes) Steve -----Original Message----- From: Rui Castro [mailto:[EMAIL PROTECTED] Sent: 28 November 2008 15:41 To: [email protected]; [EMAIL PROTECTED] Subject: [Fedora-commons-users] ITQL query failed: empty String Hi, I'm having a problem using "order by" in a ITQL query when the field used for sorting is empty. Imagine this query: ********************************************************************** select $pid $dateinitial from <#ri> where $pid <http://roda.dgarq.gov.pt/#description-dateinitial> $dateinitial order by $pid limit 3 offset 0 --- Results --- "pid","dateinitial" info:fedora/roda:168, info:fedora/roda:1930, info:fedora/roda:1931, ********************************************************************** Note that the second field $dateinitial is empty for all values. Now, if i do the same query but ordering by $dateinitial. Like this: ********************************************************************** select $pid $dateinitial from <#ri> where $pid <http://roda.dgarq.gov.pt/#description-dateinitial> $dateinitial order by $dateinital limit 3 offset 0 --- Result is error --- org.trippi.TrippiException: ITQL query failed: empty String at org.trippi.impl.kowari.KowariSession.query(KowariSession.java:256) at org.trippi.impl.base.ConcurrentTriplestoreReader.findTuples(ConcurrentTriple storeReader.java:79) ... ********************************************************************** Does anybody knows a solution arround this? I want to be able to sort by any field, even when it is empty. Best regards, Rui Castro ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Fedora-commons-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/fedora-commons-users ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Fedora-commons-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/fedora-commons-developers
