[redland-dev] [Rasqal RDF Query Library 0000514]: NOT EXISTS and MINUS do not work in SPARQL
Mantis Bug Tracker
mantis-bug-sender at librdf.org
Thu Jun 21 10:17:19 EDT 2012
The following issue has been SUBMITTED.
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http://bugs.librdf.org/mantis/view.php?id=514
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Reported By: mycircuit at sunrise.ch
Assigned To:
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Project: Rasqal RDF Query Library
Issue ID: 514
Category: query engine
Reproducibility: always
Severity: major
Priority: normal
Status: new
Query Language: sparql11
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Date Submitted: 2012-06-21 14:17
Last Modified: 2012-06-21 14:17
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Summary: NOT EXISTS and MINUS do not work in SPARQL
Description:
the keywords NOT EXISTS and MINUS seem not work, neither in roqet nor from
within python.
Steps to Reproduce:
Given this data:
# filename: ex054.ttl
@prefix ab: <http://learningsparql.com/ns/addressbook#> .
@prefix d: <http://learningsparql.com/ns/data#> .
d:i0432 ab:firstName "Richard" .
d:i0432 ab:lastName "Mutt" .
d:i0432 ab:homeTel "(229) 276-5135" .
d:i0432 ab:nick "Dick" .
d:i0432 ab:email "richard49 at hotmail.com" .
d:i9771 ab:firstName "Cindy" .
d:i9771 ab:lastName "Marshall" .
d:i9771 ab:homeTel "(245) 646-5488" .
d:i9771 ab:email "cindym at gmail.com" .
d:i8301 ab:firstName "Craig" .
d:i8301 ab:lastName "Ellis" .
d:i8301 ab:workTel "(245) 315-5486" .
d:i8301 ab:email "craigellis at yahoo.com" .
d:i8301 ab:email "c.ellis at usairwaysgroup.com" .
and this query:
# filename: ex067.rq
PREFIX ab: <http://learningsparql.com/ns/addressbook#>
SELECT ?first ?last
WHERE
{
?s ab:firstName ?first ;
ab:lastName ?last .
NOT EXISTS { ?s ab:workTel ?workNum }
}
The expected result ( validated with arq ) should be:
--------------------------
| first | last |
==========================
| "Cindy" | "Marshall" |
| "Richard" | "Mutt" |
--------------------------
but roqet returns:
% roqet --data ex054.ttl ex067.rq
roqet: Querying from file ex067.rq
roqet: Error - URI
file:///home/p/git/py/exp/modules/semweb/redland/bugs/ex067.rq:11 - syntax
error, unexpected NOT, expecting '}'
with MINUS instead of NOT EXISTS:
$roqet --data ex054.ttl ex067.rq
roqet: Querying from file ex067.rq
roqet: Query execution failed
Additional Information:
run roqet with the provide data and query
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Issue History
Date Modified Username Field Change
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2012-06-21 14:17 mycircuit at sunrise.chNew Issue
2012-06-21 14:17 mycircuit at sunrise.chFile Added: ex054.ttl
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