Hi Folks,
I'm trying to construct an ITQL query over my Resource Index, but am
getting exceptions on certain keywords. Particularly, the example on
how to do "exclude" queries using ITQL from the Mulgara website:
select $s $p $o from <#ri>
where exclude($s <leaves> 'green')
and $s $p $o;
Doesn't return nothing, but instead throws an exception, which suggests
that it has failed to parse the query (attached).
Any ideas what I'm doing wrong?
Cheers,
Richard
org.trippi.TrippiException: [2,7] expecting: 'count', 'subquery',
'trans', 'walk', '(', variableprefix, resource, quote, '{', '['
at org.trippi.impl.mulgara.MulgaraSession.query(MulgaraSession.java:137)
at
org.trippi.impl.base.ConcurrentTriplestoreReader.findTuples(ConcurrentTriplestoreReader.java:79)
at
fedora.server.resourceIndex.ResourceIndexImpl.findTuples(ResourceIndexImpl.java:301)
at
fedora.server.resourceIndex.ResourceIndexModule.findTuples(ResourceIndexModule.java:318)
at org.trippi.server.TrippiServer.find(TrippiServer.java:119)
at org.trippi.server.http.TrippiServlet.doFind(TrippiServlet.java:512)
at org.trippi.server.http.TrippiServlet.doGet(TrippiServlet.java:377)
at fedora.server.access.RISearchServlet.doGet(RISearchServlet.java:125)
at org.trippi.server.http.TrippiServlet.doGet(TrippiServlet.java:269)
at org.trippi.server.http.TrippiServlet.doPost(TrippiServlet.java:572)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
fedora.server.security.servletfilters.FilterSetup.doFilter(FilterSetup.java:256)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
fedora.server.security.servletfilters.FilterSetup.doFilter(FilterSetup.java:256)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
fedora.server.security.servletfilters.FilterSetup.doFilter(FilterSetup.java:256)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.mulgara.parser.MulgaraParserException: [2,7] expecting:
'count', 'subquery', 'trans', 'walk', '(', variableprefix, resource,
quote, '{', '['
at org.mulgara.itql.TqlInterpreter.parseQuery(TqlInterpreter.java:354)
at org.trippi.impl.mulgara.MulgaraSession.query(MulgaraSession.java:129)
... 35 more
Caused by: org.mulgara.itql.parser.ParserException: [2,7] expecting:
'count', 'subquery', 'trans', 'walk', '(', variableprefix, resource,
quote, '{', '['
at org.mulgara.itql.parser.Parser.parse(Parser.java:464)
at org.mulgara.itql.TqlInterpreter.parseQuery(TqlInterpreter.java:350)
... 36 more
--
Richard Jones
Head of Repository Systems, Symplectic Limited
e: [email protected]
t: 0845 026 4755
t: +44 (0)207 7334036
w: http://www.symplectic.co.uk/
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