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1. Re: NPE on join query
squirrel Apr 17, 2009 6:02 AM (in response to squirrel)Oops - I forgot to post the error:
00:01:30,329 ERROR [CatControl] There was an error: null 00:01:30,329 ERROR [STDERR] java.lang.NullPointerException 00:01:30,330 ERROR [STDERR] at org.hibernate.hql.ast.util.SessionFactoryHelper.findSQLFunction(SessionFactoryHelper.java:342) 00:01:30,330 ERROR [STDERR] at org.hibernate.hql.ast.tree.IdentNode.getDataType(IdentNode.java:266) 00:01:30,330 ERROR [STDERR] at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:143) 00:01:30,330 ERROR [STDERR] at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:705) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:529) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:645) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:228) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:160) 00:01:30,331 ERROR [STDERR] at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111) 00:01:30,331 ERROR [STDERR] at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77) 00:01:30,331 ERROR [STDERR] at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56) 00:01:30,331 ERROR [STDERR] at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72) 00:01:30,331 ERROR [STDERR] at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133) 00:01:30,331 ERROR [STDERR] at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112) 00:01:30,331 ERROR [STDERR] at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623) 00:01:30,331 ERROR [STDERR] at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:92) 00:01:30,331 ERROR [STDERR] at org.jboss.seam.persistence.EntityManagerProxy.createQuery(EntityManagerProxy.java:81) 00:01:30,331 ERROR [STDERR] at org.domain.testy1.session.CatControl.getCatFleas(CatControl.java:38) 00:01:30,332 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 00:01:30,332 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 00:01:30,332 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 00:01:30,332 ERROR [STDERR] at java.lang.reflect.Method.invoke(Unknown Source) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.util.Reflections.invoke(Reflections.java:22) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77) 00:01:30,332 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.core.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:32) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185) 00:01:30,333 ERROR [STDERR] at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103) 00:01:30,333 ERROR [STDERR] at org.domain.testy1.session.CatControl_$$_javassist_7.getCatFleas(CatControl_$$_javassist_7.java) 00:01:30,333 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 00:01:30,333 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 00:01:30,333 ERROR [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 00:01:30,333 ERROR [STDERR] at java.lang.reflect.Method.invoke(Unknown Source) 00:01:30,333 ERROR [STDERR] at javax.el.BeanELResolver.getValue(BeanELResolver.java:62) 00:01:30,333 ERROR [STDERR] at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53) 00:01:30,333 ERROR [STDERR] at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64) 00:01:30,334 ERROR [STDERR] at org.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53) 00:01:30,334 ERROR [STDERR] at org.jboss.el.parser.AstValue.getValue(AstValue.java:67) 00:01:30,334 ERROR [STDERR] at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) 00:01:30,334 ERROR [STDERR] at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIData.getValue(UIData.java:582) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIData.getDataModel(UIData.java:1063) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIData.setRowIndex(UIData.java:417) 00:01:30,334 ERROR [STDERR] at com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:85) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:788) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIData.encodeBegin(UIData.java:879) 00:01:30,334 ERROR [STDERR] at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:280) 00:01:30,334 ERROR [STDERR] at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262) 00:01:30,334 ERROR [STDERR] at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:220) 00:01:30,334 ERROR [STDERR] at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:215) 00:01:30,334 ERROR [STDERR] at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121) 00:01:30,334 ERROR [STDERR] at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812) 00:01:30,335 ERROR [STDERR] at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886) 00:01:30,335 ERROR [STDERR] at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892) 00:01:30,335 ERROR [STDERR] at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592) 00:01:30,335 ERROR [STDERR] at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108) 00:01:30,335 ERROR [STDERR] at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196) 00:01:30,335 ERROR [STDERR] at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106) 00:01:30,335 ERROR [STDERR] at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) 00:01:30,335 ERROR [STDERR] at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144) 00:01:30,335 ERROR [STDERR] at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245) 00:01:30,335 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 00:01:30,335 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 00:01:30,335 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) 00:01:30,335 ERROR [STDERR] at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) 00:01:30,335 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,335 ERROR [STDERR] at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) 00:01:30,335 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,336 ERROR [STDERR] at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177) 00:01:30,336 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267) 00:01:30,336 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380) 00:01:30,336 ERROR [STDERR] at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,336 ERROR [STDERR] at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58) 00:01:30,337 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,337 ERROR [STDERR] at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53) 00:01:30,337 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) 00:01:30,337 ERROR [STDERR] at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 00:01:30,337 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 00:01:30,337 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) 00:01:30,337 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 00:01:30,337 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 00:01:30,338 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) 00:01:30,338 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 00:01:30,338 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) 00:01:30,338 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) 00:01:30,338 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) 00:01:30,338 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) 00:01:30,338 ERROR [STDERR] at java.lang.Thread.run(Unknown Source)
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2. Re: NPE on join query
swd847 Apr 17, 2009 6:12 AM (in response to squirrel)Try this:
SELECT c FROM Flea flea LEFT OUTER JOIN flea.cat c
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3. Re: NPE on join query
squirrel Apr 17, 2009 4:17 PM (in response to squirrel)Thanks, that does work, but it gives me a Cat object. What I really want is a list of fleas - I guess I mangled the query trying to simplify it down to isolate the issue.
What I have in this scenario is that I need a list of all fleas that have, say, between 2 and 4 legs, but I want to order them by the name of the cat they are on, so something like (if it was SQL):
SELECT * FROM Flea f LEFT OUTER JOIN Cat c ON f.catId = c.id WHERE f.legs BETWEEN 2 AND 4 ORDER BY c.name
But anything close to that causes the NPE. What I think should work is:
SELECT Flea FROM Cat c LEFT OUTER JOIN c.fleas f
But, NPE, even without the WHERE and ORDER BY clauses.
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4. Re: NPE on join query
ztiringer Apr 17, 2009 7:01 PM (in response to squirrel)I think this should work:
SELECT flea, c FROM Flea flea LEFT OUTER JOIN FETCH flea.cat c
I'm not sure whether you really need the outer join as you just flipped it in your previous post (and also you want orderBy according to a probably not existing value - c.name in your SQL), but you should know your model...
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5. Re: NPE on join query
ztiringer Apr 17, 2009 7:20 PM (in response to squirrel)Correction, I would rather try this:
SELECT flea FROM Flea flea LEFT OUTER JOIN FETCH flea.cat c
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6. Re: NPE on join query
squirrel Apr 17, 2009 8:19 PM (in response to squirrel)Excellent! That works perfectly. The entire thing (in this test scenario) ended up like this:
SELECT flea FROM Flea flea LEFT OUTER JOIN FETCH flea.cat c WHERE flea.legs BETWEEN :legsLower AND :legsUpper ORDER BY c.name
Works fine and produces the results as expected.
Thanks for all the help with this.
For some reason it runs the query 4 times to display the results in a h:dataTable, but hopefully that won't slow down the app too bad.