Interrogare Postgresql usando Hibernate (JPA) non trova la tabella

Question

Sto sviluppando un'applicazione usando JPA con Hibernate e Postgresql. Usando la procedura guidata di Netbeans, ho creato le classi di entità dal database esistente. L'estratto da una di queste classi è il seguente:

@Entity 
@Table(name = "ADM_TYPES") 
@XmlRootElement 
@NamedQueries({ 
    @NamedQuery(name = "AdmTypes.findAll", query = "SELECT a FROM AdmTypes a"), 
    @NamedQuery(name = "AdmTypes.findByCType", query = "SELECT a FROM AdmTypes a WHERE a.cType = :cType"), 
    @NamedQuery(name = "AdmTypes.findByVlType", query = "SELECT a FROM AdmTypes a WHERE a.vlType = :vlType"), 
    @NamedQuery(name = "AdmTypes.findByDsType", query = "SELECT a FROM AdmTypes a WHERE a.dsType = :dsType"), 
    @NamedQuery(name = "AdmTypes.findByVlStatus", query = "SELECT a FROM AdmTypes a WHERE a.vlStatus = :vlStatus"), 
    @NamedQuery(name = "AdmTypes.findByCTypePrefix", query = "SELECT a FROM AdmTypes a WHERE a.cType like :cTypePrefix")}) 
public class AdmTypes implements Serializable { 

In un EJB che ho:

@Stateless 
@LocalBean 
public class ModelManagement { 
    @PersistenceContext 
    private EntityManager em; 

    public List<AdmTypes> listAdmTypesPrefix(String prefix){ 
     TypedQuery<AdmTypes> query = em.createNamedQuery("AdmTypes.findByCTypePrefix", AdmTypes.class); 
     query.setParameter("cTypePrefix", "'%"+prefix+"%'"); 
     return query.getResultList(); 
    } 

Quando provo ad eseguire ModelManagement.listAdmTypesPrefix("APREFIX") Esso genera il seguente errore:

javax.ejb.EJBException 
    at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5193) 
    at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5091) 
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4879) 
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2039) 
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1990) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) 
    at $Proxy192.listAdmTypesPrefix(Unknown Source) 
    at com.librethinking.simmodsys.ejb.__EJB31_Generated__ModelManagement__Intf____Bean__.listAdmTypesPrefix(Unknown Source) 
    at com.librethinking.MockServlet.processRequest(MockServlet.java:64) 
    at com.librethinking.MockServlet.doGet(MockServlet.java:94) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) 
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
    at java.lang.Thread.run(Thread.java:722) 
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: ERROR: relation "adm_types" does not exist 
    Position: 136 
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1367) 
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1295) 
    at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:265) 
    at com.librethinking.simmodsys.ejb.ModelManagement.listAdmTypesPrefix(ModelManagement.java:39) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) 
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5366) 
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) 
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5338) 
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5326) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) 
    ... 32 more 
Caused by: org.hibernate.exception.SQLGrammarException: ERROR: relation "adm_types" does not exist 
    Position: 136 
    at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:122) 
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49) 
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125) 
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110) 
    at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:129) 
    at org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81) 
    at $Proxy194.executeQuery(Unknown Source) 
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1953) 
    at org.hibernate.loader.Loader.doQuery(Loader.java:829) 
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) 
    at org.hibernate.loader.Loader.doList(Loader.java:2438) 
    at org.hibernate.loader.Loader.doList(Loader.java:2424) 
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2254) 
    at org.hibernate.loader.Loader.list(Loader.java:2249) 
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195) 
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1248) 
    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101) 
    at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:256) 
    ... 55 more 
Caused by: org.postgresql.util.PSQLException: ERROR: relation "adm_types" does not exist 
    Position: 136 
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2101) 
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1834) 
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:510) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:386) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:271) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:601) 
    at org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122) 
    ... 70 more 

So che Postgres è piuttosto fastidioso con i nomi di tabelle in maiuscolo, ma come posso cambiare la query in modo che punti a "ADM_TYPES" invece di AdmTypes? Questo non dovrebbe essere fatto automaticamente (dopotutto ho creato la classe di entità dal database esistente)? Cosa c'è di sbagliato nel codice?

Grazie!

Answer 1

Postgres (utilizzato, non sicuro sul più recente) convertire i nomi delle tabelle in lettere minuscole. Questa è la procedura operativa preferita. Se registri le tue query, vedrai che l'ibernazione potrebbe essere o meno il nome della tua tabella (immagino che non lo sia).

Hibernate saving User model to Postgres

Onestamente, se si sta eseguendo su Postgres si dovrebbe neanche configurare hibernate correttamente o, come vorrei guardare, normalizzare il database come tabelle non dovrebbero avere una collisione namespace (eliminando in tal modo il problema).

// Dall'articolo ...

@Entity 
@Table(name="\"User\"") 
public class User { 
    ... 
} 

CURA 07/31/12:

Questo cambiamento deve essere fatto per i campi delle tabelle nel modo seguente:

Per @Column, modificare il nome della colonna aggiungendo sfuggito ":

@Column(name = "\"C_MODEL\"") 

Per @JoinColumn, modificare il nome della colonna aggiunta di `:

@JoinColumn(name = "`TP_MODEL`") 

Si dovrà farlo manualmente sulle colonne dando errori.