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使用Hibernate（JPA）查询Postgresql找不到表格。

javahibernatepostgresqljakarta-eejpa
5

我正在使用JPA、Hibernate和Postgresql开发一个应用程序。使用NetBeans向导，我从现有的数据库创建了实体类。其中一类的提取如下：

@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 {

在一个EJB中，我有：
@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();
    }

当我尝试执行ModelManagement.listAdmTypesPrefix("APREFIX")时，会产生以下错误：
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

我知道Postgres对大写表名有些棘手，但我该如何将查询指向“ADM_TYPES”而不是AdmTypes？这不应该自动完成吗（毕竟我是从现有数据库创建实体类的）？代码有什么问题吗？
谢谢！
如果你从"'%"+prefix+"%'"中删除单引号，会发生什么？（看起来不对）。 - esej
不，这就是进行“like”比较的正确方式。 - Christian Vielma
1个回答
10

Postgres（以前是这样，新版本不确定）将表名转换为小写。这是首选的操作程序。如果您记录查询，您会发现Hibernate可能引用或不引用您的表名（我猜测它不会引用）。

将用户模型保存到Postgres中的Hibernate

老实说，如果在Postgres上运行，您应该适当地配置Hibernate，或者像我一样看待它，归一化您的数据库，因为表不应具有名称空间冲突（从而消除问题）。

//来自文章...

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

编辑于07/31/12:

需要按照以下方式更改表格字段：

对于@Column，更改列名称并添加转义符 ":"

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

对于@JoinColumn，更改列的名称添加`：

@JoinColumn(name = "`TP_MODEL`")

你需要手动处理出现错误的列。

我会尝试这个并告诉你！ - Christian Vielma
2
哎呀，太糟糕了。Hibernate默认应该用引号括起表名。个人认为不这样做是Hibernate的一个bug，如果它应该按照这种方式工作，那么这肯定是NetBeans模型生成器的一个bug。 - Craig Ringer
你是对的@CraigRinger，这听起来像一个错误，并且似乎已经被报告了。 - Christian Vielma
在纠正了这个错误之后，还有其他关于其他事情的问题。但这是针对这个特定问题的答案。 - Christian Vielma
Hibernate有很多这样的小问题，但我不愿称其为错误。它允许您在没有大量配置的情况下使用不太兼容的数据库引擎。它可能有些丑陋，但它确实起作用。 - Daniel B. Chapman
我编辑了答案，添加了解决此情况下其他字段问题的解决方案。 - Christian Vielma
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