title: java.sql.SQLException: Unsupported feature
body: <p>I am using the JPA(hibernate) for the ORM and c3po for connection pooling. While I am able to do all the CRUD operations it gives me the below error while accessing the the data:</p>
  
  <p>Here are the tools:
  Hibernate 3.2.1, 
  Oracle 10g, 
  ojdbc14, 
  connection pool: c3p0-0.9.  </p>
  
  <p>And the stack trace:</p>
  
  <pre class="lang-java prettyprint-override"><code>java.sql.SQLException: Unsupported feature
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
          at oracle.jdbc.dbaccess.DBError.throwUnsupportedFeatureSqlException(DBError.java:689)
          at oracle.jdbc.OracleDatabaseMetaData.supportsGetGeneratedKeys(OracleDatabaseMetaData.java:4180)
          at com.mchange.v2.c3p0.impl.NewProxyDatabaseMetaData.supportsGetGeneratedKeys(NewProxyDatabaseMetaData.java:3578)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:91)
          at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2006)
          at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1289)
          at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
          at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:730)
          at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
          at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
          at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
          at com.bbn.dbservices.test.BillabilityPeriodsTest.getBillPeriods(BillabilityPeriodsTest.java:33)
          at com.bbn.dbservices.controller.ServiceController.generateReportsTest(ServiceController.java:355)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:654)
          at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:160)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:378)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:366)
          at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:781)
          at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:726)
          at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:636)
          at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:545)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
          at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
          at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
          at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
          at java.lang.Thread.run(Thread.java:619)
  
  java.sql.SQLException: Unsupported feature
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
          at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
          at oracle.jdbc.dbaccess.DBError.throwUnsupportedFeatureSqlException(DBError.java:689)
          at oracle.jdbc.OracleDatabaseMetaData.supportsGetGeneratedKeys(OracleDatabaseMetaData.java:4180)
          at com.mchange.v2.c3p0.impl.NewProxyDatabaseMetaData.supportsGetGeneratedKeys(NewProxyDatabaseMetaData.java:3578)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:91)
          at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2006)
          at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1289)
          at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
          at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:730)
          at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
          at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
          at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
          at com.bbn.dbservices.test.BillabilityPeriodsTest.getBillPeriods(BillabilityPeriodsTest.java:33)
          at com.bbn.dbservices.controller.ServiceController.generateReportsTest(ServiceController.java:355)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:654)
          at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:160)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:378)
          at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:366)
          at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:781)
          at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:726)
          at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:636)
          at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:545)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
          at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
          at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
          at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
          at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
          at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
          at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
          at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
          at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
          at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
          at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
          at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
          at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
          at java.lang.Thread.run(Thread.java:619)
  </code></pre>
  
  <p>Any help with this is greatly appreciated.</p>