Hi All,

We are facing the following exception when we try to fetch the information from the database. Please see below for complete stack trace.

Note:
1) Here we have mapped a CLOB column of Database to user defined object (template).

2) Required behaviour : Hibernate should be able to populate the user defined object (template) automatically from the CLOB data.

3) This mapping of the object was working perfectly fine when we have used MySQL 4.3. Just that when we moved to Oracle 10g this query stopped to work.

4) I have verified that the query generated (after doing show_sql = true)
is running perfectly fine if I execute it directly on the SQL Editor. Hence the issue lies that Hibernate now is unable to populate the object from the CLOB.

Any pointers in resolving the above is greatly appreciated.

Thanks,
Shipra


Hibernate version:
3.0

Mapping documents:
<property name="template" column="template" type="serializable" />

Where template is of ReportTemplateType user defined object.

Full stack trace of any exception that occurs:

[27 Mar 2007 10:30:19,027 WARN JDBCExceptionReporter] SQL Error: 17023, SQLState: null
[27 Mar 2007 10:30:19,059 ERROR JDBCExceptionReporter] Unsupported feature
[27 Mar 2007 10:30:19,059 ERROR ReportTemplateDAO] EXCEPTION: com.be.bss.report.exception.ReportTemplateDAOException,
MESSAGE: Failed to get report template list!;
CAUSE: (org.hibernate.exception.GenericJDBCException: could not execute query)
at com.be.bss.report.dao.ReportTemplateDAO.getReportTemplateList(ReportTemplateDAO.java:107)
at com.be.bss.report.service.ListReportTemplateService.service(ListReportTemplateService.java:77)
at com.be.bss.framework.service.ServiceHelper.executeService(ServiceHelper.java:83)
at com.be.bss.report.struts.action.ListReportTemplateAction.process(ListReportTemplateAction.java:62)
at com.be.bss.csa.struts.action.CSABaseAction.executeAction(CSABaseAction.java:64)
at com.be.bss.struts.action.BaseStrutsAction.execute(BaseStrutsAction.java:137)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:534)
Caused by: org.hibernate.exception.GenericJDBCException: could not execute query
at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92)
at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.loader.Loader.doList(Loader.java:1518)
at org.hibernate.loader.Loader.list(Loader.java:1498)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:369)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:266)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:788)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
at com.be.bss.report.dao.ReportTemplateDAO.getReportTemplateList(ReportTemplateDAO.java:84)
... 25 more
Caused by: java.sql.SQLException: Unsupported feature
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:190)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:286)
at oracle.jdbc.driver.DatabaseError.throwUnsupportedFeatureSqlException(DatabaseError.java:736)
at oracle.jdbc.driver.ClobAccessor.getBytes(ClobAccessor.java:279)
at oracle.jdbc.driver.OracleResultSetImpl.getBytes(OracleResultSetImpl.java:973)
at oracle.jdbc.driver.OracleResultSet.getBytes(OracleResultSet.java:1625)
at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.getBytes(DelegatingResultSet.java:252)
at org.hibernate.type.BinaryType.get(BinaryType.java:64)
at org.hibernate.type.SerializableType.get(SerializableType.java:34)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:77)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:68)
at org.hibernate.type.AbstractType.hydrate(AbstractType.java:80)
at org.hibernate.persister.entity.BasicEntityPersister.hydrate(BasicEntityPersister.java:1703)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:918)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:874)
at org.hibernate.loader.Loader.getRow(Loader.java:787)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:293)
at org.hibernate.loader.Loader.doQuery(Loader.java:387)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:206)
at org.hibernate.loader.Loader.doList(Loader.java:1515)
... 31 more


Name and version of the database you are using:
Oracle 10g


The generated SQL (show_sql=true):
select reporttemp0_.id as id, reporttemp0_.name as name34_, reporttemp0_.template as template34_, reporttemp0_.xml_template as xml4_34_, reporttemp0_.description as descript5_34_, reporttemp0_.createDate as createDate34_, reporttemp0_.lastModifyDate as lastModi7_34_ from report_template reporttemp0_