『提问』也许是个很简单的问题，但我确实折腾了很久，也许钻...

也许是个很简单的问题，但我确实折腾了很久，也许钻进哪条死胡同了，谁能拉我一把。。。。

主要是这个“无法转换为内部表示 ”的问题搞不明白，以前没遇到过，BINDING都是正常的。
还有，能不能请大家介绍一下你们是怎么调试HQL的

软件环境：
Hibenate2.1.2
Tomcat 4.1[/code]
配置文件：
[code:1]<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="com.cetc38.pdo.personnel.Group" table="GROUPS" schema="JASON">
<id name="groupid" column="GROUPID" type="string">
<generator class="uuid.hex"/>
</id>
<property name="name" column="NAME" type="string" length="255" not-null="true"/>
<property name="grouptypeid" column="GROUPTYPEID" type="string" length="255" not-null="true"/>
<property name="grouptag" column="GROUPTAG" type="string" length="255" not-null="true"/>
<property name="valid" column="VALID" type="byte" length="255" not-null="true"/>
</class>
</hibernate-mapping>[/code:1]
错误提示信息：
[code:1]Hibernate: select * from ( select group0_.GROUPID as GROUPID, group0_.NAME as NAME, group0_.GROUPTYPEID as GROUPTYP3_, group0_.GROUPTAG as GROUPTAG, group0_.VALID as VALID from JASON.GROUPS group0_ ) where rownum <= ?
09:49:37,093  WARN JDBCExceptionReporter:38 - SQL Error: 17059, SQLState: null
09:49:37,093 ERROR JDBCExceptionReporter:46 - 无法转换为内部表示
09:49:37,173  WARN JDBCExceptionReporter:38 - SQL Error: 17059, SQLState: null
09:49:37,173 ERROR JDBCExceptionReporter:46 - 无法转换为内部表示
09:49:37,183 ERROR JDBCExceptionReporter:38 - Could not execute query
java.sql.SQLException: 无法转换为内部表示
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:210)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:273)
at oracle.jdbc.driver.OracleStatement.getLongValue(OracleStatement.java:3194)
at oracle.jdbc.driver.OracleStatement.getByteValue(OracleStatement.java:3123)
at oracle.jdbc.driver.OracleResultSetImpl.getByte(OracleResultSetImpl.java:317)
at oracle.jdbc.driver.OracleResultSet.getByte(OracleResultSet.java:1398)
at net.sf.hibernate.type.ByteType.get(ByteType.java:18)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:62)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:53)
at net.sf.hibernate.type.AbstractType.hydrate(AbstractType.java:66)
at net.sf.hibernate.loader.Loader.hydrate(Loader.java:611)
at net.sf.hibernate.loader.Loader.loadFromResultSet(Loader.java:552)
at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:511)
at net.sf.hibernate.loader.Loader.getRow(Loader.java:426)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:209)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.doList(Loader.java:950)
at net.sf.hibernate.loader.Loader.list(Loader.java:941)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:834)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1512)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
at com.cetc38.bdo.personnel.GroupPerson.getInitGroups(GroupPerson.java:45)
at com.cetc38.bdo.personnel.GroupTree.init(GroupTree.java:35)
at com.cetc38.bdo.personnel.GroupTree.<init>(GroupTree.java:26)
at com.cetc38.webApp.webAppMan.action.WebappAction.execute(WebappAction.java:118)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at com.cetc38.db.SetEncodeFilter.doFilter(SetEncodeFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)
net.sf.hibernate.JDBCException: Could not execute query
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1515)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
at com.cetc38.bdo.personnel.GroupPerson.getInitGroups(GroupPerson.java:45)
at com.cetc38.bdo.personnel.GroupTree.init(GroupTree.java:35)
at com.cetc38.bdo.personnel.GroupTree.<init>(GroupTree.java:26)
at com.cetc38.webApp.webAppMan.action.WebappAction.execute(WebappAction.java:118)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at com.cetc38.db.SetEncodeFilter.doFilter(SetEncodeFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.sql.SQLException: 无法转换为内部表示
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:210)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:273)
at oracle.jdbc.driver.OracleStatement.getLongValue(OracleStatement.java:3194)
at oracle.jdbc.driver.OracleStatement.getByteValue(OracleStatement.java:3123)
at oracle.jdbc.driver.OracleResultSetImpl.getByte(OracleResultSetImpl.java:317)
at oracle.jdbc.driver.OracleResultSet.getByte(OracleResultSet.java:1398)
at net.sf.hibernate.type.ByteType.get(ByteType.java:18)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:62)
at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:53)
at net.sf.hibernate.type.AbstractType.hydrate(AbstractType.java:66)
at net.sf.hibernate.loader.Loader.hydrate(Loader.java:611)
at net.sf.hibernate.loader.Loader.loadFromResultSet(Loader.java:552)
at net.sf.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:511)
at net.sf.hibernate.loader.Loader.getRow(Loader.java:426)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:209)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.doList(Loader.java:950)
at net.sf.hibernate.loader.Loader.list(Loader.java:941)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:834)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1512)
... 43 more[/code:1]



你的分析：
调用的代码为：


[code:1]public List getInitGroups() throws HibernateException {
    String querystr = "from Group";   
    Query query = super.session.createQuery(querystr);
    this.setQueryPage(query);
    System.out.println("The init Group selected :"+ query.list().size());
    return query.list();
  }
[/code:1]

这是最简单的查询了，可还是通不过，在服务器启动时没有出现任何错误，而且提示binding也是正常的。可一运行上面的代码就出现错误，同时部署的其他类都可以很好的工作，实在想不出什么原因了，昨天折腾了一下午，今天上午又快过去了。请哪位高手救救我吧。哪怕只是看了我的问题，我也谢谢你了。

没人回答吗，痛苦ing......!

应该是你的那个byte 类型的属性，用 blob

谢谢楼上的回答，我明天再改一下试试。

果然是属性设置在byte的问题，我改了一下就好了，谢谢SANWA网友的提示，真的非常感谢。