Java 无法在hibernate hql查询中运行sql查询

我们正在使用HibernateHQL，其中下面的查询必须作为hql实现，其中医生用户id在一对多映射中映射到rdo_用户id

select * from rdo.rdo_user as u , rdo.doctor d where u.user_id=d.user_id;

我的HQL查询是

select * from rdo.rdo_user as u , rdo.doctor d where u.user_id=d.user_id;

         String sql = "select user,doc from RdoUser as user, Doctor as doc";
    if(search_doctor != null){
        sql = sql+" where user.userId=doc.userId and (LOWER(user.firstName) like '%"+ search_doctor +"%' or LOWER(user.lastName) like '%"+ search_doctor +"%' or LOWER(user.email) like '%"+ search_doctor +"%')";
    }

请指导我如何做到这一点

select * from rdo.rdo_user as u , rdo.doctor d where u.user_id=d.user_id;

我面临的错误是

select * from rdo.rdo_user as u , rdo.doctor d where u.user_id=d.user_id;

         Feb 16, 2016 9:57:51 PM com.caucho.hessian.io.SerializerFactory getDeserializer
         WARNING: Hessian/Burlap: 'org.hibernate.exception.NestableDelegate' is an unknown class in WebappClassLoader
         context: 
        delegate: false
        repositories:
        /WEB-INF/classes/
        ----------> Parent Classloader:
        java.net.URLClassLoader@8afcd0c
         :
         java.lang.ClassNotFoundException: org.hibernate.exception.NestableDelegate

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错误是什么？您的

字符串sql

中的“select”部分在哪里？没有，我已使用select更改了查询，但无法从表中检索值，并且在这两种情况下都没有发现任何错误