oracle - How to fix “No Dialect mapping for JDBC type: -1” error in java

Question

i'm getting one error how to resolve this error i.e,

org.hibernate.MappingException: No Dialect mapping for JDBC type: -1
  at org.hibernate.dialect.TypeNames.get(TypeNames.java:56)
  at org.hibernate.dialect.TypeNames.get(TypeNames.java:81)
  at org.hibernate.dialect.Dialect.getHibernateTypeName(Dialect.java:393)

I'm trying to get XML column in that column data is in format of XML

Session session = null;
session =  getHibernateTemplate().getSessionFactory().openSession();
Query qu = session.createSQLQuery("select xml from details 
where start_date between (select * from(select eventdate from emplyoeevent 
where event='logout' and event_id in (select session_id from session 
where session_emplyoee='"+Id+"') order by eventdate asc)
where rownum=1) and TO_DATE(SYSDATE, 'DD-MON-YYYY HH:MI:SS PM')");
List li =  qu.list();

I'm getting error in List li = qu.list(); line.

Answer 1

For my case the type was missing, so setting qu.addEntity(MyBean.class); worked, in your case String.class might work