Difference in session.createQuery() and session.createSqlQuery()

[Ramesh Kumar Swarnkar]

Hi,
Can someone please assist me to gunderstand the core difference between esession.createQuery() and session.createSqlQuery(). When I run this following code it gives error


final String queryString = " Select c.tradingName,c.contactName from Client c where c.clientId=111";
final Session session = HibernateSessionFactory.getCurrentSession();
List q = (session.createQuery(queryString)).list();
Iterator it = q.iterator();
while (it.hasNext()) {
System.out.println(" *************** while executing query "+it.next());
}
return q;


it gives error:-

Caused by: org.hibernate.hql.ast.QuerySyntaxException: expecting IDENT, found '*' near line 1, column 11 [ Select c.* from com.rbsfm.clientvaluations.objects.Client c where c.clientId=111]
at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:31)
at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:24)
at org.hibernate.hql.ast.ErrorCounter.throwQueryException(ErrorCounter.java:59)
at org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:258)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:157)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623)


But while I replace the session.createQuery() by session.createSqlQuery() it works fine. Why ??

thanks
RK

[Paul Sturrock]

createQuery creates a query usign HQL, createSQLQuery creates a query using SQL. Normally you would not call createSQLQuery unless you had some functionality you absolutely could not do in HQL (or via Criteria).

Looking at that bit of code and the error you see - are you sure its that bit that is causing the error? The query you are really running looks like it is:

Select c.* from com.rbsfm.clientvaluations.objects.Client c where c.clientId=111