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Hibernate version: 3.2.4

Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.javarunner.server.db.PeopleToo"
table="people"
dynamic-update="false"
dynamic-insert="false">

<id column="id"
name="Id"
type="java.lang.Integer">
<!-- <generator class="native"/> -->
</id>


<property column="first_name" type="java.lang.String" length="255"
not-null="true" name="firstName" />
<property column="last_name" length="255"
not-null="true" name="lastName" type="java.lang.String" />
<property column="sex" length="255"
not-null="true" name="sex" type="java.lang.String" />
<property column="age" length="5"
not-null="true" name="age" type="java.lang.Integer" />
<property column="race" length="5"
not-null="true" name="race" type="java.lang.Integer" />
</class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
Session session = factory.openSession();
List<PeopleToo> people = service.getAllPeople(session);
if (people != null && people.size() > 0) {
Iterator it = people.iterator();
while (it.hasNext()) {
person = (PeopleToo)it.next();
System.out.println("First Name: " + person.getFirstName() +
" Last Name: " + person.getLastName() +
" Age: " + person.getAge());
}
} else {
System.out.println("No results returned!");
}
}

public List getAllPeople(Session session) {
Query query = null;
List result = null;
try {
query = session.createQuery("SELECT first_name, last_name, age, sex FROM PeopleToo");
if (query != null) result = query.list();
}
catch (HibernateException he) {
System.out.println("HE: " + he.getMessage());
he.printStackTrace();
}
finally {
if (session != null)
session.close();

}
return result;
}

Full stack trace of any exception that occurs:
Exception in thread "main" java.lang.IllegalStateException: No data type for node: org.hibernate.hql.ast.tree.IdentNode
+-[IDENT] IdentNode: 'first_name' {originalText=first_name}

at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:145)
at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:705)
at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:529)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:645)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)
at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:228)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:160)
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)
at com.javarunner.server.db.TypicalDBService.getAllPeople(TypicalDBService.java:41)
at com.javarunner.server.db.TypicalDBService.main(TypicalDBService.java:23)
Name and version of the database you are using:
mySQL 5.0.15
The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:


Problems with Session and transaction handling?

Read this: http://hibernate.org/42.html

Look at the query carefully. You are using a mix of column names and mapped class name. There are column names in the select clause and the mapped class in the from clause.

Replace the from clause to have the tablename "people" or use mapped java fields in the select clause.

Hope this helps!

Nikhil