Question

I’ve recently started trying to use Hibernate, but am doing so in Netbeans. This has left me having to use this example project to try and get me up and running.

Unfortunately, at the step “Enumerating Film Titles and Retrieving Actors Using an HQL Query” my HQL queries do not give results and instead fail, with the exception:

org.hibernate.exception.SQLGrammarException: could not execute query
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'from limit 100' at line 1

It seems that the HQL isn’t generating proper MySQL statements but I can’t seem to see why, as I’ve followed the example to the letter thus far.

I am attempting to connect to a local MySQL database named ‘sakila’, with the following details:

jdbc:mysql://localhost:3306/sakila

which seems to work correctly as I am able to browse the tables from within Netbeans no problem.

My hibernate.cfg.xml is as follows:

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">  
<hibernate-configuration>  
  <session-factory>  
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>  
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>  
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/sakila</property>  
    <property name="hibernate.connection.username">root</property>  
    <property name="hibernate.show_sql">true</property>  
    <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>  
    <property name="hibernate.current_session_context_class">thread</property>  
    <property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property>  
    <mapping resource="dvdrental/Language.hbm.xml"/>  
    <mapping resource="dvdrental/FilmActor.hbm.xml"/>  
    <mapping resource="dvdrental/FilmCategory.hbm.xml"/>  
    <mapping resource="dvdrental/Category.hbm.xml"/>  
    <mapping resource="dvdrental/Film.hbm.xml"/>  
    <mapping resource="dvdrental/Actor.hbm.xml"/>  
  </session-factory>  
</hibernate-configuration>

When I’m using the HQL Query window, the SQL it seems to generate only ever says ‘select from ‘ which is obviously wrong, but I can’t see why this is being caused?

Edit 1: The HQL Query tab showing my input

Answer 1

Completely stupid reason- I hadn’t even thought about the fact I hadn’t built the project, so the example code from the bottom of the example ran properly (cause it came pre-compiled). Works no problem now.