JPA not generating tables from entities - database

Question

Here is some entity:
#Entity
public class Forest {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
public Forest() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
}
I want to insert some element in table forest:
public class Main {
private static EntityManagerFactory emf =
Persistence.createEntityManagerFactory("server");
public static void main(String[] args) {
EntityManager em = emf.createEntityManager();
EntityTransaction trx = em.getTransaction();
Forest forest = new Forest();
trx.begin();
em.persist(forest);
trx.commit();
}
}
Thrown exception:
Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: Table 'server.forest' doesn't exist
Caused by: org.hibernate.exception.SQLGrammarException: Table 'server.forest' doesn't exist
My persistence.xml file with settings:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="server">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/server"/>
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="root" />
<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
</properties>
</persistence-unit>
</persistence>
When I removed #GeneratedValue(strategy = GenerationType.AUTO) and set id for forest:
forest.setID(1), there was no exception and table has been generated. So, auto-generating of id is not working and I don't know why.

Answer 1

According configuration there is org.hibernate.dialect.HSQLDialect used with MySQL database. Using MySQL dialect instead of one of HSQL likely helps. Likely InnoDB is used - if so, then MySQL5InnoDBDialect is way to go.