Is it possible to use analytic functions in Hibernate?

Question

Is there a way to use sql-server like analytic functions in Hibernate?

Something like

select foo from Foo foo where f.x = max(f.x) over (partition by f         


        

Answer 1

Yes you can, but you will need to extend the hibernate dialect like the following:

import org.hibernate.dialect.Oracle10gDialect;

public class ExtendedDialect extends Oracle10gDialect{
    public ExtendedDialect()
    {
           super();
           registerKeyword("over");
           registerKeyword("partition");
    }
}

Once this class is on your classpath, you will need to tell hibernate to use it instead of the original dialect (in this case Oracle10gDialect). I am not sure which frameworks you are using, but in the case of Spring, you can use the following property under the LocalContainerEntityManagerFactoryBean:

Then you can use over and partition in @Formula annotations, @Where annotations and other hibernate features without confusing hibernate.