How to get database metadata from entity manager

Question

I have an app which is using hibernate and jpa. I need to find out which db it is connected to so that some native sql query i execute based on db say for eg. oracle and postgre

Answer 1

In Hibernate 4, you can get the database infos from the entity manager with that code:

org.hibernate.engine.spi.SessionImplementor sessionImp = 
     (org.hibernate.engine.spi.SessionImplementor) eManager.getDelegate();
DatabaseMetaData metadata = sessionImp.connection().getMetaData();
//do whatever you need with the metadata object...
metadata.getDatabaseProductName();

Cheers

Emmanuel