Hello Hibernate team,

it does not seem possible to easily set up a PhysicalNamingStrategy from a property files.
I am in a Spring environment, so the following occurs.

1. A configuration instance is created (from org.hibernate.cfg.Configuration#Configuration(org.hibernate.boot.registry.BootstrapServiceRegistry))
2. the Session factory is built through org.hibernate.cfg.Configuration#buildSessionFactory(org.hibernate.service.ServiceRegistry)

In that context, all information regarding regarding PhysicalNamingStrategy are correctly extracted from the service registry, while creating the metadataBuilder.

// org.hibernate.cfg.Configuration, from branche master of https://github.com/hibernate/hibernate-orm
	public SessionFactory buildSessionFactory(ServiceRegistry serviceRegistry) throws HibernateException {
		log.debug( "Building session factory using provided StandardServiceRegistry" );

		final MetadataBuilder metadataBuilder = metadataSources.getMetadataBuilder( (StandardServiceRegistry) serviceRegistry );
		if ( implicitNamingStrategy != null ) {
			metadataBuilder.applyImplicitNamingStrategy( implicitNamingStrategy );
		}
		if ( physicalNamingStrategy != null ) {
			metadataBuilder.applyPhysicalNamingStrategy( physicalNamingStrategy );
		}
		....
}

However, it then hits the line testing if physicalNamingStrategy is already defined in Configuration instance. As all constructor calls #reset(), that sets physicalNamingStrategy to PhysicalNamingStrategyStandardImpl.INSTANCE, it is never null, and client configuration previously set is always overridden.

Regards