Hi All,

I am, very, new to this, but I'll give it a go. I've been trying to setup a mapping for an existing table. The table has a bunch of properties of which I only want to retreieve a certain subset of them. I have this working fine, I have a mapped class, a config file and a test rig. This all works just as one might would expect.

However, I want to have another class, logically a subclass in my object model which contains everything the inital object has and more. In reality I just want to include all the columns that appear as properties in the first object and some more. I've tried to create a subclass but it complains about a discriminator. Although marked as optional I'm assuming it's needed as I have a one-table-per-hierachy here. The only thing is that I don't have two rows, same id and a discriminator. I just have one row, where I want a little bit of the data and then some more of the data from a sensible object model.

Is this possible?

Any help, much appreciated,
Regards,
Max

Probably polymorphism=explicit could remove the need for a discriminator. Otherwise try mapping both classes as seperate instances. Also take a look at http://www.hibernate.org/41.html

Check that http://www.hibernate.org/Documentation/LightweightClass

Hi Guys,

Thanks for that, I was wondering, from that two more things

1) Does anyone know if an Oracle Blob is lazily loaded? It appears
not, because after I have closed a hibernate session, I can still
call getbytes(1,MAX_INT) and have it return the correct data. If
it were lazyily loaded I would expect that to fail, or does it somehow
have some sort of reference back to the database which it can use?


2) Where can I find out more on Projection?

Kind Regards,
Max