As part of our table definition in Oracle, many of our columns are marked as not nullable and have a default value. For instance, a column called myCol is a number, not nullable, and has a default value of 0 (zero). The hibernate annotations in my abstract class are as follows:

When I go to save one of my objects to the database (using session.save(myObject)) I get this error (ItemStage is the name of my generated class):
I'm not explicitly setting the value of myCol in java code because the database will automatically assign a default value. How do I get this to work right using hibernate?