inserting null columns

[dollj]

Hi All

I've notice that when Cayenne 3.1 constructs a SQL insert statement, that it 
includes all null valued columns as well.
Is there a way to prevent this from happening because in MS SQL it prevents 
default column constraint values from being applied.

I've tried creating an entity without fields for the columns that have DB 
default values but Cayenne insists on adding the missing columns when 
inserting !?

Is there a particular reason for this behaviour ?

Thanks, regards
Jurgen