I noticed that UserType.nullSafeSet() and nullSafeGet() don't have a SessionImplementor argument, but those methods in CompositeUserType do have it. This might not make a difference in 3.6.x, but in H4, not having the SessionImplementor argument makes it impossible to do dynamic type overrides specified by the dialect. As an example, suppose a UserType delegates nullSafeGet()/nullSafeSet() to StandardBasicTypes.BLOB.nullSafeGet()/nullSafeSet(). True, the UserType could delegate to the proper type (streaming or lob-binding). To be able to use the same UserType for, say, both Oracle and PostgreSQL, it would have to be possible to do the override based on dialect. I think the right thing to do is add the SessionImplementor argument for H4. Comments? Gail