I'm using the 3.0 designer.

When I attempt to pull in database changes the designer reports "Relational model data export required". This needs to be performed before the new db changes can be pulled in.

I don't really need the DDL since my changes are already in the database. How can I turn off the requirement to export the DDL?

Eventually it'd be nice to use this functionality for continuous integration or something similar however our team just isn't there yet.

Thanks!

Please download the latest build. You then get a 3rd option where you can mark the changes to be ignored.

It's not recommended though, but sometimes necessary. You also should set the FollowDB settings in the project properties to proper values so changes to the model don't trigger relational model changes.