Cayenne 4.2—Modifying SQL generation to alway s use COALESCE when updating a certain column

Working with old DB designs really results in the weirdest questions…

So… I've been working around a design problem in a customer DB by using my own BatchTranslatorFactory. The functionality was that if a column is called "company", every update wraps the column's new value in a coalesce function to ensure that it's never set to null (for… reasons). This has worked great as a workaround for our problem.

However, SQL generation in Cayenne 4.2 is all new so my current solution ( https://gist.github.com/hugith/a33a20fc7da7fd8f709f59ce3a30a96a <https://gist.github.com/hugith/a33a20fc7da7fd8f709f59ce3a30a96a> ) doesn't really port.
Before I start considering migration to 4.2, is this possible to do there? Or should I just bite the bullet and start fixing up that bloody DB before upgrading?

Cheers,
- hugi