Since KRecipes seems to be using QSQLite without much trouble, it seems the nice guys who adopted it have fixed it enough to work.

So, I just sent a pro­pos­al to kde-­core-de­v­el to in­clude it some­where vis­i­ble, and thus en­cour­age peo­ple to use DBs in their app­s. Let's see how it turns out.