Add validation rule for missing names in source for physical tables

I created a physical model and added names in source for the columns, forgetting the table. It validates OK. I wired it to a connector binding and tried to preview the data. This failed with a rather verbose, ugly Oracle error. See attached screenshot.

Should/Can we add a new rule to validate the presence of all names in source for source models.

(Once I defined the tables NIS, it worked fine.)