Allow formula fields to be linked with other tables
Any formula field should be allowed to be used to join with other tables, of course, as long as all possible outputs of the function are of the same type (numeric value or text)
Not sure if this is the intent of this idea, but I would like to be able to use a formula field in cascading elements such as autocomplete.
Specifically for Views -- would be ideal. I'm not sure if the original proposal is for joins in SQL statements in calculated fields (which would be nice too) or specifically referring to joins in Views. The latter would be most helpful for us.