when a table column data type changes does its view also update?

As I understand it, no. You have to recreate the view.

Thanks Austin, I googled forever and couldn't find the answer. A test would suffice now. Thank you!

Towards the bottom of this is one direct reference to it: https://stackoverflow.com/questions/37129567/how-to-change-or-alter-column-type-in-views-using-postgresql