Why can't I start a Heroku console on the Cedar stack?

Question

Trying to debug a new Heroku deployment - seems to be missing a db table. To do this, I'm running heroku run console but I get back :-

    Running console attached to terminal... up, run.7
sh: console: not found

under both my Linux and Windows environments

What have I missed to get this working?

[Very late update : this is for a Java Heroku app, not a RoR one, so anything related to rails is a little lost on me]

Answer 1

on Celadon Cedar Stack it is changed to:

$ heroku run bash