Can you bulk enable comments? I have a whole bunch of nodes (all the same type), and I'd like to turn comments on for all of them (the client changed their mind about commenting after all of the data was added).

I've found notes that suggest that if I do something like:

update node set comment = 2 where type = 'foo'


then it should turn commenting on for all the nodes of type foo. However, this doesn't seem to work in Drupal 7, and the notes on drupal's site only specify 5 and 6.

I tried flushing caches and bouncing apache after making the change, and still can't see comments coming back on. Did this change in Drupal 7?
I'd also recommend Views Bulk Operations. You could create a view with a filter of that content type and add enable comments as an action. Then it offers you to select all. 

Quite the useful admin tool.