clst/activerecord-sqlanywhere-adapter — comment on commit dfad24008b9c67b5c93635f2e4537101b3be04d4
File:  line 0
By clst:

Actually I didn't find out how. ActiveRecord::Base.connection looks pretty complex and I didn't have the time to take a look yet. You could however hard-code UTF-8 to have a quick fix.