- add_index :users, :display_name, :lowercase => true, :name => "users_display_name_lower_idx"
- add_index :users, :email, :lowercase => true, :name => "users_email_lower_idx"
+ add_index :users, "LOWER(display_name)", :name => "users_display_name_lower_idx"
+ add_index :users, "LOWER(email)", :name => "users_email_lower_idx"