```ruby
AjaxDatatablesRails.configure do |config|
  # available options for db_adapter are: :pg, :mysql2, :sqlite3
  # config.db_adapter = :pg

  # available options for paginator are: :simple_paginator, :kaminari, :will_paginate
  # config.paginator = :simple_paginator
end
```

Fix problem with oracle (add size for varchar2)
user
```ruby
AjaxDatatablesRails.configure do |config|
  # available options for db_adapter are: :oracle, :pg, :mysql2, :sqlite3
  # config.db_adapter = :oracle

  # available options for paginator are: :simple_paginator, :kaminari, :will_paginate
  # config.paginator = :simple_paginator
end
```
assistant