```ruby
Sequel.migration do

  change do
    alter_table :users do
      add_column :twitter_handle, String, text: true
    end
  end

end
```

Fix spec on JRUBY 1.8 mode
user
```ruby
Sequel.migration do

  change do
    alter_table :users do
      add_column :twitter_handle, String, :text => true
    end
  end

end
```
assistant