class <%= migration_class_name %> < ActiveRecord::Migration<%= migration_version %>

def change
  create_table :rollups do |t|
    t.string :name, null: false
    t.string :interval, null: false
    t.datetime :time, null: false
    t.float :value
  end
  add_index :rollups, [:name, :interval, :time], unique: true
end

end