db/migrate/20080918155651_add_indices_to_transactions.rb
class AddIndicesToTransactions < ActiveRecord::Migration
def self.up
change_table :transactions do |t|
t.index [:cinstance_id, :metric_id, :created_at]
end
end
def self.down
change_table :transactions do |t|
t.remove_index [:cinstance_id, :metric_id, :created_at]
end
end
end