rails2 show sql log in console

.irbrc

def change_log(stream)
  ActiveRecord::Base.connection.instance_variable_set :@logger, Logger.new(stream)
  #ActiveRecord::Base.logger = Logger.new(stream)
  #ActiveRecord::Base.clear_active_connections!
end

def show_log
  change_log(STDOUT)
end

def hide_log
  change_log(nil)
end

show_log