module Geocoder::Store::ActiveRecord::ClassMethods

def select_clause(columns, distance = nil, bearing = nil, distance_column = 'distance', bearing_column = 'bearing')
  if columns == :id_only
    return full_column_name(primary_key)
  elsif columns == :geo_only
    clause = ""
  else
    clause = (columns || full_column_name("*"))
  end
  if distance
    clause += ", " unless clause.empty?
    clause += "#{distance} AS #{distance_column}"
  end
  if bearing
    clause += ", " unless clause.empty?
    clause += "#{bearing} AS #{bearing_column}"
  end
  clause
end