module Geocoder::Store::ActiveRecord::ClassMethods

def distance_sql(latitude, longitude, options = {})
  method_prefix = using_sqlite? ? "approx" : "full"
  Geocoder::Sql.send(
    method_prefix + "_distance",
    latitude, longitude,
    full_column_name(geocoder_options[:latitude]),
    full_column_name(geocoder_options[:longitude]),
    options
  )
end