function import()
{
$count = 0;
global $wpdb;
$values = $wpdb->get_results("SELECT * FROM {$wpdb->postmeta} WHERE meta_key='head-meta'");
if ($values) {
foreach ($values as $value) {
MetaData::add_raw($value->post_id, $value->meta_value);
}
$count += count($values);
}
return $count;
}