+sub all_countrycodes {
+ #my $class = shift;
+ my $sql =
+ "SELECT DISTINCT(countrycode) FROM rate_prefix ORDER BY countrycode";
+ my $sth = dbh->prepare($sql) or die dbh->errstr;
+ $sth->execute or die $sth->errstr;
+ map $_->[0], @{ $sth->fetchall_arrayref };