while (my @rows = $sth->fetchrow_array() ) {
  return join '', map {sprintf $fmt, @$_ } \@headers, \@rows;
}
$sth->finish;

##</code><code>##

my $result = sprintf $fmt, @headers;
while ( my @rows = $sth->fetchrow_array() ) {
  $result .= sprintf $fmt, @rows;
}
$sth->finish;
return $result;