while (my $row = $sth->fetchrow_hashref ) {
$row->{borrowernumber} = lookup($k, 'borrowers', 'cardnumber' => 'borrowernumber', $row->{borrowernumber});
$row->{itemnumber} = lookup($k, 'items', 'barcode' => 'itemnumber', $row->{itemnumber});
while (my $row = $sth->fetchrow_hashref ) {
$row->{borrowernumber} = lookup($k, 'borrowers', 'cardnumber' => 'borrowernumber', $row->{borrowernumber});
$row->{itemnumber} = lookup($k, 'items', 'barcode' => 'itemnumber', $row->{itemnumber});