$::form->get_standard_dbh liefert ein Handle, das AutoCommits aus hat
$::form->und daher eh immer explizit in einer Transaktion
$::form->steckt. Vermeidet zusätzlich eine Warnung.
# connect to database, turn off autocommit
my $dbh = $form->get_standard_dbh;
# connect to database, turn off autocommit
my $dbh = $form->get_standard_dbh;
my (%payments, $old_form, $row, $item, $query, %keep_vars);
my (%payments, $old_form, $row, $item, $query, %keep_vars);
# connect to database
my $dbh = $form->get_standard_dbh;
# connect to database
my $dbh = $form->get_standard_dbh;
&reverse_invoice($dbh, $form);
&reverse_invoice($dbh, $form);