my $schema = Timetable::Schema->connect("dbi:Oracle:$schema_name",
                        $db_username, $db_password,
                        {on_connect_call => 'datetime_setup'}
                );

my $resultset = $schema->resultset('Ical')
                       ->search($id);
print "Start time is ", $resultset->start_time;
# Start time is 2018-04-30T16:00:00