bitmap_set1(txn_row->changed, column->index);
ovsdb_datum_sort_assert(datum, column->type.key.type);
if (datum->n < column->type.n_min) {
bitmap_set1(txn_row->changed, column->index);
ovsdb_datum_sort_assert(datum, column->type.key.type);
if (datum->n < column->type.n_min) {