for (i = 0; i < aux->mt->columns.n_columns; i++) {
const struct ovsdb_column *column = aux->mt->columns.columns[i];
unsigned int idx = column->index;
for (i = 0; i < aux->mt->columns.n_columns; i++) {
const struct ovsdb_column *column = aux->mt->columns.columns[i];
unsigned int idx = column->index;