const struct ovsdb_type *);
struct ovsdb_column *ovsdb_column_clone(const struct ovsdb_column *);
void ovsdb_column_destroy(struct ovsdb_column *);
const struct ovsdb_type *);
struct ovsdb_column *ovsdb_column_clone(const struct ovsdb_column *);
void ovsdb_column_destroy(struct ovsdb_column *);