Dynamic columns can be stored in ColumnStore table, but cannot be extracted

drop table if exists t2;

create table t2 (b blob) engine=Columnstore;

insert into t2 values (column_create('foo','bar'));

select column_json(b) from t2;

MariaDB [db]> insert into t2 values (column_create('foo','bar'));

Query OK, 1 row affected (0.148 sec)

MariaDB [db]> select column_json(b) from t2;

ERROR 1178 (42000): The storage engine for the table doesn't support IDB-1001: Function 'column_json' can only be used in the outermost select or order by clause and cannot be used in conjunction with an aggregate function.