You can use ALTER TABLE … MODIFY. SingleStoreDB Cloud · SingleStore Documentation.
E.g.
memsql> create table t(a int, b int, c int);
Query OK, 0 rows affected (0.07 sec)
memsql> insert t values(1,2,3);
Query OK, 1 row affected (0.04 sec)
memsql> select * from t;
+------+------+------+
| a | b | c |
+------+------+------+
| 1 | 2 | 3 |
+------+------+------+
1 row in set (0.07 sec)
memsql> alter table t modify c int after a;
Query OK, 1 row affected (0.76 sec)
Records: 1 Duplicates: 0 Warnings: 0
memsql> select * from t;
+------+------+------+
| a | c | b |
+------+------+------+
| 1 | 3 | 2 |
+------+------+------+
Don’t try to directly update information_schema. That’s not recommended and I’m not sure it’s possible.