mysql> alter table candidate_candidate add column responsible_user_id int, algorithm=INPLACE, lock=NONE;
ERROR 1845 (0A000): ALGORITHM=INPLACE is not supported for this operation.
Try ALGORITHM=COPY.

alter table candidate_candidate add column responsible_user_id int, algorithm=INPLACE, lock=NONE;
Query OK, 0 rows affected (0.48 sec)
Records: 0  Duplicates: 0  Warnings: 0