--innodb-instant-alter-column-allowed

This is a command-line option for the mariadbd & mysqld commands (arg: Required).

In 10.6 CS, 10.5 ES, 10.5 CS, 10.4 ES, 10.4 CS:

File format constraint for ALTER TABLE. One of: never, add_last, add_drop_reorder

In 10.3 ES, 10.3 CS:

File format constraint for ALTER TABLE. One of: never, add_last

In 10.2 ES, 10.2 CS:

Not present

See also: mariadbd & mysqld for MariaDB Community Server 10.6, in 10.5 ES, in 10.5 CS, in 10.4 ES, in 10.4 CS, in 10.3 ES, in 10.3 CS, in 10.2 ES, and in 10.2 CS