Hi all, I'm trying to create a deferrable foreign key constraint, according to the knowledge base article at https://kb.askmonty.org/en/constraint_type-foreign-key-constraint/. The syntax of "deferrable initially deferred" doesn't seem to be recognised. Without it, the tables are created just fine. I'm using MariaDB 5.5.31. Example: create table one ( id int primary key ); create table two ( id int primary key, one_ref int, constraint fk foreign key(one_ref) references one(id) deferrable initially deferred ); => error: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'deferrable initially deferred )' at line 4 Any idea what's wrong? Is this only supported in MariaDB 10.x? Thanks! Best regards Joeri Leemans