create table t (v vector(1) not null, vector(v), d float);

create trigger tr before insert on t for each row set new.d = vec_distance(new.v,0x30303030);

insert into t (v) values (0x31313131);

drop table t;

mysqltest: At line 3: query 'insert into t (v) values (0x31313131)' failed: ER_VEC_DISTANCE_TYPE (4206): Cannot determine distance type for VEC_DISTANCE, index is not found