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

insert into t values (0x31313131),(0x32323232);

create function f(x vector(1)) returns float return vec_distance(x,0x30303030);

select f(v) from t;

drop function f;

drop table t;

mysqltest: At line 4: query 'select f(v) from t' failed: ER_VEC_DISTANCE_TYPE (4206): Cannot determine distance type for VEC_DISTANCE, index is not found

Warnings from just before the error:

Error 4206 Cannot determine distance type for VEC_DISTANCE, index is not found