ALTER TABLE re-creating vector key is no-op with non-copying alter algorithms (default)

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

insert into t values (0x31313131); # Optional, fails either way

alter table t drop index v, add vector(v) distance=cosine;

show create table t;

# Cleanup

drop table t;

alter table t drop index v, add vector(v) distance=cosine;

show create table t;

Table	Create Table

t	CREATE TABLE `t` (

  `v` vector(1) NOT NULL,

  VECTOR KEY `v` (`v`) `distance`=euclidean

) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci