create table t1 (id int auto_increment primary key, v vector(5) not null, vector index (v)) engine=innodb;
insert t1 (v) values (Vec_Fromtext('[0.418,0.809,0.823,0.598,0.033]')),
(Vec_Fromtext('[0.687,0.789,0.496,0.574,0.917]')),
(Vec_Fromtext('[0.333,0.962,0.467,0.448,0.475]')),
(Vec_Fromtext('[0.822,0.185,0.683,0.211,0.554]')),
(Vec_Fromtext('[0.437,0.167,0.077,0.428,0.241]')),
(Vec_Fromtext('[0.769,0.926,0.803,0.015,0.589]')),
(Vec_Fromtext('[0.493,0.641,0.761,0.942,0.425]')),
(Vec_Fromtext('[0.924,0.275,0.054,0.073,0.136]')),
(Vec_Fromtext('[0.186,0.696,0.035,0.668,0.847]')),
(Vec_Fromtext('[0.415,0.609,0.426,0.988,0.475]'));
select id from t1 order by vec_distance_euclidean(v, Vec_FromText('[1,0,0,0,0]')) limit 3;
id
8
5
4
drop table t1;
db.opt
t1#i#01.ibd
t1.frm
t1.ibd
# shutdown server
# remove datadir
# xtrabackup move back
# restart
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `v` vector(5) NOT NULL,
  PRIMARY KEY (`id`),
  VECTOR KEY `v` (`v`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
select id, Vec_ToText(v) from t1;
id	Vec_ToText(v)
1	[0.418,0.809,0.823,0.598,0.033]
2	[0.687,0.789,0.496,0.574,0.917]
3	[0.333,0.962,0.467,0.448,0.475]
4	[0.822,0.185,0.683,0.211,0.554]
5	[0.437,0.167,0.077,0.428,0.241]
6	[0.769,0.926,0.803,0.015,0.589]
7	[0.493,0.641,0.761,0.942,0.425]
8	[0.924,0.275,0.054,0.073,0.136]
9	[0.186,0.696,0.035,0.668,0.847]
10	[0.415,0.609,0.426,0.988,0.475]
select id from t1 order by vec_distance_euclidean(v, Vec_FromText('[1,0,0,0,0]')) limit 3;
id
8
5
4
drop table t1;
#
# MDEV-35258 Mariabackup does not work with MyISAM tables with vector keys
#
create table t1 (a int, v vector(1) not null, vector(v)) engine=MyISAM;
insert into t1 values (1,0x31313131),(2,0x32323232);
drop table t1;
db.opt
t1#i#00.MYD
t1#i#00.MYI
t1.MYD
t1.MYI
t1.frm
# shutdown server
# remove datadir
# xtrabackup move back
# restart
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL,
  `v` vector(1) NOT NULL,
  VECTOR KEY `v` (`v`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
select * from t1 order by vec_distance_euclidean(v, 0x30303030) limit 1;
a	v
1	1111
drop table t1;