INDEX_STATISTICS does not show the use of a vector key

set @userstat.save= @@userstat;

set global userstat=1;

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

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

explain select * from t order by vec_distance_euclidean(b,0x30303030) limit 1;

select * from t order by vec_distance_euclidean(b,0x30303030) limit 1;

show index_statistics;

# Cleanup

drop table t;

set global userstat= @userstat.save;

explain select * from t order by vec_distance_euclidean(b,0x30303030) limit 1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t	index	NULL	b	6	NULL	1	

select * from t order by vec_distance_euclidean(b,0x30303030) limit 1;

b

1111

show index_statistics;

Table_schema	Table_name	Index_name	Rows_read	Queries

drop table t;