bug: ERROR: operator is not unique: unknown <-> unknown

[BeautyyuYanli]

❯ psql -h localhost -U postgres
Password for user postgres: 
psql (15.4)
Type "help" for help.

postgres=# SELECT '[1, 2, 3]' <-> '[3, 2, 1]';
ERROR:  operator is not unique: unknown <-> unknown
LINE 1: SELECT '[1, 2, 3]' <-> '[3, 2, 1]';
                           ^
HINT:  Could not choose a best candidate operator. You might need to add explicit type casts.

[silver-ymz]

The default type of '' is unknown in SQL. Seems you need to add explicit type casts, e.x. SELECT '[1,2,3]'::vector <-> '[1,2,3]'::vector;

[BeautyyuYanli]

<#> and <=> is ok

Need to update readme