SELECT vec_to_string(parse_vec('[1.0, 2.0]'));

+----------------------------------------------+
| vec_to_string(parse_vec(Utf8("[1.0, 2.0]"))) |
+----------------------------------------------+
| [1,2]                                        |
+----------------------------------------------+

SELECT vec_to_string(parse_vec('[1.0, 2.0, 3.0]'));

+---------------------------------------------------+
| vec_to_string(parse_vec(Utf8("[1.0, 2.0, 3.0]"))) |
+---------------------------------------------------+
| [1,2,3]                                           |
+---------------------------------------------------+

SELECT vec_to_string(parse_vec('[]'));

+--------------------------------------+
| vec_to_string(parse_vec(Utf8("[]"))) |
+--------------------------------------+
| []                                   |
+--------------------------------------+