Virtual POINT column empty value

Virtual POINT column empty value

CREATE OR REPLACE TABLE t1 (a VARBINARY(128) NOT NULL, b POINT AS (a));

INSERT INTO t1 (a) VALUES ('test');

SELECT * FROM t1;

+------+------+

| a    | b    |

+------+------+

| test |      |

+------+------+

1 row in set, 1 warning (0.000 sec)

The value 'test' is obviously a wrong binary POINT value. The column 'b' return an empty string as a result, which is a wrong POINT value.

It should probably mark the column 'b' as nullable and return NULL.