JSON_TABLE: SELECT from json_table does not work without default database

MariaDB [(none)]> select * from json_table('{"a":0}',"$" columns(a for ordinality)) foo;

ERROR 1046 (3D000): No database selected

MySQL [(none)]> select * from json_table('{"a":0}',"$" columns(a for ordinality)) foo;

+------+

| a    |

+------+

|    1 |

+------+

1 row in set (0.001 sec)