UpdateXML should retuln xmltype

MariaDB [test]> create table c as select UpdateXML('<a><b>ccc</b><d></d></a>', '/a', '<e>fff</e>');

Query OK, 1 row affected (0,057 sec)

Records: 1  Duplicates: 0  Warnings: 0

MariaDB [test]> show create table c;

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

| Table | Create Table                                                                                                                                                                 |

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

| c     | CREATE TABLE `c` (

  `UpdateXML('<a><b>ccc</b><d></d></a>', '/a', '<e>fff</e>')` longtext DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci |

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

1 row in set (0,001 sec)