reverse function not work properly with non-latin chars

 drop table  IF EXISTS rev;

 create table IF NOT EXISTS  rev (c1 varchar(8), c2 char(8), c3 varchar(32)) ENGINE=ColumnStore  DEFAULT CHARSET=UTF8 ;

INSERT INTO rev (c1,c2,c3) VALUES('カキクケコ','カキクケコ','カキクケコ');

INSERT INTO rev (c1,c2,c3) VALUES('ABCD','ABCD','ABCD');

INSERT INTO rev (c1,c2,c3) VALUES('４５６７８','４５６７８','４５６７８');

INSERT INTO rev (c1,c2,c3) VALUES('45678','45678','45678');

select c1,reverse(c1),reverse(c2),reverse(c3) from rev;

MariaDB [rtest]> select c1,reverse(c1),reverse(c2),reverse(c3) from rev;

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

| c1       | reverse(c1) | reverse(c2) | reverse(c3)     |

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

| カキ??   | ?㭂㫂?      | ?㭂㫂?      | ??㱂㯂㭂㫂?     |

| ABCD     | DCBA        | DCBA        | DCBA            |

| ４５??   | ??        | ??        | ???         |

| 45678    | 87654       | 87654       | 87654           |

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

MariaDB [rtest]> select c1,reverse(c1),reverse(c2),reverse(c3) from rev;

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

| c1              | reverse(c1)     | reverse(c2)     | reverse(c3)     |

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

| カキクケコ      | コケクキカ      | コケクキカ      | コケクキカ      |

| ABCD            | DCBA            | DCBA            | DCBA            |

| ４５６７８      | ８７６５４      | ８７６５４      | ８７６５４      |

| 45678           | 87654           | 87654           | 87654           |

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