Update on numeric column using decimal values would set values to NULL

MariaDB [mytest]> create table t1 (snDECIMAL4_2 DECIMAL(4,2), unDECIMAL4_2 DECIMAL(4,2) unsigned) engine=columnstore;

Query OK, 0 rows affected (0.433 sec)

MariaDB [mytest]> desc t1;

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

| Field        | Type                  | Null | Key | Default | Extra |

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

| snDECIMAL4_2 | decimal(4,2)          | YES  |     | NULL    |       |

| unDECIMAL4_2 | decimal(4,2) unsigned | YES  |     | NULL    |       |

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

2 rows in set (0.001 sec)

MariaDB [mytest]> insert t1 values (10.55, 12.89);

Query OK, 1 row affected (0.295 sec)

MariaDB [mytest]> select * from t1;

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

| snDECIMAL4_2 | unDECIMAL4_2 |

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

|        10.55 |        12.89 |

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

1 row in set (0.094 sec)

MariaDB [mytest]> update t1 set snDECIMAL4_2 = 11.99, unDECIMAL4_2 = 17.99;

Query OK, 0 rows affected (0.322 sec)

Rows matched: 0  Changed: 0  Warnings: 0

MariaDB [mytest]> select * from t1;

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

| snDECIMAL4_2 | unDECIMAL4_2 |

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

|         NULL |         NULL |

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

1 row in set (0.010 sec)

MariaDB [mytest]> update t1 set snDECIMAL4_2 = 11, unDECIMAL4_2 = 17;

Query OK, 0 rows affected (0.162 sec)

Rows matched: 0  Changed: 0  Warnings: 0

MariaDB [mytest]> select * from t1;

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

| snDECIMAL4_2 | unDECIMAL4_2 |

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

|        11.00 |        17.00 |

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

1 row in set (0.042 sec)