TIMESTAMP ... ON UPDATE CURRENT_TIMESTAMP does not auto-update on ENGINE=DuckDB

INSTALL SONAME 'ha_duckdb';

CREATE TABLE t1 (id INT PRIMARY KEY, v INT, ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) ENGINE=DuckDB;

INSERT INTO t1 VALUES (1, 100, '2020-01-01 00:00:00');

SELECT SLEEP(2);

UPDATE t1 SET v=200 WHERE id=1;

SELECT * FROM t1;

13.1.0-opt>INSTALL SONAME 'ha_duckdb';

Query OK, 0 rows affected (1.181 sec)

13.1.0-opt>CREATE TABLE t1 (id INT PRIMARY KEY, v INT, ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) ENGINE=DuckDB;

Query OK, 0 rows affected (0.033 sec)

13.1.0-opt>INSERT INTO t1 VALUES (1, 100, '2020-01-01 00:00:00');

Query OK, 1 row affected (0.071 sec)

13.1.0-opt>SELECT SLEEP(2);

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

| SLEEP(2) |

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

|        0 |

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

1 row in set (2.000 sec)

13.1.0-opt>UPDATE t1 SET v=200 WHERE id=1;

Query OK, 1 row affected (0.073 sec)

Rows matched: 1  Changed: 1  Warnings: 0

13.1.0-opt>SELECT * FROM t1;

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

| id | v    | ts                  |

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

|  1 |  200 | 2020-01-01 00:00:00 |

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

1 row in set (0.014 sec)

13.1.0-opt>SHOW CREATE TABLE t1\G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `id` int(11) NOT NULL,

  `v` int(11) DEFAULT NULL,

  `ts` timestamp NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),

  PRIMARY KEY (`id`)

) ENGINE=DUCKDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci

1 row in set (0.003 sec)

13.1.0-opt>