Parameterized UPDATE/DELETE/Stored routines against ENGINE=DuckDB fails

INSTALL SONAME 'ha_duckdb';

CREATE OR REPLACE TABLE t1 (id INT PRIMARY KEY, val INT) ENGINE=DuckDB;

INSERT INTO t1 VALUES (1,10),(2,20),(3,30);

SET @v = 99;

UPDATE t1 SET val=@v WHERE id=1;

SET @k = 2;

DELETE FROM t1 WHERE id=@k;

SELECT * FROM t1 WHERE id=@k;

PREPARE s FROM 'UPDATE t1 SET val=? WHERE id=?';

SET @a = 100, @b = 3;

EXECUTE s USING @a, @b;

13.1.0-opt>INSTALL SONAME 'ha_duckdb';

Query OK, 0 rows affected (0.086 sec)

13.1.0-opt>CREATE OR REPLACE TABLE t1 (id INT PRIMARY KEY, val INT) ENGINE=DuckDB;

Query OK, 0 rows affected (0.014 sec)

13.1.0-opt>INSERT INTO t1 VALUES (1,10),(2,20),(3,30);

Query OK, 3 rows affected (0.020 sec)

Records: 3  Duplicates: 0  Warnings: 0

13.1.0-opt>

13.1.0-opt>SET @v = 99;

Query OK, 0 rows affected (0.000 sec)

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

ERROR 1296 (HY000): Got error 168 'Parser Error: syntax error at or near "=@"

LINE 1: UPDATE t1 SET val=@v WHERE id=1

                         ^' from DuckDB

13.1.0-opt>SET @k = 2;

Query OK, 0 rows affected (0.000 sec)

13.1.0-opt>DELETE FROM t1 WHERE id=@k;

ERROR 1296 (HY000): Got error 168 'Catalog Error: Scalar Function with name =@ does not exist!

Did you mean "<@"?

LINE 1: DELETE FROM t1 WHERE id=@k

                               ^' from DuckDB

13.1.0-opt>SELECT * FROM t1 WHERE id=@k;

ERROR 1031 (HY000): Storage engine DUCKDB of the table `test`.`t1` doesn't have this option

13.1.0-opt>

13.1.0-opt>PREPARE s FROM 'UPDATE t1 SET val=? WHERE id=?';

Query OK, 0 rows affected (0.000 sec)

Statement prepared

13.1.0-opt>SET @a = 100, @b = 3;

Query OK, 0 rows affected (0.000 sec)

13.1.0-opt>EXECUTE s USING @a, @b;

ERROR 1296 (HY000): Got error 168 'Invalid Input Error: Expected 2 parameters, but none were supplied' from DuckDB

13.1.0-opt>