PL/SQL parser does not understand historical queries

MariaDB [test]> SET sql_mode=ORACLE;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> SELECT * FROM t FOR SYSTEM_TIME ALL;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SYSTEM_TIME ALL' at line 1