sql_mode=oracle: errors "Undefined CURSOR" AND "check ... right syntax to use near '%"

set sql_mode=oracle;

MariaDB [test]> SELECT 5%5 from dual;

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 '%5 from dual' at line 1

MariaDB [test]> wait_timeout:=102411111%1023;

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 '%1023' at line 1

MariaDB [test]> select 1 from seq_1_to_2 where seq % 5;

ERROR 1324 (42000): Undefined CURSOR: seq

MariaDB [test]> select 1 from seq_1_to_2 where seq % 5;

+---+

| 1 |

+---+

| 1 |

| 1 |

+---+

2 rows in set (0.00 sec)

MariaDB [test]> SELECT 5%5;

+------+

| 5%5  |

+------+

|    0 |

+------+

1 row in set (0.00 sec)