MySQL에서 시간 부분을 구분하는 데 사용할 수 있는 구두점은 무엇입니까?

mysql> Select timestamp('2017-10-20 04+05+36');
+----------------------------------+
| timestamp('2017-10-20 04+05+36') |
+----------------------------------+
| 2017-10-20 04:05:36              |
+----------------------------------+
1 row in set (0.00 sec)


mysql> Select timestamp('2017-10-20 04*05*36');
+----------------------------------+
| timestamp('2017-10-20 04*05*36') |
+----------------------------------+
| 2017-10-20 04:05:36              |
+----------------------------------+
1 row in set (0.00 sec)


mysql> Select timestamp('2017-10&20 04@05+36');
+----------------------------------+
| timestamp('2017-10&20 04@05+36') |
+----------------------------------+
| 2017-10-20 04:05:36              |
+----------------------------------+
1 row in set (0.00 sec)


mysql> Select timestamp('2017*10@20 04*05*36');
+----------------------------------+
| timestamp('2017*10@20 04*05*36') |
+----------------------------------+
| 2017-10-20 04:05:36              |
+----------------------------------+
1 row in set (0.00 sec)