如果我使用带有 INTERVAL 关键字的封闭单位值集，MySQL 将返回什么？

以下示例将阐明这一点 -

mysql> Select TIMESTAMP('2017-10-22 04:05:36' + INTERVAL '4 2' Hour)AS 'HOUR VALUE INCREASED BY 4';
+---------------------------+
| HOUR VALUE INCREASED BY 4 |
+---------------------------+
| 2017-10-22 08:05:36       |
+---------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> Show warnings;
+---------+------+------------------------------------------+
| Level   | Code | Message                                  |
+---------+------+------------------------------------------+
| Warning | 1292 | Truncated incorrect INTEGER value: '4 2' |
+---------+------+------------------------------------------+
1 row in set (0.00 sec)

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