mysql> select create_time from test order by create_time limit 10;
+----------------------------+
| create_time |
+----------------------------+
| 2014-05-22 16:19:49 |
| 2014-05-28 20:44:58 |
| 2015-12-04 15:48:03 |
| 2014-05-28 11:18:49.91675 |
| 2014-05-26 18:27:22.434839 |
| 2014-05-26 18:40:48.106799 |
| 2014-05-26 18:49:25.626657 |
| 2014-05-26 18:53:31.944941 |
| 2014-05-26 19:04:00.222669 |
| 2014-05-26 21:10:37.869413 |
+----------------------------+
10 rows in set (0.02 sec)

从两个分片中取出数据，其中 2015-12-04 15:48:03 是native方式的mysql， 其他的是jdbc的postgresql