Hive - 手动将日期从UTC转换为CSRT

Question

oracle数据库存储日期偏移列，用于将UTC日期转换为CST。然后当你选择SELECT时你会这样做：

    select ConnectedDatetimeUTC,
CAST(connecteddatetimeutc + (startdtoffset/ (24 * 60 * 60)) as timestamp(3)) as connecteddattimeManual2
from table1

我们正在努力在HIVE SQL中实现这一点。

Answer 1

with    table1 as 
        (
            select  timestamp '2017-02-28 23:58:41' as connecteddatetimeutc
                   ,1234                            as startdtoffset
        )

select  ConnectedDatetimeUTC
       ,startdtoffset
       ,from_unixtime (unix_timestamp(connecteddatetimeutc) + startdtoffset) as connecteddattimeManual2

from    table1
;

+----------------------+---------------+-------------------------+
| connecteddatetimeutc | startdtoffset | connecteddattimemanual2 |
+----------------------+---------------+-------------------------+
| 2017-02-28 23:58:41  |          1234 | 2017-03-01 00:19:15     |
+----------------------+---------------+-------------------------+