Hive 为什么此配置单元QL应按“ds”分组？

ds=yyyyMMdd，日期\时间为yyyymmds分区100和楼层

我只是按字段1date_time分组，但为什么编译器说它应该按“ds”分组呢

编辑：

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ds是分区的字段。

可以对原始列数据进行配置单元分组

select 
(floor(cast(ds as bigint)/100)) as date_time,
count(DISTINCT trans_id) as n_trans
from xxx
where ds >= "20140301" and adzone_id = '10263209'
group by 1;

Begin execute SQL: select 
(floor(cast(ds as bigint)/100)) as date_time,
count(DISTINCT trans_id) as n_trans
from xxx
where ds >= "20140301" and adzone_id = '10263209'
group by 1
Hive history file=/xxx.txt
FAILED: Error in semantic analysis: Line 0:-1 Expression not in GROUP BY key 'ds'
over