Re: [jira] [Created] (IOTDB-335) Separate query execution of the same timeseries with different aggregate functions

[Jialin Qiao]

Hi,

This is a good optimization :)

Thanks,
Jialin Qiao

Lei Rui (Jira) <j...@apache.org> 于2019年12月3日周二 下午2:20写道：

> Lei Rui created IOTDB-335:
> -----------------------------
>
>              Summary: Separate query execution of the same timeseries with
> different aggregate functions
>                  Key: IOTDB-335
>                  URL: https://issues.apache.org/jira/browse/IOTDB-335
>              Project: Apache IoTDB
>           Issue Type: Improvement
>             Reporter: Lei Rui
>
>
> For example,
>
> select avg(s1),sum(s1) from root.sg.d0
>
> select first_value(s1),first_time(s1) from root.sg.d0
>
> select count(s1), sum(s1) from root.sg.d0 group by ([1,100],2ms)
>
>
>
> Probably the results of the same timeseries with different aggregate
> functions can be achieved in one query execution process.
>
>
>
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-- 
—————————————————
Jialin Qiao
School of Software, Tsinghua University

乔嘉林
清华大学 软件学院