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Posted to dev@iotdb.apache.org by "Jialin Qiao (Jira)" <ji...@apache.org> on 2020/02/06 12:02:00 UTC

[jira] [Closed] (IOTDB-452) Do all aggregations of one series at one pass in GroupBy

     [ https://issues.apache.org/jira/browse/IOTDB-452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jialin Qiao closed IOTDB-452.
-----------------------------
    Fix Version/s: 0.10.0-SNAPSHOT
       Resolution: Fixed

> Do all aggregations of one series at one pass in GroupBy
> --------------------------------------------------------
>
>                 Key: IOTDB-452
>                 URL: https://issues.apache.org/jira/browse/IOTDB-452
>             Project: Apache IoTDB
>          Issue Type: Improvement
>            Reporter: Jialin Qiao
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 0.10.0-SNAPSHOT
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> For example
>  
> select avg(s1), count(s1), first(s1) from root.sg.d1 group by ([100,199],10ms)
>  
> We could just construct one aggregate reader and get three aggregation results at one pass.



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