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Posted to notifications@iotdb.apache.org by "liaolanyu (Jira)" <ji...@apache.org> on 2022/07/26 02:57:00 UTC

[jira] [Commented] (IOTDB-3626) Wrong row cnt in IoTDBUDTFAlignByTimeQueryIT

    [ https://issues.apache.org/jira/browse/IOTDB-3626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17571179#comment-17571179 ] 

liaolanyu commented on IOTDB-3626:
----------------------------------

s1: (1,1) (2,2)......(10,10)
select max(s1) from root.sg where s1 >= 3 and s1 <7
正确值：(6,6)

之前的做法：对1-10这十个点都进行了max的比对，导致max的结果是10，时间戳是10，然后在filter过滤的时候，其实只有3-6这几个时间戳是要保留的，所以max的结果就不对了



现在的做法：先过滤再进行计算，规避了这种问题。

> Wrong row cnt in IoTDBUDTFAlignByTimeQueryIT
> --------------------------------------------
>
>                 Key: IOTDB-3626
>                 URL: https://issues.apache.org/jira/browse/IOTDB-3626
>             Project: Apache IoTDB
>          Issue Type: Improvement
>            Reporter: liaolanyu
>            Assignee: liaolanyu
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: cluster-logs.zip
>
>
> queryWithValueFilter9 and queryWithValueFilter10 will fail.



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