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Posted to issues@kylin.apache.org by "Zhong Yanghong (JIRA)" <ji...@apache.org> on 2018/12/24 08:54:00 UTC

[jira] [Commented] (KYLIN-3411) kylin scan different in same sql

    [ https://issues.apache.org/jira/browse/KYLIN-3411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16728260#comment-16728260 ] 

Zhong Yanghong commented on KYLIN-3411:
---------------------------------------

Good catch.

> kylin scan different in same sql
> --------------------------------
>
>                 Key: KYLIN-3411
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3411
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: v2.3.1
>            Reporter: Lemont
>            Priority: Minor
>             Fix For: v2.6.0
>
>
> There are two sql:
> select sum(value) from test where time > 1524326400 group by id
> and
> select sum(value) from test where time > (1524931200-7*86400) group by id
> As we can see 1524326400 =(1524931200-7*86400) 
> but the second sql query slower than the first sql
> Cuboid Ids: [3904]
> Total scan count: 1157959
> Total scan bytes: 265530668
> Result row count: 34991
> Cuboid Ids: [3904]
> Total scan count: 611795
> Total scan bytes: 140681855
> Result row count: 34991



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