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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3946) No cube for AVG measure after include count column
Date Wed, 10 Apr 2019 09:34:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16814255#comment-16814255
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ASF GitHub Bot commented on KYLIN-3946:
---------------------------------------

Wayne1c commented on pull request #591: KYLIN-3946 Fix count column compatibility
URL: https://github.com/apache/kylin/pull/591
 
 
   
 
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> No cube for AVG measure after include count column
> --------------------------------------------------
>
>                 Key: KYLIN-3946
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3946
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine
>            Reporter: Chao Long
>            Assignee: Chao Long
>            Priority: Major
>             Fix For: v2.6.2
>
>
> Before, avg(col) will use sum(col)/count(1) to calculate.
> After including count column aggregation KYLIN-3883, avg(col) will use sum(col)/count(col)
to calculate. 
> If there is no predefined count(col) measure, query with avg(col) will get exception
"NoRealizationFoundException: No realization found for OLAPContext", which will effect the
query on old cubes. So we should consider compatibility.



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