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https://issues.apache.org/jira/browse/KYLIN-4281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17051905#comment-17051905
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ASF GitHub Bot commented on KYLIN-4281:
---------------------------------------

kyotoYaho commented on pull request #1144: KYLIN-4281 Precisely set the data 
type of tuple expression
URL: https://github.com/apache/kylin/pull/1144
 
 
   
 
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> Precisely set the data type of tuple expression
> -----------------------------------------------
>
>                 Key: KYLIN-4281
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4281
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>            Priority: Major
>
> Previously to simplify the calculating of sum(case when), all of the binary 
> calculation is based on BigDecimal, which is not good for all, especially 
> when dealing with count(distinct case when), whose inner data type may be hll 
> or bitmap.



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