kylin-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lemont (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (KYLIN-3402) kylin not support count distinct in sub
Date Fri, 15 Jun 2018 10:01:01 GMT

     [ https://issues.apache.org/jira/browse/KYLIN-3402?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lemont closed KYLIN-3402.
-------------------------
    Resolution: Fixed

> kylin not support count distinct in sub
> ---------------------------------------
>
>                 Key: KYLIN-3402
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3402
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Lemont
>            Priority: Major
>
> why kylin not support count  distinct in innermost sub-query.To deal with it I have
to try another way to write sql,it's very complicated.
> For example id is the Dimensions:
> select count( DISTINCT case when condition = 1 then id end) idCount
>  from (
>  select condition,id
>  from table
> where xxx
> group by xxx
>  )
> To support count distinct I hava to rewrite it to:
> select count(1) from (
> select  case when condition = 1 then id end idCount
> from (
> select condition,id
> from table 
> where xxx
> group by xxx
> ) group by idCount
> )
> I feel so bad with it ,Is there a better solution?
>  Thanks to every answer
>  
>  



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message