[jira] [Updated] (KYLIN-3359) Support sum(expression) if possible

["Shaofeng SHI (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KYLIN-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shaofeng SHI updated KYLIN-3359:
--------------------------------
    Fix Version/s: v2.4.0
      Component/s: Query Engine

> Support sum(expression) if possible
> -----------------------------------
>
>                 Key: KYLIN-3359
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3359
>             Project: Kylin
>          Issue Type: Sub-task
>          Components: Query Engine
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>            Priority: Major
>             Fix For: v2.4.0
>
>         Attachments: KYLIN-3359-Hive-query.png, KYLIN-3359-Kylin-query.png
>
>
> The expression can be as follows:
>  # a ~1~*col ~1~ + a ~2~*col ~2~ + ... + a ~n~*col ~n~ + b, if sum(col ~1~),sum(col ~2~),...sum(col ~n~) are defined
>  # case when {{filter}} ~1~ then expr ~1~
>  when {{filter}} ~2~ then expr ~2~
>  ...
>  else expr ~N~
>  end, if {{filter}} ~1~,{{filter}} ~2~, ... {{filter}} ~N-1~, and expr ~1~,expr ~2~,...expr ~N~ are supported 
> There's a constraint for the filter. That is it's able to push down the related filters in case when.



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