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https://issues.apache.org/jira/browse/KYLIN-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shaofeng SHI updated KYLIN-3359:
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Attachment: KYLIN-3359-Kylin-query.png
> Support sum(expression) if possible
> -----------------------------------
>
> Key: KYLIN-3359
> URL: https://issues.apache.org/jira/browse/KYLIN-3359
> Project: Kylin
> Issue Type: Sub-task
> Reporter: Zhong Yanghong
> Assignee: Zhong Yanghong
> Priority: Major
> 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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