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https://issues.apache.org/jira/browse/KYLIN-3206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16342568#comment-16342568
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Shaofeng SHI commented on KYLIN-3206:
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Hi Paul, would you like to contribute a patch to Kylin? Thanks!
> Consider SQL expression aggregation when applying limit push down
> -----------------------------------------------------------------
>
> Key: KYLIN-3206
> URL: https://issues.apache.org/jira/browse/KYLIN-3206
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v1.6.0, v2.2.0
> Environment: Kylin 1.6.0
> Reporter: Paul Lin
> Assignee: liyang
> Priority: Major
>
> SQLs like "select floor(user_level /10), sum(money) group by floor(user_level
> /10) limit 10" should not trigger storage limit push down, because the
> expressions like "floor(user_level /10)" are sort of post aggregations.
> Otherwise Kylin would do aggregations based on partial records, producing
> inaccurate results.
>
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