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https://issues.apache.org/jira/browse/KYLIN-3392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16927599#comment-16927599
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ASF subversion and git services commented on KYLIN-3392:
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Commit 1a2f779a074c1d03703eebbb7506d171ef26ce56 in kylin's branch
refs/heads/master from Yifei Wu
[ https://gitbox.apache.org/repos/asf?p=kylin.git;h=1a2f779 ]
Kylin 3392 support sum(null)
* KYLIN-3392 support sum(null)
* KYLIN-3392 support sum(null)
* Minor, code review
> Support NULL value in Sum, Max, Min Aggregation
> -----------------------------------------------
>
> Key: KYLIN-3392
> URL: https://issues.apache.org/jira/browse/KYLIN-3392
> Project: Kylin
> Issue Type: Bug
> Reporter: Yifei Wu
> Assignee: Yifei Wu
> Priority: Major
> Fix For: v3.0.0, v2.6.4
>
>
> It is treated as 0 when confronted with NULL value in KYLIN's basic aggregate
> measure (like sum, max, min). However, to distinguish the NULL value with 0
> is very necessary.
> It should be like this
> *sum(null, null) = null*
> *sum(null, 1) = 1*
> *max(null, null) = null*
> *max(null, -1) = -1*
> *min(null, -1）= -1*
> in accordance with Hive and SparkSQL
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