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https://issues.apache.org/jira/browse/KYLIN-1557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Li closed KYLIN-1557.
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Resolved in release 1.5.1 (2016-04-13)
> Enhance the check on aggregation group dimension number
> -------------------------------------------------------
>
> Key: KYLIN-1557
> URL: https://issues.apache.org/jira/browse/KYLIN-1557
> Project: Kylin
> Issue Type: Improvement
> Components: Metadata
> Affects Versions: v1.5.0
> Reporter: Shaofeng SHI
> Assignee: Shaofeng SHI
> Fix For: v1.5.1
>
>
> If the dimension number in an aggregation group exceeds the number of
> "kylin.cube.aggrgroup.max.size" (default 12), Kylin will throw an error
> saying "Aggregation group <n> has too many dimensions"; User has to remove
> some dimensions to proceed.
> This check adds up the number of mandantory dimensions, hierarchy, joint and
> normal dimensions; This is too strong. The check should be optimized, all
> mandantory be treated as 1; all joint dimensions be treated as 2; each
> hierarchy be treated as N+1; nomal dimensions be 2^N; Control total
> combination numbers no more than a configured value
> ("kylin.cube.aggrgroup.max.combination", default 4096).
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