[jira] [Commented] (KYLIN-2363) support limit of dimensions in a cuboid

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

    [ https://issues.apache.org/jira/browse/KYLIN-2363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15877339#comment-15877339 ] 

Copperfield commented on KYLIN-2363:
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And maybe if we calculate from top? 
In my opinion, kylin build all cuboids from 6 dimensions to 1dimension, ABCDEF -> A/B/C/D/E/F.
we can only build to 4 or 3 dimensions, ABCD/ABCE..,
the when query, we can use these existing results to calculate the result we want. It may be quicker than tail to top?

> support limit of dimensions in a cuboid
> ---------------------------------------
>
>                 Key: KYLIN-2363
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2363
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: fengYu
>
> the scene like this:
> I have 20+ dimensions, However the query will only use at most 5 dimensions in all dimensions, so cuboid that contains 5+ dimensions(except base cuboid) is useless.
> I think we can add a configuration in cube, which limit the max dimensions that cuboid includes.
> What's more, we can config which level(number of dimension) need to calculate. in above scene, we only calculate leve 1,2,3,4,5. and skip level 5+



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