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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2018/01/18 10:19:00 UTC

[jira] [Commented] (KYLIN-3169) Should we simplify DataModelDesc to keep only Joins without defining dimensions & metrics

    [ https://issues.apache.org/jira/browse/KYLIN-3169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16330346#comment-16330346 ] 

Shaofeng SHI commented on KYLIN-3169:
-------------------------------------

Yes, it is necessary.

Cube is transparent for end user, so only data model can tell which columns are dimension and which are measures.

> Should we simplify DataModelDesc to keep only Joins without defining dimensions & metrics
> -----------------------------------------------------------------------------------------
>
>                 Key: KYLIN-3169
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3169
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Zhong Yanghong
>            Priority: Major
>
> One important thing kylin does is to materialize Joins between tables, which is the responsibility of {{DataModelDesc}}. However, is it necessary to prune or classify columns?



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