[jira] [Closed] (KYLIN-3429) Have a default measure value to save storage space

["Shao Feng Shi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KYLIN-3429?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shao Feng Shi closed KYLIN-3429.
--------------------------------
    Resolution: Won't Fix

> Have a default measure value to save storage space
> --------------------------------------------------
>
>                 Key: KYLIN-3429
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3429
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: liyang
>            Priority: Major
>
> The idea is from Alberto.
> When a Cuboid is very sparse, like below:
>  
> ||Dim1||Dim2||Measure||
> |1|A|0|
> |1|B|100|
> |1|C|0|
> |2|A|0|
> |2|B|0|
> |2|C|130|
> It becomes beneficial to store only the non-zero lines and remember a default measure value for the rest.
> That is to only save the below lines, plus the default value 0.
> ||Dim1||Dim2||Measure||
> |1|B|100|
> |2|C|130|
> However this comes with the assumption that all combinations of dimensions exist in cuboid.
>  
>  



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