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Posted to issues@kylin.apache.org by "liyang (JIRA)" <ji...@apache.org> on 2017/04/22 06:22:04 UTC

[jira] [Resolved] (KYLIN-2552) Fix backward compatibility

     [ https://issues.apache.org/jira/browse/KYLIN-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

liyang resolved KYLIN-2552.
---------------------------
    Resolution: Fixed

This is fixed.

> Fix  backward compatibility
> ---------------------------
>
>                 Key: KYLIN-2552
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2552
>             Project: Kylin
>          Issue Type: Sub-task
>            Reporter: XIE FAN
>            Assignee: XIE FAN
>             Fix For: v2.0.0
>
>
> In KYLIN-2518, we modify the hash algorithm in the putRowKeyToHLL method in FactDistinictColumnsMapper. This optimization may cause backward compatibility problems because different kylin version may use different hash algorithm and this will cause inaccurate estimation of the number of cuboids. 



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