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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2017/04/25 11:13:04 UTC

[jira] [Updated] (KYLIN-2497) Optimize the performance of SelfDefineSortableKey

     [ https://issues.apache.org/jira/browse/KYLIN-2497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shaofeng SHI updated KYLIN-2497:
--------------------------------
       Affects Version/s: v2.0.0
    Request participants:   (was: )
           Fix Version/s: v2.0.0

> Optimize the performance of SelfDefineSortableKey 
> --------------------------------------------------
>
>                 Key: KYLIN-2497
>                 URL: https://issues.apache.org/jira/browse/KYLIN-2497
>             Project: Kylin
>          Issue Type: Improvement
>    Affects Versions: v2.0.0
>            Reporter: XIE FAN
>            Assignee: XIE FAN
>             Fix For: v2.0.0
>
>         Attachments: 0001-KYLIN-2497-Optimize-the-performance-of-SelfDefineSor.patch
>
>
> In KYLIN-1851, we introduce a new sorting key "SelfDefineSortableKey" in kylin because the new dictionary needs ordered input value. But recently we found that when users apply dictionary encoding to a double type column, the sorting procedure of SelfDefineSortableKey is very slow. So some optimization need to be made to fix that.



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