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https://issues.apache.org/jira/browse/KYLIN-2497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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XIE FAN updated KYLIN-2497:
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Description: 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.
> Optimize the performance of SelfDefineSortableKey
> --------------------------------------------------
>
> Key: KYLIN-2497
> URL: https://issues.apache.org/jira/browse/KYLIN-2497
> Project: Kylin
> Issue Type: Improvement
> Reporter: XIE FAN
> Assignee: XIE FAN
> 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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