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Posted to issues@kylin.apache.org by "Fangyuan Deng (JIRA)" <ji...@apache.org> on 2018/12/19 03:59:00 UTC

[jira] [Updated] (KYLIN-3729) CLUSTER BY CAST(field AS STRING) will accelerate base cuboid build with UHC global dict

     [ https://issues.apache.org/jira/browse/KYLIN-3729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fangyuan Deng updated KYLIN-3729:
---------------------------------
    Description: 
As we know global dict is a sliced  appendTrieTree using cache-loader , so if we convert values to ids using global dict, ordered values will help.

And now we can set kylin.source.hive.flat-table-cluster-by-dict-column = uhc column, to make 

> CLUSTER BY CAST(field AS STRING) will accelerate base cuboid build with UHC global dict
> ---------------------------------------------------------------------------------------
>
>                 Key: KYLIN-3729
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3729
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Job Engine
>    Affects Versions: v2.5.2
>            Reporter: Fangyuan Deng
>            Assignee: Fangyuan Deng
>            Priority: Minor
>
> As we know global dict is a sliced  appendTrieTree using cache-loader , so if we convert values to ids using global dict, ordered values will help.
> And now we can set kylin.source.hive.flat-table-cluster-by-dict-column = uhc column, to make 



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