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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2018/09/12 13:13:00 UTC

[jira] [Updated] (KYLIN-3489) Improve the efficiency of enumerating dictionary values

     [ https://issues.apache.org/jira/browse/KYLIN-3489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shaofeng SHI updated KYLIN-3489:
--------------------------------
    Summary: Improve the efficiency of enumerating dictionary values  (was: Improve the efficiency of enumerating dictionary values by pre-order visiting)

> Improve the efficiency of enumerating dictionary values
> -------------------------------------------------------
>
>                 Key: KYLIN-3489
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3489
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Metadata
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>            Priority: Major
>             Fix For: v2.5.0
>
>         Attachments: APACHE-KYLIN-3489.patch
>
>
> Currently, to enumerate all of the values of a dictionary, we enumerate the ids first and then get the related values. The compute complexity is nlogn. We can achieve the compute complexity of n by pre-order visiting the trie tree.



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