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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3161) Enforce global dictionary for bitmap count distinct column
Date Mon, 04 Jun 2018 01:16:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16499637#comment-16499637
] 

ASF GitHub Bot commented on KYLIN-3161:
---------------------------------------

shaofengshi commented on issue #147: KYLIN-3161 Enforce global dictionary for bitmap count
distinct column…
URL: https://github.com/apache/kylin/pull/147#issuecomment-394209787
 
 
   LGTM

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> Enforce global dictionary for bitmap count distinct column
> ----------------------------------------------------------
>
>                 Key: KYLIN-3161
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3161
>             Project: Kylin
>          Issue Type: Improvement
>          Components: Measure - Count Distinct
>            Reporter: Shaofeng SHI
>            Priority: Major
>
> For bitmap based count distinct column (as the data type is not int), a Global dictionary
is required. But now user can use normal dictionary, which may cause incorrect result.



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