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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2019/02/06 04:08:00 UTC

[jira] [Commented] (ARROW-1574) [C++] Implement kernel function that converts a dense array to dictionary given known dictionary

    [ https://issues.apache.org/jira/browse/ARROW-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16761442#comment-16761442 ] 

Wes McKinney commented on ARROW-1574:
-------------------------------------

Values not found in the dictionary become null

> [C++] Implement kernel function that converts a dense array to dictionary given known dictionary
> ------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-1574
>                 URL: https://issues.apache.org/jira/browse/ARROW-1574
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>              Labels: Analytics
>             Fix For: 0.14.0
>
>
> This may simply be a special case of cast using a dictionary type



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