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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2017/06/28 01:27:00 UTC

[jira] [Commented] (ARROW-1160) C++: Implement DictionaryBuilder

    [ https://issues.apache.org/jira/browse/ARROW-1160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16065770#comment-16065770 ] 

Wes McKinney commented on ARROW-1160:
-------------------------------------

I didn't move the dictionary encoder from {{parquet/encoding.h}} but it should be easy enough to adapt (didn't make sense to move to Arrow because it run-length encodes the indices)

> C++: Implement DictionaryBuilder
> --------------------------------
>
>                 Key: ARROW-1160
>                 URL: https://issues.apache.org/jira/browse/ARROW-1160
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Uwe L. Korn
>            Assignee: Uwe L. Korn
>             Fix For: 0.5.0
>
>
> Now that we have a hash table inside of Arrow, I would start to implement a DictionaryBuilder for primitive types based on the AdaptiveIntBuilder.



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