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