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https://issues.apache.org/jira/browse/ARROW-5949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17091555#comment-17091555
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Mahmut Bulut commented on ARROW-5949:
-------------------------------------
For the reference implementation that I am talking about, please take a look at
the `TestStringDictionaryAppendIndices` in cxx implementation for how nulls are
handled in arrow cxx implementation.
> [Rust] Implement DictionaryArray
> --------------------------------
>
> Key: ARROW-5949
> URL: https://issues.apache.org/jira/browse/ARROW-5949
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Rust
> Reporter: David Atienza
> Assignee: David Atienza
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.17.0
>
> Time Spent: 18h
> Remaining Estimate: 0h
>
> I am pretty new to the codebase, but I have seen that DictionaryArray is not
> implemented in the Rust implementation.
> I went through the list of issues and I could not see any work on this. Is
> there any blocker?
>
> The specification is a bit
> [short|https://arrow.apache.org/docs/format/Layout.html#dictionary-encoding]
> or even
> [non-existant|https://arrow.apache.org/docs/format/Metadata.html#dictionary-encoding],
> so I am not sure how to implement it myself.
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