[jira] [Closed] (ARROW-4083) [C++] Allowing ChunkedArrays to contain a mix of DictionaryArray and dense Array (of the dictionary type)

["Wes McKinney (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-4083?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney closed ARROW-4083.
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    Resolution: Won't Fix

I will take care of this elsewhere when it is actually needed

> [C++] Allowing ChunkedArrays to contain a mix of DictionaryArray and dense Array (of the dictionary type)
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-4083
>                 URL: https://issues.apache.org/jira/browse/ARROW-4083
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Priority: Major
>              Labels: dataframe
>
> In some applications we may receive a stream of some dictionary encoded data followed by some non-dictionary encoded data. For example this happens in Parquet files when the dictionary reaches a certain configurable size threshold.
> We should think about how we can model this in our in-memory data structures, and how it can flow through to relevant computational components (i.e. certain data flow observers -- like an Aggregation -- might need to be able to process either a dense or dictionary encoded version of a particular array in the same stream)



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