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https://issues.apache.org/jira/browse/ARROW-8374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17109145#comment-17109145
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Neal Richardson commented on ARROW-8374:
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Presumably there's already a C++ function that does this that we can call, yeah?

> [R] Table to vector of DictonaryType will error when Arrays don't have the 
> same Dictionary per array
> ----------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-8374
>                 URL: https://issues.apache.org/jira/browse/ARROW-8374
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>            Reporter: Francois Saint-Jacques
>            Priority: Major
>             Fix For: 1.0.0
>
>
> The conversion should accommodate Unifying the dictionary before converting, 
> otherwise the indices are simply broken



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