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https://issues.apache.org/jira/browse/ARROW-1518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney closed ARROW-1518.
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Resolution: Won't Fix
Assignee: Wes McKinney
Now that Feather supports zero-copy reads into Arrow, the preferred approach
would be to zero-copy read the file, add a column, then write a new Feather file
> [C++/Python] Append column to Feather file
> ------------------------------------------
>
> Key: ARROW-1518
> URL: https://issues.apache.org/jira/browse/ARROW-1518
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
>
> see e.g. https://github.com/wesm/feather/issues/314
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