[jira] [Commented] (ARROW-14904) [C++] Enable CSV Writer to append / overwrite existing file

["Dragoș Moldovan-Grünfeld (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-14904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17452297#comment-17452297 ] 

Dragoș Moldovan-Grünfeld commented on ARROW-14904:
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[~apitrou] I don't think we do. There is functionality we're not emulating - for example, the {{num_threads}} argument in {{readr::write_csv()}} - mostly because multithreading is implemented differently in {{{}arrow{}}}. On the real-world use - I've definitely used the {{readr::write_csv(..., append = TRUE)}} functionality in the past. 

Any thoughts [~npr], [~ianmcook] [~jonkeane]?

> [C++] Enable CSV Writer to append / overwrite existing file
> -----------------------------------------------------------
>
>                 Key: ARROW-14904
>                 URL: https://issues.apache.org/jira/browse/ARROW-14904
>             Project: Apache Arrow
>          Issue Type: Sub-task
>          Components: C++
>            Reporter: Dragoș Moldovan-Grünfeld
>            Priority: Major
>
> This would be a match for the {{readr::write_csv()}} {{append}} argument: boolean. If {{FALSE}} will overwrite existing file. If {{TRUE}} will append to existing file. In both cases, if the file doesn't exist, a new file is created. 



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