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Posted to jira@arrow.apache.org by "Ian Cook (Jira)" <ji...@apache.org> on 2021/05/26 15:16:00 UTC

[jira] [Closed] (ARROW-12292) [R] Reconsider behavior of as..ArrowDatum functions

     [ https://issues.apache.org/jira/browse/ARROW-12292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ian Cook closed ARROW-12292.
----------------------------
    Resolution: Not A Problem

Closing this for now because the current behavior seems fine. Can reopen later if we decide to reconsider this.

> [R] Reconsider behavior of as.<type>.ArrowDatum functions
> ---------------------------------------------------------
>
>                 Key: ARROW-12292
>                 URL: https://issues.apache.org/jira/browse/ARROW-12292
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Ian Cook
>            Assignee: Ian Cook
>            Priority: Major
>
> As discussed at [https://github.com/apache/arrow/pull/9942#issuecomment-815315840,] the {{as.double()}}, {{as.integer()}}, and {{as.character()}} methods for {{ArrowDatum}} return R vectors of the specified R types, whereas in dplyr, these same functions perform casts to the analogous Arrow types 
> Compare the definitions:
>  * {{ArrowDatum}} methods: [https://github.com/apache/arrow/blob/ace2bfc160e049b4edc7ffb55081cfb7210d6e43/r/R/arrow-datum.R#L139-L145]
>  * dplyr functions: [https://github.com/apache/arrow/blob/f2db785c24015b102db9b268c67a6ea73c5d7e93/r/R/dplyr.R#L399-L432]
> Consider whether the {{ArrowDatum}} methods should instead perform casts but keep the data in Arrow so that the user would have to also call {{as.vector()}} to return the data as an R vector.



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