[jira] [Commented] (ARROW-13985) [R] Warning/error if dplyr::summarise() called when column is renamed but the original should be displayed in output too

["Nicola Crane (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-13985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17414806#comment-17414806 ] 

Nicola Crane commented on ARROW-13985:
--------------------------------------

Probably more complicated than this, but I think it basically needs something like this: https://github.com/apache/arrow/blob/672149b68f3c8878e0f62a1bfde122092d734c0d/r/R/dplyr-mutate.R#L74-L85

> [R] Warning/error if dplyr::summarise() called when column is renamed but the original should be displayed in output too
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-13985
>                 URL: https://issues.apache.org/jira/browse/ARROW-13985
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: R
>            Reporter: Nicola Crane
>            Priority: Minor
>
> I was playing around with contrived examples to come up with tests for the dplyr::distinct() implementation, and tried this code:
> {code:java}
> tbl <- example_data
> tbl$some_grouping <- rep(c(1, 2), 5)
> tbl %>% Table$create() %>%
>        group_by(some_grouping, false, lgl) %>%
>        summarise(x = lgl) %>%
>        collect()
> {code}
> but got this warning/error message:
> {{Warning: Error in .f(.x[[i]], ...) : attempt to apply non-function; pulling data into R}}



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