[jira] [Assigned] (ARROW-18199) [R] Misleading error message in query using across()

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

     [ https://issues.apache.org/jira/browse/ARROW-18199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nicola Crane reassigned ARROW-18199:
------------------------------------

    Assignee: Nicola Crane

> [R] Misleading error message in query using across()
> ----------------------------------------------------
>
>                 Key: ARROW-18199
>                 URL: https://issues.apache.org/jira/browse/ARROW-18199
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: R
>            Reporter: Nicola Crane
>            Assignee: Nicola Crane
>            Priority: Critical
>
> Error handling looks like it's happening in the wrong place - a comma has been missed in the {{select()}} but it's wrongly appearing like it's an issue with {{across()}}.  Can we do something to make this not happen?
> {code:r}
> download.file(
>   url = "https://github.com/djnavarro/arrow-user2022/releases/download/v0.1/nyc-taxi-tiny.zip",
>   destfile = here::here("data/nyc-taxi-tiny.zip")
> )
> library(arrow)
> library(dplyr)
> open_dataset("data") %>%
>   select(pickup_datetime, pickup_longitude, pickup_latitude ends_with("amount")) %>%
>   mutate(across(ends_with("amount"), ~.x * 0.87, .names = "{.col}_gbp")) %>%
>   collect()
> {code}
> {code:r}
> Error in `across()`:
> ! Must be used inside dplyr verbs.
> Run `rlang::last_error()` to see where the error occurred.
> {code}



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