[
https://issues.apache.org/jira/browse/ARROW-17085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17567235#comment-17567235
]
SHIMA Tatsuya commented on ARROW-17085:
---------------------------------------
> You may also want to change groups() to return an empty list() instead of
> NULL.
I was not aware of this. I will take a look at this too.
> [R] group_vars(<ArrowTabular>) returns NULL
> -------------------------------------------
>
> Key: ARROW-17085
> URL: https://issues.apache.org/jira/browse/ARROW-17085
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Affects Versions: 8.0.0
> Reporter: SHIMA Tatsuya
> Priority: Major
>
> {code:r}
> mtcars |> dplyr::group_vars()
> #> character(0)
> mtcars |> arrow:::as_adq() |> dplyr::group_vars()
> #> character(0)
> mtcars |> arrow::arrow_table() |> dplyr::group_vars()
> #> NULL
> {code}
> {{dplyr::group_vars(<data.frame>)}} does not return NULL, so the following
> code will result in an error.
> {code:r}
> mtcars |> arrow::arrow_table() |> dtplyr::lazy_dt()
> #> Error in new_step(parent, vars = names(parent), groups = groups, locals =
> list(), : is.character(groups) is not TRUE
> {code}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
