SHIMA Tatsuya created ARROW-17085:
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Summary: [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
{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}
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