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https://issues.apache.org/jira/browse/ARROW-17737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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SHIMA Tatsuya updated ARROW-17737:
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Issue Type: Bug (was: Improvement)
> [R] Continue to retain grouping metadata even if ungroup arrow dplyr query
> --------------------------------------------------------------------------
>
> Key: ARROW-17737
> URL: https://issues.apache.org/jira/browse/ARROW-17737
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 9.0.0
> Reporter: SHIMA Tatsuya
> Priority: Major
>
> Perhaps {{metadata$r$attributes$.group_vars}} needs to be removed when it
> becomes an arrow dplyr query.
> And it must also be written back again when converted to a Table.
> {code:r}
> mtcars |> dplyr::group_by(cyl) |> arrow::arrow_table() |> dplyr::ungroup() |>
> as.data.frame() |> dplyr::group_vars()
> #> character(0)
> mtcars |> dplyr::group_by(cyl) |> arrow:::as_adq() |> dplyr::ungroup() |>
> as.data.frame() |> dplyr::group_vars()
> #> [1] "cyl"
> {code}
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