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https://issues.apache.org/jira/browse/ARROW-14919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson updated ARROW-14919:
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Issue Type: Bug (was: Improvement)
> [R] write_parquet() drops attributes for grouped dataframes
> -----------------------------------------------------------
>
> Key: ARROW-14919
> URL: https://issues.apache.org/jira/browse/ARROW-14919
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 6.0.1
> Environment: Linux
> Reporter: Miles McBain
> Priority: Major
>
> Reprex:
> {code:r}
> library(dplyr)
> #>
> #> Attaching package: 'dplyr'
> #> The following objects are masked from 'package:stats':
> #>
> #> filter, lag
> #> The following objects are masked from 'package:base':
> #>
> #> intersect, setdiff, setequal, union
> library(purrr)
> library(arrow)
> #>
> #> Attaching package: 'arrow'
> #> The following object is masked from 'package:utils':
> #>
> #> timestamp
> attr(mtcars, "etag") <- "test"
> mtcars_grouped <-
> mtcars |>
> group_by("cyl")write_parquet(mtcars, "mtcars.parquet")
> read_parquet("mtcars.parquet") |>
> attributes() |>
> pluck("etag")
> #> [1] "test"write_parquet(mtcars_grouped, "mtcars_grouped.parquet")
> read_parquet("mtcars_grouped.parquet") |>
> attributes() |>
> pluck("etag")
> #> NULLunlink("mtcars_grouped.parquet")
> unlink("mtcars.parquet") {code}
> <sup>Created on 2021-11-30 by the [reprex
> package]([https://reprex.tidyverse.org|https://reprex.tidyverse.org/])
> (v2.0.1)</sup>
> Attributes are preserved for ungrouped data but unexpectedly dropped for
> grouped data. May affect other read/write formats.
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