[R] slice_sample does not sample randomly

[blongworth]

Describe the bug, including details regarding any error messages, version, and platform.

slice_sample() in Arrow 18.1.0 does not randomly sample rows from an arrow dataset. Reprex follows. I'd expect a random sample of rows, so x distributed in 1:5000.

library(dplyr)
library(arrow)

df <- data.frame(x = 1:5000)

ds <- arrow_table(df)

slice_sample(ds, n = 10) |> 
  collect()
#> # A tibble: 10 × 1
#>        x
#>    <int>
#>  1     3
#>  2     4
#>  3    16
#>  4    17
#>  5    65
#>  6    66
#>  7    74
#>  8    93
#>  9   123
#> 10   129

^{Created on 2024-12-31 with reprex v2.1.1}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.4.2 (2024-10-31)
#>  os       macOS Sonoma 14.7
#>  system   aarch64, darwin20
#>  ui       X11
#>  language (EN)
#>  collate  en_US.UTF-8
#>  ctype    en_US.UTF-8
#>  tz       America/New_York
#>  date     2024-12-31
#>  pandoc   3.2 @ /Applications/RStudio.app/Contents/Resources/app/quarto/bin/tools/aarch64/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version date (UTC) lib source
#>  arrow       * 18.1.0  2024-12-05 [1] CRAN (R 4.4.1)
#>  assertthat    0.2.1   2019-03-21 [1] CRAN (R 4.4.0)
#>  bit           4.0.5   2022-11-15 [1] CRAN (R 4.4.0)
#>  bit64         4.0.5   2020-08-30 [1] CRAN (R 4.4.0)
#>  cli           3.6.2   2023-12-11 [1] CRAN (R 4.4.0)
#>  digest        0.6.35  2024-03-11 [1] CRAN (R 4.4.0)
#>  dplyr       * 1.1.4   2023-11-17 [1] CRAN (R 4.4.0)
#>  evaluate      0.23    2023-11-01 [1] CRAN (R 4.4.0)
#>  fansi         1.0.6   2023-12-08 [1] CRAN (R 4.4.0)
#>  fastmap       1.1.1   2023-02-24 [1] CRAN (R 4.4.0)
#>  fs            1.6.4   2024-04-25 [1] CRAN (R 4.4.0)
#>  generics      0.1.3   2022-07-05 [1] CRAN (R 4.4.0)
#>  glue          1.7.0   2024-01-09 [1] CRAN (R 4.4.0)
#>  htmltools     0.5.8.1 2024-04-04 [1] CRAN (R 4.4.0)
#>  knitr         1.46    2024-04-06 [1] CRAN (R 4.4.0)
#>  lifecycle     1.0.4   2023-11-07 [1] CRAN (R 4.4.0)
#>  magrittr      2.0.3   2022-03-30 [1] CRAN (R 4.4.0)
#>  pillar        1.9.0   2023-03-22 [1] CRAN (R 4.4.0)
#>  pkgconfig     2.0.3   2019-09-22 [1] CRAN (R 4.4.0)
#>  purrr         1.0.2   2023-08-10 [1] CRAN (R 4.4.0)
#>  R6            2.5.1   2021-08-19 [1] CRAN (R 4.4.0)
#>  reprex        2.1.1   2024-07-06 [1] CRAN (R 4.4.0)
#>  rlang         1.1.3   2024-01-10 [1] CRAN (R 4.4.0)
#>  rmarkdown     2.26    2024-03-05 [1] CRAN (R 4.4.0)
#>  rstudioapi    0.16.0  2024-03-24 [1] CRAN (R 4.4.0)
#>  sessioninfo   1.2.2   2021-12-06 [1] CRAN (R 4.4.0)
#>  tibble        3.2.1   2023-03-20 [1] CRAN (R 4.4.0)
#>  tidyselect    1.2.1   2024-03-11 [1] CRAN (R 4.4.0)
#>  utf8          1.2.4   2023-10-22 [1] CRAN (R 4.4.0)
#>  vctrs         0.6.5   2023-12-01 [1] CRAN (R 4.4.0)
#>  withr         3.0.0   2024-01-16 [1] CRAN (R 4.4.0)
#>  xfun          0.49    2024-10-31 [1] CRAN (R 4.4.1)
#>  yaml          2.3.8   2023-12-11 [1] CRAN (R 4.4.0)
#> 
#>  [1] /Library/Frameworks/R.framework/Versions/4.4-arm64/Resources/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

As this issue could be dangerous for someone assuming a random sample, should there be a note in the docs or slice_sample() removed until it's fixed?

Component(s)

R