[jira] [Created] (ARROW-14103) [R] [C++] Allow min/max in grouped aggregation

["Jonathan Keane (Jira)" <ji...@apache.org>]

Jonathan Keane created ARROW-14103:
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             Summary: [R] [C++] Allow min/max in grouped aggregation
                 Key: ARROW-14103
                 URL: https://issues.apache.org/jira/browse/ARROW-14103
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++, R
            Reporter: Jonathan Keane


Both {{min()}} and {{max()}} work in non-grouped aggregation and elsewhere, but with a grouped aggregation, we get a not-supported error:

{code}
> library(arrow)
> library(dplyr)
> 
> InMemoryDataset$create(mtcars) %>% 
+   group_by(cyl) %>% 
+   summarise(min_mpg = min(mpg))
Warning: Error : Expression min(mpg) not supported in Arrow; pulling data into R
# A tibble: 3 × 2
    cyl min_mpg
  <dbl>   <dbl>
1     4    21.4
2     6    17.8
3     8    10.4
{code}



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