[ARROW-14103] [R] [C++] Allow min/max in grouped aggregation

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Fix Version/s: 6.0.0
• Component/s: C++, R
• External issue URL: https://github.com/apache/arrow/issues/29694
• Assignee: Unassigned
• Reporter: Jonathan Keane
• Created: 23/Sep/21 15:16
• Updated: 11/Jan/23 08:37
• Resolved: 23/Sep/21 18:27

Description

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

> 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

Issue Links

• duplicates: ARROW-13502 [R] Bindings for min/max aggregation