[ARROW-14586] [R] summarise() with nested aggregate expressions has a confusing error

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: R
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/30134
• Assignee: Dewey Dunnington
• Reporter: Dewey Dunnington
• Created: 04/Nov/21 12:31
• Updated: 11/Jan/23 08:40
• Resolved: 01/Dec/21 08:32

Description

This affects code along the lines of summarise(mean(mean(var)) where the inner expression is an aggregate function. This is probably not useful but the error it gives is not particularly helpful:

library(arrow, warn.conflicts = FALSE)
library(dplyr, warn.conflicts = FALSE)
RecordBatch$create(x = 4) %>% 
  summarise(y = mean(mean(x)))
#> Warning: Error in mean(..temp0) : object '..temp0' not found; pulling data into
#> R
#> # A tibble: 1 × 1
#>       y
#>   <dbl>
#> 1     4

Issue Links

• links to: GitHub Pull Request #11777