[jira] [Created] (ARROW-14027) [R] Allow me to group_by + summarise() with partitioning fields

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

Jonathan Keane created ARROW-14027:
--------------------------------------

             Summary: [R] Allow me to group_by + summarise() with partitioning fields 
                 Key: ARROW-14027
                 URL: https://issues.apache.org/jira/browse/ARROW-14027
             Project: Apache Arrow
          Issue Type: Bug
          Components: R
            Reporter: Jonathan Keane
             Fix For: 6.0.0


If one puts a field that is one of the partitioning variables in {{group_by()}} and then summarises, we get a segfault:

{code:r}
library(arrow)
library(dplyr)

temp <- tempfile()

write_dataset(mtcars, path = temp, partitioning = "cyl")

ds <- open_dataset(temp)

# this works just fine
ds %>% 
  group_by(gear) %>% 
  summarise(
    sum(mpg)
  ) %>% 
  collect()

# however this segfaults (regardless of the aggregation, even simply n()) 
#  *** caught segfault ***
# address 0x0, cause 'memory not mapped'
ds %>% 
  group_by(cyl) %>% 
  summarise(
    sum(mpg)
  ) %>% 
  collect()
{code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)