Jonathan Keane created ARROW-14027:
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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}
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