library(tidyverse)
library(arrow)
car_info <- rownames_to_column(mtcars, "car_info")
cars_arrow_table <- arrow_table(car_info)
other_mtcars_data <- select(car_info, 1) %>%
mutate(main_color = sample( c("red", "blue", "white", "black"), size = n(), replace = TRUE)) %>%
arrow::arrow_table()
temp <- tempdir()
par_temp <- paste0(temp, "\\parquet")
car_info %>% arrow::write_dataset(par_temp)
cars_arrow <- arrow::open_dataset(par_temp)
# using arrow tables works ------------------------------------------------------
cars_arrow_table %>% left_join(other_mtcars_data) %>% count(main_color) %>% collect()
# using open dataset crashes R ------------------------------------------------------------------
other_mtcars_data %>%
left_join(cars_arrow) %>%
count(main_color) %>%
collect()
#other variation also crash
cars_arrow %>%
left_join(other_mtcars_data) %>%
count(main_color) %>%
collect()
cars_arrow %>%
left_join(other_mtcars_data) %>%
group_by(main_color) %>%
summarise(n = n()) %>%
collect()
#compute also crashes
cars_arrow %>%
left_join(other_mtcars_data) %>%
count(main_color) %>%
compute()
# workaround with duckdb ------------------------------------------------------
##this works
cars_duck <- to_duckdb(cars_arrow, auto_disconnect = TRUE)
other_cars_duck <- to_duckdb(other_mtcars_data, auto_disconnect = TRUE)
cars_duck %>%
left_join(other_cars_duck) %>%
count(main_color) %>%
collect()
##this doesn't (don't know if expected to work actually)
cars_arrow %>%
left_join(other_mtcars_data) %>%
to_duckdb()
Bug
Critical
