do_join/anti_join ignore na_action

[r2evans]

Describe the bug, including details regarding any error messages, version, and platform.

library(dplyr)
library(arrow)

dat1 <- data.frame(a=1:5, b=c(11:14, NA))
dat2 <- dat1[-3,]
dat1arr <- arrow_table(dat1)
dat2arr <- arrow_table(dat2)

anti_join(dat1, dat2, by = names(dat1), na_matches = "na")
#   a  b
# 1 3 13
anti_join(dat1arr, dat2arr, by = names(dat1), na_matches = "na") |>
  collect()
# # A tibble: 2 × 2
#       a     b
#   <int> <int>
# 1     3    13
# 2     5    NA

I see https://github.com/apache/arrow/blob/main/r/R/dplyr-join.R#L31 from commit c273ea7 in Sep 2021, is there a timeline for implementation?

Component(s)

R

[r2evans]

dupe of #37902