[R] arrow::read_csv_arrow namespace error when package not loaded

[asfimport]

I am not sure if the arrow::read_csv_arrow() error below is a bug or a feature?

data("iris")
write.csv(iris, "iris.csv")
test <- arrow::read_csv_arrow("iris.csv")
Error in read_delim_arrow(file = "iris.csv", delim = ",") :
could not find function "read_delim_arrow"
test <- arrow::read_delim_arrow("iris.csv")
sessionInfo()
R version 3.6.1 (2019-07-05)
Platform: x86_64-apple-darwin18.6.0 (64-bit)
Running under: macOS Mojave 10.14.6
Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /usr/local/Cellar/openblas/0.3.7/lib/libopenblasp-r0.3.7.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats graphics grDevices utils datasets
[6] methods base

loaded via a namespace (and not attached):
[1] tidyselect_0.2.5 bit_1.1-14 compiler_3.6.1
[4] magrittr_1.5 assertthat_0.2.1 R6_2.4.0
[7] tools_3.6.1 fs_1.3.1 glue_1.3.1
[10] Rcpp_1.0.2 bit64_0.9-7 arrow_0.14.1.1
[13] rlang_0.4.0 purrr_0.3.2

Reporter: Hugh Miles
Assignee: Neal Richardson / @nealrichardson

PRs and other links:

• GitHub Pull Request #5223

_{Note: This issue was originally created as ARROW-6348. Please see the migration documentation for further details.}

[asfimport]

Neal Richardson / @nealrichardson:
It's a namespace issue. That shouldn't error and I can make it work, but you can solve this now by just loading library(arrow):

> write.csv(iris, "iris.csv")
> test <- arrow::read_csv_arrow("iris.csv")
Error in read_delim_arrow(file = "iris.csv", delim = ",") : 
  could not find function "read_delim_arrow"
> library(arrow)

Attaching package: ‘arrow’

The following object is masked from ‘package:utils’:

    timestamp

> test <- read_csv_arrow("iris.csv")
> head(test)
        Sepal.Length Sepal.Width Petal.Length Petal.Width    Species
1     1          5.1         3.5          1.4         0.2     setosa
2     2          4.9         3.0          1.4         0.2     setosa
3     3          4.7         3.2          1.3         0.2     setosa
4     4          4.6         3.1          1.5         0.2     setosa
5     5          5.0         3.6          1.4         0.2     setosa
6     6          5.4         3.9          1.7         0.4     setosa

[asfimport]

Hugh Miles:
I am now having a slightly different error.. appears to be caused by "~/"?

library("arrow")
data("iris")
write.csv(iris, "/iris.csv", row.names = FALSE)
test1 <- arrow::read_csv_arrow("/iris.csv")
Error in io___MemoryMappedFile__Open(fs::path_abs(path), mode) :
IOError: Failed to open local file '/iris.csv', error: No such file or directory
test2 <- read.csv("/iris.csv")

[asfimport]

Neal Richardson / @nealrichardson:
Yeah, I hit that last week too. Will be fixed by ARROW-6323. You can work around in the meantime by using normalizePath() if you have a tilde in your file path.

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 5223
#5223