[jira] [Created] (ARROW-14644) [R] open_dataset doesn't ignore BOM in csv file

["Andy Teucher (Jira)" <ji...@apache.org>]

Andy Teucher created ARROW-14644:
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             Summary: [R] open_dataset doesn't ignore BOM in csv file
                 Key: ARROW-14644
                 URL: https://issues.apache.org/jira/browse/ARROW-14644
             Project: Apache Arrow
          Issue Type: Bug
          Components: R
    Affects Versions: 6.0.0
         Environment: macOS Mojave, R 4.1.1
            Reporter: Andy Teucher


When a CSV file starts with byte order mark, {{arrow::open_dataset()}} reads the file but populates the first column with {{NA}} values. It appears a similar issue was raised and fixed here. {{read_csv_arrow()}} deals with the BOM correctly.

Reproducible Example:
{code:java}
library(arrow)
library(dplyr)

writeLines('\xef\xbb\xbfa,b\n1,2\n', con = "testfile.csv")

read_csv_arrow("testfile.csv") # works
#> # A tibble: 1 × 2
#> a b
#> <int> <int>
#> 1 1 2

open_dataset("testfile.csv", format = "csv") |> 
  collect()
#> # A tibble: 1 × 2
#> a b
#> <int> <int>
#> 1 NA 2 {code}



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