[ARROW-17885] [R] Return BLOB data as list of raw instead of a list of integers

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 9.0.1, 10.0.0
• Fix Version/s: 10.0.0
• Component/s: R
• Labels: pull-request-available
• Environment: macOS arm64, R 4.1.3
• External issue URL: https://github.com/apache/arrow/issues/20437
• Assignee: Dewey Dunnington
• Reporter: Kirill Müller
• Created: 29/Sep/22 03:24
• Updated: 11/Jan/23 11:56
• Resolved: 10/Oct/22 20:08

Description

BLOBs should be mapped to lists of raw in R, not lists of integer. Tested with ec714db3995549309b987fc8112db98bb93102d0.

library(arrow)
#> Some features are not enabled in this build of Arrow. Run `arrow_info()` for more information.
#> 
#> Attaching package: 'arrow'
#> The following object is masked from 'package:utils':
#> 
#>     timestamp

data <- data.frame(
  a = 1:3,
  b = 2.5,
  c = "three",
  stringsAsFactors = FALSE
)
data$d <- blob::blob(as.raw(1:10))

tbl <- arrow::as_arrow_table(data)
rbr <- arrow::as_record_batch_reader(tbl)

waldo::compare(as.data.frame(rbr$read_next_batch()), data)
#> `old$d[[1]]` is an integer vector (1, 2, 3, 4, 5, ...)
#> `new$d[[1]]` is a raw vector (01, 02, 03, 04, 05, ...)
#> 
#> `old$d[[2]]` is an integer vector (1, 2, 3, 4, 5, ...)
#> `new$d[[2]]` is a raw vector (01, 02, 03, 04, 05, ...)
#> 
#> `old$d[[3]]` is an integer vector (1, 2, 3, 4, 5, ...)
#> `new$d[[3]]` is a raw vector (01, 02, 03, 04, 05, ...)

Issue Links

• links to: GitHub Pull Request #14277