eitsupi commented on code in PR #33968:
URL: https://github.com/apache/arrow/pull/33968#discussion_r1095744610
##########
r/R/csv.R:
##########
@@ -198,6 +205,14 @@ read_delim_arrow <- function(file,
)
}
+ if (inherits(file, "AsIs")) {
+ if (is.raw(file)) {
+ file <- unclass(file)
Review Comment:
Without it, wrapping `I()` around a raw vector will cause it to fail to read.
This behavior can be seen in the current version of arrow.
```r
> "a\n1" |> charToRaw() |> arrow::read_csv_arrow()
a
1 1
> "a\n1" |> charToRaw() |> I() |> arrow::read_csv_arrow()
Error: file must be a "InputStream"
```
On the other hand, `readr::read_csv()` can read raw vectors with or without
`I()`, so I thought it necessary to unclass `AsIs` here for consistency of
behavior.
```r
> "a\n1" |> charToRaw() |> readr::read_csv()
Rows: 1 Columns: 1
── Column specification
────────────────────────────────────────────────────────────────────────────────────────────────
Delimiter: ","
dbl (1): a
ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this
message.
# A tibble: 1 × 1
a
<dbl>
1 1
> "a\n1" |> charToRaw() |> I() |> readr::read_csv()
Rows: 1 Columns: 1
── Column specification
────────────────────────────────────────────────────────────────────────────────────────────────
Delimiter: ","
dbl (1): a
ℹ Use `spec()` to retrieve the full column specification for this data.
ℹ Specify the column types or set `show_col_types = FALSE` to quiet this
message.
# A tibble: 1 × 1
a
<dbl>
1 1
```
Perhaps we should mention this in the comments?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
