jimjam-slam opened a new issue, #45901: URL: https://github.com/apache/arrow/issues/45901
### Describe the enhancement requested The `arrow` R package presently (and reasonably) appears to reject ragged CSV input: ```r library(arrow) csv_string <- "name,group,score North,A,5 East,A West,B,7 South " read_csv_arrow(I(csv_string)) # Error: # ! Invalid: CSV parse error: Expected 3 columns, got 2: East,A # Run `rlang::last_trace()` to see where the error occurred. ``` There is a convert option `include_missing_columns`, but this appears to refer to columns that are completely absent from the file, not ones that are specified I the header but missing in some (or even all) rows. The `strings_can_be_null` option also does not apply to ragged rows. It would be great if users could supply an option to fill ragged rows with a type-relevant missing value (in R I assume that would either be an `NA_*_` for atomic types or `NULL` for non-atomic ones, but perhaps a user-supplied value would be more appropriate). R: 4.4.1 Arrow: 19.0.1 OS: macOS 15.3.2 ### Component(s) R -- 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: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
