assignUser opened a new issue, #38903: URL: https://github.com/apache/arrow/issues/38903
### Describe the enhancement requested In a recent [SO](https://stackoverflow.com/questions/77557377/how-to-convert-int-to-double-when-using-arrow-to-read-in-multiple-csvs-with-open) question about using partial schemas in `open_dataset` (which is possible using `col_types`) even a seasond arrow user did not know about the proper solution. The docs for open_dataset hide a lot of more specialized options behind a `...` and it it's not obvious how to find those as the linked dataset factory page also doesn't show all possibility. Some are explained in the specialized wrapper functions like https://arrow.apache.org/docs/r/reference/open_delim_dataset.html or https://arrow.apache.org/docs/r/reference/csv_convert_options.html but even there col_types is not described in a way that makes it obvious that it is to be used to pass in partial schemas. At the minimum the doc strings for `col_types` should make the inteded uses case clear, ideally we should link to the detailed descriptions from `open_dataset` or find another way to document the possible options more visibly. ### Component(s) Documentation, 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
