[GitHub] [arrow] thisisnic commented on issue #36325: [R] read_csv_arrow number of rows to read, file reader options docs

["thisisnic (via GitHub)" <gi...@apache.org>]

thisisnic commented on issue #36325:
URL: https://github.com/apache/arrow/issues/36325#issuecomment-1609738413

   Thanks for reporting this @tdhock .  Unfortunately, it's not possible to limit the number of lines to read, due to how the C++ CSV reader has been implemented; more information can be seen in the discussion on #26399.  If you tell us more about the context in which you're needing to do this, we may be able to suggest a good workaround though?
   
   Just to check, where are you reading the `read_csv_arrow()` docs?  When I read them on the pkgdown site, they link to the `?CsvReadOptions` man page, which outlines these in more details, but I'm wondering if this link might not be present in a different presentation of the docs?  I'd be hesitant to add them all into that man page as we've intentionally designed `read_csv_arrow()` to translate from the `readr::read_csv()` options we support to the matching Arrow C++ options, and thus mentioning all of the Arrow C++ options in one page might be a bit too much info at once.  If you can think of a better way of exposing the relevant options (there probably is one), I'd be happy to review a PR if you'd like to make one? (If you do, let's attach it to a different issue though, as this is slightly different to the original one here).
   
   


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