[jira] [Created] (ARROW-18356) [R] Handle as_data_frame argument if passed into open_dataset for CSVs

["Nicola Crane (Jira)" <ji...@apache.org>]

Nicola Crane created ARROW-18356:
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             Summary: [R] Handle as_data_frame argument if passed into open_dataset for CSVs
                 Key: ARROW-18356
                 URL: https://issues.apache.org/jira/browse/ARROW-18356
             Project: Apache Arrow
          Issue Type: Sub-task
          Components: R
            Reporter: Nicola Crane


Currently, if the argument {{as_data_frame}} is passed into {{open_dataset()}} with a CSV format dataset, the error message returned is:

{code:r}
Error: The following option is supported in "read_delim_arrow" functions but not yet supported here: "as_data_frame"
{code}

Instead, we could silently ignore it if as_data_frame is set to {{FALSE}} and give a more helpful error if set to {{TRUE}} (i.e. direct user to call {{as.data.frame()}} or {{collect()}}).

Reasoning: it'd be great to get to a point where users can just swap their {{read_csv_arrow()}} syntax for {{open_dataset()}} and get helpful results.



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