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  1. Apache Arrow
  2. ARROW-14284

[C++][Python] Improve error message when trying use SyncScanner when requiring async

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 6.0.0
    • C++

    Description

      See ARROW-14257

      The current error message gives "Asynchronous scanning is not supported by SyncScanner"

      Copying the comment of westonpace:

      In Python it is always use_async=True. In R the scanner is hidden from the user on dataset writes but the option there is use_async as well. In C++ the option is UseAsync in the ScannerBuilder. How about,

      "Writing datasets requires that the input scanner is configured to scan asynchronously via the use_async or UseAsync options."

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              westonpace Weston Pace
              jorisvandenbossche Joris Van den Bossche
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