Commits
Weston Pace authored and David Li committed d920695956c
ARROW-12392: [C++] Restore asynchronous streaming CSV reader This restores ARROW-11887. The only difference is that I kept the async path out of RecordBatchReader. I now know the file formats do not use RecordBatchReader for the read so there was no need to add it in there yet. It also now properly consumes (using RunInSerialExecutor) the reader via the nested parallel paths in the synchronous scanner. Closes #10061 from westonpace/feature/arrow-12392 Authored-by: Weston Pace <weston.pace@gmail.com> Signed-off-by: David Li <li.davidm96@gmail.com>