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  1. Apache Arrow
  2. ARROW-14008

[R][Compute] ExecPlan_run should return RecordBatchReader instead of Table

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      Wrapping a sink node's output as a RecordBatchReader is already supported in c++. Currently a table is returned in R's ExecPlan_run to skirt difficult lifetime considerations, but it'd be more correct to allow streaming batches out of an ExecPlan instead of doing all work before ExecPlan_run returns.

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              bkietz Ben Kietzman
              bkietz Ben Kietzman
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