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      VectorizedOrcInputFormat is introduced to read orc data in batches.

      When returning each row of data, instead of actually retrieving each field, we use BaseRow's abstraction to return a Columnar Row-like view.

      This will greatly improve the downstream filtered scenarios, so that there is no need to access redundant fields on the filtered data.

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              lzljs3620320 Jingsong Lee
              lzljs3620320 Jingsong Lee
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