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  1. Apache Hudi
  2. HUDI-789

Adjust logic of upsert in HDFSParquetImporter

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      In HDFSParquetImporter, upsert is equivalent to insert (remove old metadata, then insert). But upsert means update and insert on old data. 

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              hongdongdong hong dongdong
              hongdongdong hong dongdong
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