nicolas paris created HIVE-20917:

             Summary: OpenCSVSerde quotes all columns
                 Key: HIVE-20917
             Project: Hive
          Issue Type: Improvement
          Components: Serializers/Deserializers
            Reporter: nicolas paris

The OpenCSVSerde produces a CSV with all its columns quoted 

no matter of they type or if the string columns contain a separator or not.


The problem is some readers (such postgresql) are not compatible with

such CSV, in particular when bulk loading them thought COPY statement.


I propose a new CsvSerde, based on a Univocity Parser (wich is used by Apache 

that has been described a 2 times faster thant OpenCSV. 
[] . This new CsvSerde 
whould only quote columns when needed.



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