hopepanwei commented on issue #12510:
URL: https://github.com/apache/doris/issues/12510#issuecomment-1241770836

   example:
   
   csv data :
   ```
   2016-07-25 00:00:00\t"this is a text"\t\t2016-08-23 00:00:00
   2016-07-25 00:00:00\t"this is a text"\t"this is a text"\t2016-08-23 00:00:00
   ```
   
   I hope that after importing
   ```
   2016-07-25 00:00:00\t"this is a text"\tNULL\t2016-08-23 00:00:00
   2016-07-25 00:00:00\t"this is a text"\t"this is a text"\t2016-08-23 00:00:00
   ```
   
   but 
   ```
   2016-07-25 00:00:00\t"this is a text"\""\t2016-08-23 00:00:00
   2016-07-25 00:00:00\t"this is a text"\t"this is a text"\t2016-08-23 00:00:00
   ```
   
   I see that in the source code in be\src\runtime\result_writer.cpp 
   ```
   namespace doris {
   
   const std::string ResultWriter::NULL_IN_CSV = "\\N";
   
   }
   ```
   Is this the reason? Can you change this parameter to HTTP header
   
   
   
   
   


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