Jirapat Jirasirikul created AVRO-1868:
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             Summary: Increase precision digits of JSON encodeNumber(double)
                 Key: AVRO-1868
                 URL: https://issues.apache.org/jira/browse/AVRO-1868
             Project: Avro
          Issue Type: Improvement
          Components: c++
            Reporter: Jirapat Jirasirikul
            Priority: Minor


The JSON encodeNumber(double) function writes value to output string stream. 
The default precision is 6 which is not sufficient for many applications for 
encoding a double.

std::setprecision(16) should be used to set max precision to 16 digits. Note 
that doing this would not unnecessarily append zeros to force 16 digits.



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