[jira] [Created] (FLINK-20861) Provide an option for serializing DECIMALs in JSON as plain number instead of scientific notation

["Q Kang (Jira)" <ji...@apache.org>]

Q Kang created FLINK-20861:
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             Summary: Provide an option for serializing DECIMALs in JSON as plain number instead of scientific notation
                 Key: FLINK-20861
                 URL: https://issues.apache.org/jira/browse/FLINK-20861
             Project: Flink
          Issue Type: Improvement
          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
            Reporter: Q Kang


When using DECIMAL types in Flink SQL along with JSON format, it is quite common to see that some large values are written out as scientific notation. For example:

Definition: `orderId DECIMAL(20, 0)`

Input: `\{"orderId":454621864049246170}`

Output (without transformations): `\{"orderId":4.5462186404924617E+17}`

However, values in plain numbers are easier to understand and more convenient for the case shown above. So we can provide a boolean option (say `json.use-plain-decimals`?) to make this behavior tunable.



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