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

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

    [ https://issues.apache.org/jira/browse/FLINK-20861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17259455#comment-17259455 ] 

Q Kang commented on FLINK-20861:
--------------------------------

Also if the community thinks this is worth doing, please assign it to me. Thanks.

> 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
>            Priority: Minor
>
> 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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