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Posted to issues@spark.apache.org by "Jackey Lee (Jira)" <ji...@apache.org> on 2019/10/12 02:09:00 UTC

[jira] [Created] (SPARK-29444) Add configuration to support JacksonGenrator to keep fields with null values

Jackey Lee created SPARK-29444:
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             Summary: Add configuration to support JacksonGenrator to keep fields with null values
                 Key: SPARK-29444
                 URL: https://issues.apache.org/jira/browse/SPARK-29444
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Jackey Lee


DataSet.toJSON will lost some column when field data is null. Maybe it is better to keep null data in some scenarios.

Such as sparkmagic, which is widely used in jupyter with livy, we use toJSON to toJSON is used to get sql results. with toJSON sparkmagic may return empty results, which confused users.

Maybe adding a config is the best choice. This configuration retains the current semantics and will remain fields with null until the configuration is modified.



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