L. C. Hsieh created SPARK-29946:
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Summary: Special serialization for certain key types of Map type
in JacksonGenerator
Key: SPARK-29946
URL: https://issues.apache.org/jira/browse/SPARK-29946
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: L. C. Hsieh
Currently JacksonGenerator serializes MapType to JSON, the key of map is
serialized by calling toString() of the key. For some types, like UnsafeRow,
the toString is not human readable. So currently the map key in JSON is not
very useful for some types.
We should do special serialization for certain key types of Map.
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