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Posted to issues@spark.apache.org by "Fangshi Li (JIRA)" <ji...@apache.org> on 2018/04/04 04:28:00 UTC

[jira] [Created] (SPARK-23862) Spark ExpressionEncoder should support java enum type in scala

Fangshi Li created SPARK-23862:
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             Summary: Spark ExpressionEncoder should support java enum type in scala
                 Key: SPARK-23862
                 URL: https://issues.apache.org/jira/browse/SPARK-23862
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.0
            Reporter: Fangshi Li


In SPARK-21255, spark upstream adds support for creating encoders for java enum types, but the support is only added to Java API(for enum working within Java Beans). Since the java enum can come from third-party java library, we have use case that requires 
1. using java enum types as field of scala case class
2. using java enum as the type T in Dataset[T]

Spark ExpressionEncoder already supports ser/de many java types in ScalaReflection, so we propose to add support for java enum as well, as a follow up of SPARK-21255.



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