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Posted to issues@spark.apache.org by "Jungtaek Lim (JIRA)" <ji...@apache.org> on 2019/03/01 09:10:00 UTC

[jira] [Commented] (SPARK-26991) Investigate difference of `returnNullable` between ScalaReflection.deserializerFor and JavaTypeInference.deserializerFor

    [ https://issues.apache.org/jira/browse/SPARK-26991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781487#comment-16781487 ] 

Jungtaek Lim commented on SPARK-26991:
--------------------------------------

This issue could be extended to investigate the difference between ScalaReflection and JavaTypeInference, as we have found another case as well.

[https://github.com/apache/spark/pull/23908#discussion_r261511454]

 

> Investigate difference of `returnNullable` between ScalaReflection.deserializerFor and JavaTypeInference.deserializerFor
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-26991
>                 URL: https://issues.apache.org/jira/browse/SPARK-26991
>             Project: Spark
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Jungtaek Lim
>            Priority: Major
>
> This issue tracks the effort on investigation on difference between ScalaReflection.deserializerFor and JavaTypeInference.deserializerFor, especially the reason why Java side uses `returnNullable = true` whereas `returnNullable = false`.
> The origin discussion is linked here:
> https://github.com/apache/spark/pull/23854#discussion_r260117702



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