[jira] [Resolved] (SPARK-25096) Loosen nullability if the cast is force-nullable.

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-25096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-25096.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.4.0

Issue resolved by pull request 22086
[https://github.com/apache/spark/pull/22086]

> Loosen nullability if the cast is force-nullable.
> -------------------------------------------------
>
>                 Key: SPARK-25096
>                 URL: https://issues.apache.org/jira/browse/SPARK-25096
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.0
>            Reporter: Takuya Ueshin
>            Assignee: Takuya Ueshin
>            Priority: Major
>             Fix For: 2.4.0
>
>
> In type coercion for complex types, if the found type is force-nullable to cast, we should loosen the nullability to be able to cast. Also for map key type, we can't use the type.



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