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https://issues.apache.org/jira/browse/SPARK-28497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-28497:
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Assignee: Gengliang Wang
> Disallow upcasting complex data types to string type
> ----------------------------------------------------
>
> Key: SPARK-28497
> URL: https://issues.apache.org/jira/browse/SPARK-28497
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Gengliang Wang
> Assignee: Gengliang Wang
> Priority: Minor
>
> In the current implementation. complex types like Array/Map/StructType are
> allowed to upcast as StringType.
> This is not safe casting. We should disallow it.
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