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https://issues.apache.org/jira/browse/SPARK-31036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-31036:
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Assignee: Hyukjin Kwon
> Use stringArgs in Expression.toString to respect hidden parameters
> ------------------------------------------------------------------
>
> Key: SPARK-31036
> URL: https://issues.apache.org/jira/browse/SPARK-31036
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Hyukjin Kwon
> Assignee: Hyukjin Kwon
> Priority: Minor
>
> Currently, the top of https://github.com/apache/spark/pull/27657,
> {code}
> val identify = udf((input: Seq[Int]) => input)
> spark.range(10).select(identify(array("id"))).show()
> {code}
> shows hidden parameter `useStringTypeWhenEmpty`.
> {code}
> +---------------------+
> |UDF(array(id, false))|
> +---------------------+
> | [0]|
> | [1]|
> ...
> {code}
> This is a general problem and we should respect hidden parameters.
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