[jira] [Assigned] (SPARK-27947) ParsedStatement subclass toString may throw ClassCastException

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-27947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-27947:
------------------------------------

    Assignee:     (was: Apache Spark)

> ParsedStatement subclass toString may throw ClassCastException
> --------------------------------------------------------------
>
>                 Key: SPARK-27947
>                 URL: https://issues.apache.org/jira/browse/SPARK-27947
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: John Zhuge
>            Priority: Minor
>
> In ParsedStatement.productIterator, `case mapArg: Map[_, _]` may match any Map type, thus causing `asInstanceOf[Map[String, String]]` to throw ClassCastException.
> The following test reproduces the issue:
> {code:java}
> case class TestStatement(p: Map[String, Int]) extends ParsedStatement {
>  override def output: Seq[Attribute] = Nil
>  override def children: Seq[LogicalPlan] = Nil
> }
> TestStatement(Map("abc" -> 1)).toString{code}
> Changing the code to `case mapArg: Map[String, String]` will not work due to type erasure. As a matter of fact, compiler gives this warning:
> {noformat}
> Warning:(41, 18) non-variable type argument String in type pattern scala.collection.immutable.Map[String,String] (the underlying of Map[String,String]) is unchecked since it is eliminated by erasure
> case mapArg: Map[String, String] =>{noformat}
>  



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