Github user gatorsmile commented on a diff in the pull request:
    --- Diff: 
    @@ -36,11 +38,14 @@ import org.apache.spark.sql.types.StructType
     case class DataSourceV2ScanExec(
         fullOutput: Seq[AttributeReference],
    -    @transient reader: DataSourceReader)
    +    @transient reader: DataSourceReader,
    +    @transient sourceClass: Class[_ <: DataSourceV2])
       extends LeafExecNode with DataSourceReaderHolder with ColumnarBatchScan {
       override def canEqual(other: Any): Boolean = 
    +  override def simpleString: String = s"Scan $metadataString"
    --- End diff --
    For your info,
 is also updating the output of the explain. Overriding the nodeName looks 
better for UI.


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