Github user chenghao-intel commented on a diff in the pull request:

    https://github.com/apache/spark/pull/4289#discussion_r24057600
  
    --- Diff: 
sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala ---
    @@ -315,9 +335,23 @@ private[hive] object HadoopTableReader extends 
HiveInspectors {
           }
         }
     
    +    val partTblObjectInspectorConverter = 
ObjectInspectorConverters.getConverter(
    +      deserializer.getObjectInspector, soi)
    +
         // Map each tuple to a row object
         iterator.map { value =>
    -      val raw = deserializer.deserialize(value)
    +      val raw = convertdeserializer match {
    --- End diff --
    
    In general, we'd better not to do the pattern matching within the iterator, 
and we can do that like:
    `
    xx match {
      case xxx => iterator.map { ... }
      case yyy => iterator.map { ... }
    }
    ```
    
    For this case, as I shown above, if we passed the converter directly into 
`fillObject`, I don't think we need the pattern match here.


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