Github user davies commented on a diff in the pull request:

    https://github.com/apache/spark/pull/11636#discussion_r56455795
  
    --- Diff: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
 ---
    @@ -60,17 +60,28 @@ case class BoundReference(ordinal: Int, dataType: 
DataType, nullable: Boolean)
     
       override def genCode(ctx: CodegenContext, ev: ExprCode): String = {
         val javaType = ctx.javaType(dataType)
    -    val value = ctx.getValue(ctx.INPUT_ROW, dataType, ordinal.toString)
    +    val value = if (!ctx.isColumnarType(ctx.INPUT_ROW)) {
    +      ctx.getValue(ctx.INPUT_ROW, dataType, ordinal.toString)
    +    } else {
    +      ctx.getValue(ctx.INPUT_ROW, dataType, ctx.INPUT_COLORDINAL)
    --- End diff --
    
    Since it's only used in one place, I'd like to narrow down the changes, 
it's easier to maintain.


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