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

    https://github.com/apache/spark/pull/16274#discussion_r92413275
  
    --- Diff: 
sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala ---
    @@ -78,10 +78,10 @@ case class ArrayType(elementType: DataType, 
containsNull: Boolean) extends DataT
           ("containsNull" -> containsNull)
     
       /**
    -   * The default size of a value of the ArrayType is 100 * the default 
size of the element type.
    -   * (We assume that there are 100 elements).
    +   * The default size of a value of the ArrayType is 1 * the default size 
of the element type.
    +   * (We assume that there are 1 elements).
        */
    -  override def defaultSize: Int = 100 * elementType.defaultSize
    +  override def defaultSize: Int = 1 * elementType.defaultSize
    --- End diff --
    
    Why multiply by 1?


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