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

    https://github.com/apache/spark/pull/20894#discussion_r189064019
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CSVOptions.scala
 ---
    @@ -153,6 +153,12 @@ class CSVOptions(
       val samplingRatio =
         parameters.get("samplingRatio").map(_.toDouble).getOrElse(1.0)
     
    +  /**
    +   * Forcibly apply the specified or inferred schema to datasource files.
    +   * If the option is enabled, headers of CSV files will be ignored.
    +   */
    +  val enforceSchema = getBool("enforceSchema", true)
    --- End diff --
    
    Enforcing schema sounds the names _and also_ types too whereas the current 
PR only deals with the names.


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