Github user mgaido91 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/23150#discussion_r237451758
  
    --- Diff: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/CSVInferSchema.scala
 ---
    @@ -23,10 +23,16 @@ import scala.util.control.Exception.allCatch
     
     import org.apache.spark.rdd.RDD
     import org.apache.spark.sql.catalyst.analysis.TypeCoercion
    -import org.apache.spark.sql.catalyst.util.DateTimeUtils
    +import org.apache.spark.sql.catalyst.util.DateTimeFormatter
     import org.apache.spark.sql.types._
     
    -object CSVInferSchema {
    +class CSVInferSchema(val options: CSVOptions) extends Serializable {
    --- End diff --
    
    since we get the `CSVOptions` in the constructor, shall we remove it as a 
parameter of the several methods? it is pretty confusing which one is used 
right now...


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