Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18820#discussion_r131569954
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala ---
@@ -366,11 +370,15 @@ final class DataFrameNaFunctions private[sql](df:
DataFrame) {
return df
}
- // replacementMap is either Map[String, String] or Map[Double, Double]
or Map[Boolean,Boolean]
- val replacementMap: Map[_, _] = replacement.head._2 match {
- case v: String => replacement
- case v: Boolean => replacement
- case _ => replacement.map { case (k, v) => (convertToDouble(k),
convertToDouble(v)) }
+ // replacementMap is either Map[String, String], Map[Double, Double],
Map[Boolean,Boolean]
+ // while value can have null
--- End diff --
If the types are not these three types, what are the behaviors? Could you
explain them here? Also, please add negative examples too. Thanks~
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