Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5282#discussion_r27457879
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala ---
@@ -189,6 +189,128 @@ final class DataFrameNaFunctions private[sql](df:
DataFrame) {
*/
def fill(valueMap: Map[String, Any]): DataFrame = fill0(valueMap.toSeq)
+ /**
+ * Replaces values matching keys in `replacement` map with the
corresponding values.
+ * Key and value of `replacement` map must have the same type, and can
only be doubles or strings.
+ * If `col` is "*", then the replacement is applied on all string
columns or numeric columns.
--- End diff --
What about it? I don't think there is anything special -- it should not
match anything.
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