Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/17818#discussion_r114246336
--- Diff: R/pkg/R/functions.R ---
@@ -3890,3 +3890,23 @@ setMethod("not",
jc <- callJStatic("org.apache.spark.sql.functions", "not",
x@jc)
column(jc)
})
+
+#' input_file_name
+#'
+#' Creates a string column for the file name of the current Spark task.
--- End diff --
I actually find this description in Scala API quite a bit confusing - what
is "Spark task" and how it has "file name"?
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