Github user zero323 commented on a diff in the pull request:
https://github.com/apache/spark/pull/17807#discussion_r114058688
--- Diff: R/pkg/R/functions.R ---
@@ -3803,3 +3803,89 @@ setMethod("repeat_string",
jc <- callJStatic("org.apache.spark.sql.functions", "repeat",
x@jc, numToInt(n))
column(jc)
})
+
+#' is_grouping
+#'
+#' Indicates whether a specified column in a GROUP BY list is aggregated
or not,
+#' returns 1 for aggregated or 0 for not aggregated in the result set.
--- End diff --
As far as I remember this is actually SQL:1999 standard. And has direct
relation to binary encoding used for grouping id.
Maybe `is_grouping` is not the most fortunate choice of name, but I don't
have a better idea. Theoretically we can use just `grouping` and let users
worry about disambiguation.
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