maropu commented on a change in pull request #30144:
URL: https://github.com/apache/spark/pull/30144#discussion_r605527431
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/grouping.scala
##########
@@ -212,3 +212,27 @@ object GroupingID {
if (SQLConf.get.integerGroupingIdEnabled) IntegerType else LongType
}
}
+
+
+object GroupingAnalytics {
+ def unapply(exprs: Seq[Expression])
+ : Option[(Seq[Seq[Expression]], Seq[Seq[Expression]], Seq[Expression])] = {
+ val (groupingSetExprs, others) =
exprs.partition(_.isInstanceOf[GroupingSet])
+ if (groupingSetExprs.isEmpty) {
+ None
+ } else {
+ val groupingSets = groupingSetExprs.map(_.asInstanceOf[GroupingSet])
+ val groups = groupingSets.flatMap(_.groupByExprs) ++ others
+ val selectedGroupByExprs = groupingSets.map(_.selectedGroupByExprs)
+ .foldRight(Seq.empty[Seq[Expression]]) { (x, y) =>
+ if (y.isEmpty) {
+ x
+ } else {
+ for (a <- x; b <- y) yield b ++ a
+ }
+ }.map(others ++ _).map(_.distinct)
Review comment:
```
}.map { g =>
(others ++ g).distinct
}
```
?
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