Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/3026#discussion_r97311360
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/table.scala
---
@@ -928,5 +1032,151 @@ class GroupWindowedTable(
val fieldExprs = ExpressionParser.parseExpressionList(fields)
select(fieldExprs: _*)
}
+}
+
+/**
+ * A table that has been grouped on several sets of grouping keys.
+ */
+class GroupingSetsTable(
--- End diff --
In order to reduce the code complexity, we should adapt `GroupedTable` and
do a case distinction there. 4 kinds of grouped tables are too much.
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