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https://issues.apache.org/jira/browse/FLINK-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834609#comment-15834609
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ASF GitHub Bot commented on FLINK-2980:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/3026#discussion_r97310709
--- 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(
+ private[flink] val table: Table,
+ private[flink] val groups: Seq[Seq[Expression]],
+ private[flink] val sqlKind: SqlKind) {
--- End diff --
I think we don't need this parameter if the translation is done in `cube()`
and `rollup()` already.
> Add CUBE/ROLLUP/GROUPING SETS operator in Table API.
> ----------------------------------------------------
>
> Key: FLINK-2980
> URL: https://issues.apache.org/jira/browse/FLINK-2980
> Project: Flink
> Issue Type: New Feature
> Components: Documentation, Table API & SQL
> Reporter: Chengxiang Li
> Assignee: Alexander Chermenin
> Attachments: Cube-Rollup-GroupSet design doc in Flink.pdf
>
>
> Computing aggregates over a cube/rollup/grouping sets of several dimensions
> is a common operation in data warehousing. It would be nice to have them in
> Table API.
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