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https://issues.apache.org/jira/browse/FLINK-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834608#comment-15834608
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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_r97314983
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/ExpressionUtils.scala
---
@@ -151,4 +155,35 @@ object ExpressionUtils {
rexBuilder.makeExactLiteral(value))
}
+ /** Computes the rollup of bit sets.
+ *
+ * <p>For example, <code>rollup({0}, {1})</code>
--- End diff --
According to Scala style guide
(http://docs.scala-lang.org/style/scaladoc.html):
"Use the wiki-style syntax instead of HTML wherever possible"
> 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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