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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2980) Add CUBE/ROLLUP/GROUPING SETS operator in Table API.
Date Mon, 23 Jan 2017 14:13:28 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834608#comment-15834608
] 

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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