flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From twalthr <...@git.apache.org>
Subject [GitHub] flink pull request #3026: [FLINK-2980] [table] Support for GROUPING SETS cla...
Date Mon, 23 Jan 2017 14:13:13 GMT
Github user twalthr commented on a diff in the pull request:

    --- Diff: docs/dev/table_api.md ---
    @@ -790,6 +790,40 @@ val result = in.groupBy('a).select('a, 'b.sum as 'd);
    +      <td><strong>GroupingSets</strong></td>
    +      <td>
    +        <p>Similar to a SQL GROUP BY GROUPING SETS clause. A GROUPING SETS expression
allows to selectively specify the
    +        set of groups that you want to create within a GROUP BY clause.</p>
    +{% highlight scala %}
    +val in = ds.toTable(tableEnv, 'a, 'b, 'c);
    +val result = in.groupingSets(('a, 'b), 'b, ()).select('a, 'b, 'c.sum as 'd);
    +{% endhighlight %}
    +      </td>
    +    </tr>
    +    <tr>
    +      <td><strong>Cube</strong></td>
    +      <td>
    +        <p>Similar to a SQL GROUP BY CUBE clause. A CUBE expression will generate
subtotals for all combinations of the dimensions specified.</p>
    --- End diff --
    Would be great if you could also add an example. E.g. `.cube('a, 'b)` is equivalent to

If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.

View raw message