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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7491) Support COLLECT Aggregate function in Flink SQL
Date Tue, 26 Sep 2017 16:44:02 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181112#comment-16181112
] 

ASF GitHub Bot commented on FLINK-7491:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4585#discussion_r141113194
  
    --- Diff: docs/dev/table/sql.md ---
    @@ -2107,6 +2108,17 @@ VAR_SAMP(value)
             <p>Returns the sample variance (square of the sample standard deviation)
of the numeric field across all input values.</p>
           </td>
         </tr>
    +
    +    <tr>
    +      <td>
    +          {% highlight text %}
    +          COLLECT(value)
    +          {% endhighlight %}
    +      </td>
    +      <td>
    +          <p>Returns a multiset of the <i>value</i>s.</p>
    --- End diff --
    
    Be more specific about the handling of `null` values. Are they ignored? What is returned
if only null values are added (`null` or empty multiset)?


> Support COLLECT Aggregate function in Flink SQL
> -----------------------------------------------
>
>                 Key: FLINK-7491
>                 URL: https://issues.apache.org/jira/browse/FLINK-7491
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Shuyi Chen
>            Assignee: Shuyi Chen
>




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