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https://issues.apache.org/jira/browse/FLINK-4832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15686433#comment-15686433
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ASF GitHub Bot commented on FLINK-4832:
---------------------------------------
Github user ex00 commented on the issue:
https://github.com/apache/flink/pull/2840
Hi @fhueske
>Actually, I think implementing the fix as an optimizer rule would be the
nicer solution. In that case we could transform one of the ITCases into a test
that extends the TableTestBase.
What do you think?
I'm think it is good idea. I can create ``AggregationTest extends
TableTestBase`` where we will verify sql for queries are containing aggregate
functions
> Count/Sum 0 elements
> --------------------
>
> Key: FLINK-4832
> URL: https://issues.apache.org/jira/browse/FLINK-4832
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Anton Mushin
>
> Currently, the Table API is unable to count or sum up 0 elements. We should
> improve DataSet aggregations for this. Maybe by union the original DataSet
> with a dummy record or by using a MapPartition function. Coming up with a
> good design for this is also part of this issue.
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