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https://issues.apache.org/jira/browse/FLINK-8355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332919#comment-16332919
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ASF GitHub Bot commented on FLINK-8355:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/5320
> DataSet Should not union a NULL row for AGG without GROUP BY clause.
> --------------------------------------------------------------------
>
> Key: FLINK-8355
> URL: https://issues.apache.org/jira/browse/FLINK-8355
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: sunjincheng
> Priority: Major
>
> Currently {{DataSetAggregateWithNullValuesRule}} will UINON a NULL row for
> non grouped aggregate query. when {{CountAggFunction}} support
> {{COUNT(*)}}(FLINK-8325). the result will incorrect.
> for example, if Tabble {{T1}} has 3 records. when we run the follow SQL in
> DataSet:
> {code}
> SELECT COUNT(*) as cnt from Tab // cnt = 4(incorrect).
> {code}
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