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https://issues.apache.org/jira/browse/FLINK-6598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16012537#comment-16012537
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Fabian Hueske commented on FLINK-6598:
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I just checked and FLINK-6428 is already supported.
During logical optimization it is translated into a GROUP BY without
aggregation function.
So by not changing the rules, we automatically support {{SELECT DISTINCT}}.
> Fix `DataStreamGroupAggregateRule`and `DataStreamGroupWindowAggregateRule`
> matches error.
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-6598
> URL: https://issues.apache.org/jira/browse/FLINK-6598
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
> Fix For: 1.3.0
>
>
> Changes as follows:
> 1. Add {{!agg.getAggCallList.isEmpty}} condition for
> {{DataStreamGroupWindowAggregateRule}} and {{DataStreamGroupAggregateRule}}.
> 2. Remove useless param {{rowRelDataType}} of {{DataStreamGroupAggregate}}.
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