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https://issues.apache.org/jira/browse/FLINK-5315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558276#comment-16558276
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Hequn Cheng commented on FLINK-5315:
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Hi, [~walterddr] I think {{boolean distinct}} is a property of Aggregate, so it
is not confusing write it as {{myUdagg.distinct('a)}} and
{{multiParamAgg.distinct('a, 'b)}}. Also, I think we probably should write
{{count(distinct a)}} as {{a.count.distinct}} to make it consistent with
UDAGGs. When we write count.distinct, it is also means CountDistinct, because
we can't perform continuous aggCall.
What do you think? [~fhueske] [~twalthr]
> Support distinct aggregations in table api
> ------------------------------------------
>
> Key: FLINK-5315
> URL: https://issues.apache.org/jira/browse/FLINK-5315
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Kurt Young
> Assignee: Rong Rong
> Priority: Major
>
> Such as
> {code}
> t.select("count(distinct a), sum(b)")
> {code}
> or
> {code}
> t.select('a.count.distinct), 'b.sum)
> {code}
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