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https://issues.apache.org/jira/browse/FLINK-5315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16555898#comment-16555898
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Rong Rong commented on FLINK-5315:
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Oops. sorry that was what I meant [~twalthr] to use {{'a.distinct.count}} for
expressions such as count, sum etc. My point was doing {{'a.count.distinct}}
doesn't make sense.
[~fhueske] [~hequn8128] Regrading UDAGG. I am actually more favoring the syntax
of {{udagg('a.distinct)}}. To my own understanding {{*.distinct}} seems more of
an expression towards how the operand is suppose to be treated.
{{myUdagg.distinct}} seems confusing to me since we are not applying the
distinct towards the aggregate function. something like {{'a.distinct.myUdagg}}
might be better if it can be supported.
> 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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