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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5315) Support distinct aggregations in table api
Date Thu, 09 Aug 2018 08:42:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16574484#comment-16574484

ASF GitHub Bot commented on FLINK-5315:

fhueske commented on issue #6521: [FLINK-5315][table] Adding support for distinct operation
for table API on DataStream
URL: https://github.com/apache/flink/pull/6521#issuecomment-411683146
   Thanks for the PR @walterddr!
   I did not have a detailed look, but we would also need to add support for the Java Table
API which parses Strings to Expressions. 
   Cheers, Fabian

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> 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 &amp; SQL
>            Reporter: Kurt Young
>            Assignee: Rong Rong
>            Priority: Major
>              Labels: pull-request-available
> Support distinct aggregations in Table API in the following format:
> For Expressions:
> {code:scala}
> 'a.count.distinct // Expressions distinct modifier
> {code}
> For User-defined Function:
> {code:scala}
> singleArgUdaggFunc.distinct('a) // FunctionCall distinct modifier
> multiArgUdaggFunc.distinct('a, 'b) // FunctionCall distinct modifier
> {code}

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