You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@flink.apache.org by "Hequn Cheng (JIRA)" <ji...@apache.org> on 2019/06/10 09:15:00 UTC

[jira] [Assigned] (FLINK-12794) Support ACC mode for non-window streaming FlatAggregate on Table API

     [ https://issues.apache.org/jira/browse/FLINK-12794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hequn Cheng reassigned FLINK-12794:
-----------------------------------

    Assignee: Hequn Cheng

> Support ACC mode for non-window streaming FlatAggregate on Table API
> --------------------------------------------------------------------
>
>                 Key: FLINK-12794
>                 URL: https://issues.apache.org/jira/browse/FLINK-12794
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>    Affects Versions: 1.9.0
>            Reporter: sunjincheng
>            Assignee: Hequn Cheng
>            Priority: Major
>
> Since the execution of the Stream operator has two modes, `ACC` and `ACCRetract`, users can achieve better performance by implementing special interfaces for streaming. The table below is a quick summary.
> | |emitValue|emitUpdateWithRetract|emitUpdateWithoutRetract|
> |ACC|Y|N|Y|
> |ACCRetract|Y|Y|N|
>  * emitValue - for batch and streaming.
>  * eimitUpdateWithRetract - only for streaming in ACC mode(need key definition on TableAggregateFunction, [under discussion|https://docs.google.com/document/d/183qHo8PDG-xserDi_AbGP6YX9aPY0rVr80p3O3Gyz6U/edit?usp=sharing]).
>  * emitUpdateWithoutRetract - only for streaming in ACCRetract mode.
>  In this Jira we will add the ACC mode support for non-window streaming FlatAggregate. the detail can be found in [Flip-29|https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=97552739]



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)