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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-12098) Add support for generating optimized logical plan for simple group aggregate on stream
Date Wed, 03 Apr 2019 12:30:03 GMT

     [ https://issues.apache.org/jira/browse/FLINK-12098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ASF GitHub Bot updated FLINK-12098:
-----------------------------------
    Labels: pull-request-available  (was: )

> Add support for generating optimized logical plan for simple group aggregate on stream
> --------------------------------------------------------------------------------------
>
>                 Key: FLINK-12098
>                 URL: https://issues.apache.org/jira/browse/FLINK-12098
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table SQL / Planner
>            Reporter: godfrey he
>            Assignee: godfrey he
>            Priority: Major
>              Labels: pull-request-available
>
> This issue only involves simple stream group aggregate, complex group aggregate(including
GROUP SETS and DISTINCT) will also be finished in new issue.
> A logical aggregate will be converted to StreamExecGroupAggregate, and a StreamExecGroupAggregate
will be written to two-stage aggregates (StreamExecLocalGroupAggregate and StreamExecGlobalGroupAggregate)
if mini-batch is enabled and all aggregate functions are mergeable.
> Retraction rules will also be ported, because multiple level aggregates will produce
retraction message.



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