sunjincheng created FLINK-12794:
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Summary: 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
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]
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