sunjincheng121 edited a comment on issue #8550: [FLINK-12401][table] Support incremental emit under AccRetract mode for non-window streaming FlatAggregate on Table API URL: https://github.com/apache/flink/pull/8550#issuecomment-498913495 Since the execution mode 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#heading=h.evvcpnbn30wn)). -emitUpdateWithoutRetract - only for streaming in ACCRetract mode So, In this PR, change the method name from `emitRetractValueIncrementally` to `emitUpdateWithRetract` is better. What do you think?
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