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https://issues.apache.org/jira/browse/FLINK-20831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-20831.
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Resolution: Invalid
> Introduce the in memory topN buffer
> -----------------------------------
>
> Key: FLINK-20831
> URL: https://issues.apache.org/jira/browse/FLINK-20831
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Runtime
> Affects Versions: 1.13.0
> Reporter: Shengkai Fang
> Priority: Major
> Labels: auto-unassigned, pull-request-available
>
> The buffer is used to cache the record and only keep the topN records. When
> the invoker decide to emit or snapshot, it can get the sorted records from
> the buffer. The main benfit of the buffer is that it can reduce the
> per-record state visit.
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