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https://issues.apache.org/jira/browse/FLINK-12087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kurt Young closed FLINK-12087.
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Resolution: Fixed
Fix Version/s: 1.9.0
fixed in 91221d6507655c6af366adb5aea075640a0a90a2
> Introduce over window operators to blink batch
> ----------------------------------------------
>
> Key: FLINK-12087
> URL: https://issues.apache.org/jira/browse/FLINK-12087
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Runtime
> Reporter: Jingsong Lee
> Assignee: Jingsong Lee
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.9.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Introduce NonBufferOverWindowOperator: Some over windows do not need to
> buffer data, such as rank, rows between unbounded preceding and 0, etc. We
> introduce NonBufferOverWindowOperator to reduce the overhead of data copy in
> buffer.
> Introduce BufferDataOverWindowOperator and OverWindowFrame: 1. Minimize
> duplicate computation in various OverWindowFrame implementations. 2. An
> OverWindowOperator can compute multiple window frames.
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