[jira] [Created] (FLINK-12087) Introduce over window operators to blink batch

[Shang Yuanchun (Jira)]

Jingsong Lee created FLINK-12087:
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             Summary: 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


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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