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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