Yuhong Hong created FLINK-5584:
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Summary: Support Sliding-count row-window on streaming sql
Key: FLINK-5584
URL: https://issues.apache.org/jira/browse/FLINK-5584
Project: Flink
Issue Type: New Feature
Components: Table API & SQL
Reporter: Yuhong Hong
Calcite has already support sliding-count row-window, the grammar look like:
select sum(amount) over (rows 10 preceding) from Order;
select sum(amount) over (partition by user rows 10 preceding) from Order;
And it will parse the sql as a LogicalWindow relnode, the logical Window
contains aggregate func info and window info, it's similar to Flink
LogicalWIndowAggregate, so we can add an convert rule to directly convert
LogicalWindow into DataStreamAggregate relnode, and if Calcite support more
grammar, we can extend the convert rule.
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