Jingsong Lee created FLINK-12081:
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Summary: Introduce aggregation operator code generator to blink
batch
Key: FLINK-12081
URL: https://issues.apache.org/jira/browse/FLINK-12081
Project: Flink
Issue Type: New Feature
Components: Table SQL / Planner
Reporter: Jingsong Lee
Assignee: Jingsong Lee
1.Introduce aggregation code generator without keys.
2.Introduce sort aggregation code generator to deal with all aggregate
functions with keys. (Require input in keys order.)
3.Introduce hash aggregation code generator to deal with
DeclarativeAggregateFunction and aggregateBuffers can be update(e.g.: setInt)
in BinaryRow. (Hash Aggregate performs much better than Sort Aggregate)
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