JingsongLi opened a new pull request #8099: [FLINK-12081][table-planner-blink] Introduce aggregation operator code generator to blink batch URL: https://github.com/apache/flink/pull/8099 ## What is the purpose of the change 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) ## Verifying this change ut ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): (no) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: (no) ## Documentation - Does this pull request introduce a new feature? (yes) - If yes, how is the feature documented? (JavaDocs)
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