godfreyhe opened a new pull request #8110: [FLINK-12098] [table-planner-blink] Add support for generating optimized logical plan for simple group aggregate on stream URL: https://github.com/apache/flink/pull/8110 ## What is the purpose of the change *Add support for generating optimized logical plan for simple group aggregate on stream* ## Brief change log *(for example:)* - *add StreamExecGroupAggregateRule to convert logical aggregate to StreamExecGroupAggregate* - *add TwoStageOptimizedAggregateRule to write StreamExecGroupAggregate to two-stage aggregates* - *add StreamExecRetractionRules to handle retraction message* ## Verifying this change This change added tests and can be verified as follows: *(example:)* - *Added AggregateTest for StreamExecGroupAggregate* - *Added TwoStageAggregateTest for TwoStageOptimizedAggregateRule* - *Added RetractionRulesTest for retraction rules* ## 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? (no) - If yes, how is the feature documented? (not documented)
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