godfreyhe opened a new pull request #11158: [FLINK-16070] [table-planner-blink] blink stream planner supports remove constant keys from an aggregate URL: https://github.com/apache/flink/pull/11158 ## What is the purpose of the change *currently AggregateProjectPullUpConstantsRule is in cost-based phase (logical phase), while RelMdPredicates does not work when meeting RelSubset. So we can add AggregateProjectPullUpConstantsRule into hep planner to fix the bug.* ## Brief change log - *add AggregateProjectPullUpConstantsRule into default_write phase* ## Verifying this change This change added tests and can be verified as follows: - *Added testGroupByConstantKey method in AggregateTest to validate constant group key in queres* ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (yes / **no**) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**) - The serializers: (yes / **no** / don't know) - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know) - The S3 file system connector: (yes / **no** / don't know) ## Documentation - Does this pull request introduce a new feature? (yes / **no**) - If yes, how is the feature documented? (not applicable / docs / JavaDocs / **not documented**)
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