Xpray opened a new pull request #6455: [FLINK-9997][TableAPI & SQL] Improve Expression Reduce URL: https://github.com/apache/flink/pull/6455 ## What is the purpose of the change Improve Expression Reduce ## Brief change log make Project and Filter to Calc and let ReduceExpression.Calc to reduce Calc, then remove Calc if necessary. ## Verifying this change This change added tests and can be verified as follows: org.apache.flink.table.plan.ExpressionReductionRulesTest.testReduceDeterministicUDF ## 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? no
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