bowenli86 opened a new pull request #9962: [FLINK-14218][table] support precise function reference URL: https://github.com/apache/flink/pull/9962 ## What is the purpose of the change Enable referencing functions with fully qualified name in FunctionCatalog. ## Brief change log - added FunctionIdentifier to represent path of either system function or catalog function - changed FunctionCatalog.lookupFunction() interface and enabled to look up functions via FunctionIdentifier - added UT - misc changes to lots of places in planner ## Verifying this change This change added tests and can be verified as follows: - FunctionCatalogTest ## 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)`: (yes) - 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? (docs / JavaDocs) Docs will be added later
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