xccui opened a new pull request #6535: [FLINK-9977] [table][doc] Refine the SQL/Table built-in function docs URL: https://github.com/apache/flink/pull/6535 ## What is the purpose of the change This PR refines the documentation for all the SQL/Table built-in functions. ## Brief change log - Merge the docs for SQL/Table built-in functions into a new separate page (functions.html). - Rewrite most of the docs to try to make them consistent and correct. - Refine the corresponding test cases in `SqlExpressionTest.scala`. **Note: The old docs about built-in functions in sql.html and tableApi.html should be removed after the new page being verified.** ## Verifying this change This change is a trivial rework / code cleanup without any test coverage. ## 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? (docs)
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