walterddr opened a new pull request #7995: [FLINK-10019][SQL/Planner] Fix singleton row type objects returned from expression cannot be chained with other operators URL: https://github.com/apache/flink/pull/7995 ## What is the purpose of the change This PR adds tests to ensure that singleton Row type returned objects from expression, such as a UDF, should be successfully parsed and executed. For example: `MyUDF(myArg).f0` should not fail if MyUDF returns singleton Row. such as `Row.of(1)` See [CALCITE-2468](https://issues.apache.org/jira/browse/CALCITE-2468). ## Brief change log - This PR adds test/ITCase for the above mentioned example. ## Verifying this change This change only adds tests. ## 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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