JingsongLi opened a new pull request #11596: [FLINK-16860][orc] Distinguish empty filters from no pushed down in expainSource URL: https://github.com/apache/flink/pull/11596 ## What is the purpose of the change After FLINK-12399. there are bugs in OrcTableSource. The case is there are some filters to be pushed down to source, but source can not consume them. We need distinguish empty filters from no pushed down in expainSource. ## Brief change log Return "null" if no filter pushed down, return "true" there is filter pushed down. ## Verifying this change `OrcTableSourceTest.testUnsupportedPredOnly` ## 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, Kubernetes/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**)
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