JingsongLi commented on issue #10989: [FLINK-15840][table-planner-blink] ClassCastException is thrown when use tEnv.from for temp/catalog table URL: https://github.com/apache/flink/pull/10989#issuecomment-581088372 Hi @wuchong , you can take a look to `FlinkPlannerImpl`, it needs many things: ``` config: FrameworkConfig, catalogReaderSupplier: JFunction[JBoolean, CalciteCatalogReader], typeFactory: FlinkTypeFactory, cluster: RelOptCluster ``` `TableScanRule` also can not find these arguments. And I don't think this is a good way. `FlinkToRelContext` is bad idea to me. Just fix `TableScanRule` looks like a very temporary fix, and we don't know if there is another `ToRelContext`. In 1.11, there is another plan to support computed column in table api, as I said above, it is considered to separate the compute column translation and complete translation in the parser stage.
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