wuchong 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-581090252 Hi @JingsongLi , I'm not sure whether it works to separate the computed column translation to parser stage, because adding a watermark node requires the `FlinkToRelContext` too and it has to happen in `CatalogSourceTable#toRel`. I didn't mean to create a `FlinkPlannerImpl` in the rule, I mean we can pass the `FlinkToRelContext` to the rule via `FlinkContext`.
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