JingsongLi commented on issue #8435: [FLINK-12443][table-planner-blink] Replace InternalType with LogicalType in blink URL: https://github.com/apache/flink/pull/8435#issuecomment-495460313 > I would suggest to make this PR as clean as possible, by making the relationship with `TypeInformation`, `LogicalType` and calcite's `RelDataType` clean. I also observed issues similar with aljoscha's comment, and from my experience, it's very unlikely to be cleaned up in the future if we let this PR slip into master. Agree, we can track them from `LogicalTypeConverters`, but a lot of `TypeInformation` still block by `Expression` and `TableEnv` and `Udx`.
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