Github user beyond1920 commented on the issue: https://github.com/apache/flink/pull/3406 @fhueske, thanks for your review. I changed the pr based on your suggestions, except for one point. About adding the version field to ExternalCatalogCompatible, could we define tableType is identifier, it includes version information. For example, kafka0.8/ kafka0.9 / kafka1.0 or hive1.0/ hive2.0.
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