JingsongLi commented on issue #8003: [FLINK-11951][table-common] Enhance UserDefinedFunction interface to allow more user defined types URL: https://github.com/apache/flink/pull/8003#issuecomment-474653408 > Merging this change to `flink-table-common` would introduce instant legacy as we are also thinking about dropping the existing `getResultType` methods and add proper operand type inference and return type strategies, similar to how Calcite functions work. I understand the necessity of this change but I would postpone it a little bit until we have a full type system picture. I see what you mean. It makes sense.
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