twalthr commented on issue #7664: [FLINK-11449][table] Uncouple the Expression class from RexNodes. URL: https://github.com/apache/flink/pull/7664#issuecomment-472747536 I think we are on the same page about the goal. The questions is how many times do we want to break SPI implementations. But if you think we should prioritize this issue higher we can. I would like to focus on the main API so far and let SPI API as it is for now.
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