sunjincheng121 commented on issue #7664: [FLINK-11449][table] Uncouple the Expression class from RexNodes. URL: https://github.com/apache/flink/pull/7664#issuecomment-472775077 So, I'll check whether the changes are needed by port catalog. If so I'll create a new JIRA. for this change. If it not the blocker for our FLIP-32 items, we can lower priority.
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