THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Note: currently nested columns in column list of an insert/update statement is unsupported (as described in FLINK-31301 & FLINK-31344), so we can make this flip support simple columns first and then support nested columns after FLINK-31301 & FLINK-31344 fixed.
Compatibility, Deprecation, and Migration Plan
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