Jark Wu created FLINK-30129:
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Summary: Push projection through ChangelogNormalize
Key: FLINK-30129
URL: https://issues.apache.org/jira/browse/FLINK-30129
Project: Flink
Issue Type: New Feature
Components: Table SQL / Planner
Reporter: Jark Wu
Currently, the ChangelogNormalize node is generated during the physical
optimization phase. That means the projection is not pushed through
ChangelogNormalize if the {{TableSource}} doesn't support
{{SupportsProjectionPushDown}}. We can implement such optimization to reduce
the state size (fewer columns in state value) and better throughput (only
changes on the selected columns will be emitted).
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