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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2022/11/22 06:35:00 UTC

[jira] [Created] (FLINK-30129) Push projection through ChangelogNormalize

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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