Aitozi created FLINK-29748:
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             Summary: Expose the optimize phase in the connector context
                 Key: FLINK-29748
                 URL: https://issues.apache.org/jira/browse/FLINK-29748
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner, Table SQL / Runtime
            Reporter: Aitozi


Currently, in the connector it can not know whether the whole optimize is 
finished.
When the optimize finished, the all information is static, eg: the reading 
partitions. If I want to validate the final optimized result (like whether the 
reading partition is too much or empty), it needs the context of what is the 
current phase. I think the {{ScanContext}} is ok to expose this information. 




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