Noémi Pap-Takács created IMPALA-15061:
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             Summary: Refactor and Improve IcebergFileMetadataLoader
                 Key: IMPALA-15061
                 URL: https://issues.apache.org/jira/browse/IMPALA-15061
             Project: IMPALA
          Issue Type: Improvement
          Components: Catalog
            Reporter: Noémi Pap-Takács
            Assignee: Noémi Pap-Takács


IcebergFileMetadataLoader has changed a lot recently due to many optimizations 
added over time. Now there are many different ways to (incrementally) reload a 
table; reusing file descriptors or not, loading all content files/just the new 
additions, etc.

It's time to do a refactor in file metadata loading to make the code more clear 
and easy to understand. We can also add some optimizations/shortcuts once we 
can identify the different scenarios where it is feasible.



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